States /

Reported sewage discharges in Illinois

Updated Nov 6, 2026, 4:03 AM EST. We track 429 waters in Illinois: 0 with a sewage discharge status, 68 with caution after a discharge, and 0 with no confirmed discharge end. Beach advisories are listed on 5. 356 have no current status on their water outline. 8 discharge records dated within the last 30 days.

The law and practice: Illinois sets no period after a sewage discharge during which the water is to be avoided, and no Illinois statute or rule requires the public to be told of a sanitary sewer overflow or a bypass: the permit's conditions require a report to Illinois EPA within 24 hours and a written report within 5 days, and these reports reach the public through the U.S. Environmental Protection Agency's overflow records, usually days later. The rule this site applies, with its source

Source: DirtyWaterWatch statuses from the sources checked automatically, listed below. Updated 2026-11-06 09:03 UTC.

Data and its limits

Dated reports Illinois publishes dated overflow reports; the newest is from Oct 30, 2026.

What the law requires. No Illinois statute or rule requires the public to be told of a sanitary sewer overflow or a treatment plant bypass. Each sewage permit requires a report to the Illinois Environmental Protection Agency within 24 hours and in writing within five days, filed with the U.S. Environmental Protection Agency (EPA). Combined sewer operators (sewage and rainwater in one pipe) must notify the public under their permits. In the Lake Michigan basin (the City of Chicago, the Metropolitan Water Reclamation District of Greater Chicago, or the District, and 37 suburbs), federal rules require electronic public notice within four hours of learning of an overflow, signs at outfalls and public access points, notice to the health department, a seven-day follow-up and an annual notice (40 CFR 122.38). No period after a discharge is set during which the water should be avoided.

What is published. EPA publishes these reports daily, with start and end to the minute, a point, the water and usually the volume: about 1,700 reports from 267 permits since October 2024, about 770 of them read here as reaching a water. A report appears a median of three days after the discharge began. The District publishes a daily map of possible combined sewer overflows at the outfalls it monitors, reset each night, and a table of the times the waterways were let back into Lake Michigan in severe storms (36 since 1985, the last in July 2023). The Department of Public Health's BeachGuard lists beach advisories and closures in effect.

What is not published. The Chicago area's combined sewer overflows are not in EPA's reports: the city, the District and the suburbs file none there. The District's four-hour notices go only by e-mail and text to subscribers; its map gives no times, volumes or archive. Its record of when each outfall's gate opened and closed, kept since 2016, is reached only through an interactive report form that refuses automated reading; published as a download or data feed, it would give every outfall's overflow times. Downstate combined sewer operators' notices were not found online.

Known problems in the data. EPA's reports give times without a time zone; this site reads them as Central time and shows Illinois reports' times in Central time; the map and the site's update times are given in Eastern time. Many reports name a basement, a lawn or no water. Some BeachGuard advisories are years old and still listed as in effect.

What this site does about it. A report is shown to its end, then with this site's caution (72 hours; 96 on lakes, ponds and reservoirs). A possible overflow on the District's map is shown as unconfirmed, dated from when the map marked the outfall: that is when activity was observed, not when the overflow began. Caution runs 14 days, then hatched "End not confirmed" to 30 days after it was marked. A reversal is shown along the lake shore where the waterway enters Lake Michigan (for O'Brien Lock, at the Calumet River's mouth, with the river from the lock to its mouth), for the days the District gives, never on the whole lake. Beach advisories are shown as the health department or park district gives them, for as long as each reading of BeachGuard still lists them. Reports saying sewage stayed out of the water are kept but not placed on one.

As of November 6, 2026, of the 2,110 registered treatment-plant and sewer outfalls in Illinois (closed outfalls aside), 1,674 (79 percent) are tied to a water record on this site and 436 (21 percent) are not yet (the stream they discharge to has no record, or the location given could not be matched); an overflow at one of those appears on the map at its point with no water coloured.

Of this state's reports on this site, 100 percent are dated to the day or better; the newest dated report is from Oct 30, 2026. Coverage: Dated reports.

What stands in the way

The Chicago area's legal channel is an alert list behind a sign-up, and the per-outfall record sits behind a report form. A missing report in EPA's table cannot be told apart from a quiet week.

0 percent of the sewer operators here have each overflow posted on the web, by the operator or the state (0 of 119).

Notice channels that do not reach the public on the web, by reason (a sewer operator can have several):

Not verified119
No web page88
Signs only44
Blocks automated reading3

The operators or agencies behind these counts are not listed yet.

Public-notice channels

265 channels: 6 monitored, 0 publishing a status now

Where operators and agencies in this state tell the public about sewage discharges: pages, lists and feeds required by law or by a permit, and those kept voluntarily. We read the ones we can and say what we find; a channel we do not read says why.

This list needs JavaScript.

Required by law: public-notice channels in this state and what our monitor finds on each
Operator or agency	Channel	What we find
City of Blue Island (Blue Island CSOS) · ILM580031	Operator's notice page	Annual CSO notice not read
City of Blue Island (Blue Island CSOS) · ILM580031	Warning lights or signs	Outfall signs not read
City of Blue Island (Blue Island CSOS) · ILM580031	Health department page	Health department notice not read
City of Calumet City · ILM580025	Operator's notice page	Annual CSO notice not read
City of Calumet City · ILM580025	Warning lights or signs	Outfall signs not read
City of Calumet City · ILM580025	Health department page	Health department notice not read
City of Chicago (Chicago CSO) · IL0045012	Operator's notice page	Annual CSO notice not read
City of Chicago (Chicago CSO) · IL0045012	Warning lights or signs	Outfall signs not read
City of Chicago (Chicago CSO) · IL0045012	Health department page	Health department notice not read
City of Evanston (Evanston CSOS) · ILM580002	Operator's notice page	Annual CSO notice not read
City of Evanston (Evanston CSOS) · ILM580002	Warning lights or signs	Outfall signs not read
City of Evanston (Evanston CSOS) · ILM580002	Health department page	Health department notice not read
City of Harvey (Harvey CSOS) · ILM580020	Operator's notice page	Annual CSO notice not read
City of Harvey (Harvey CSOS) · ILM580020	Warning lights or signs	Outfall signs not read
City of Harvey (Harvey CSOS) · ILM580020	Health department page	Health department notice not read
City of Markham (Markham CSOS) · ILM580028	Operator's notice page	Annual CSO notice not read
City of Markham (Markham CSOS) · ILM580028	Warning lights or signs	Outfall signs not read
City of Markham (Markham CSOS) · ILM580028	Health department page	Health department notice not read
City of Park Ridge (Park Ridge CSOS) · ILM580014	Operator's notice page	Annual CSO notice not read
City of Park Ridge (Park Ridge CSOS) · ILM580014	Warning lights or signs	Outfall signs not read
City of Park Ridge (Park Ridge CSOS) · ILM580014	Health department page	Health department notice not read
Illinois Department of Public Health (Illinois BeachGuard)	State alert page	Read as a feed
Metro Water Reclamation District Of Greater Chicago (MWRDGC Calumet WRP) · IL0028061	Operator's notice page	Annual CSO notice not read
Metro Water Reclamation District Of Greater Chicago (MWRDGC Calumet WRP) · IL0028061	Warning lights or signs	Outfall signs not read
Metro Water Reclamation District Of Greater Chicago (MWRDGC Calumet WRP) · IL0028061	Health department page	Health department notice not read
Metro Water Reclamation District Of Greater Chicago (MWRDGC Stickney WRP) · IL0028053	Operator's notice page	Annual CSO notice not read
Metro Water Reclamation District Of Greater Chicago (MWRDGC Stickney WRP) · IL0028053	Warning lights or signs	Outfall signs not read
Metro Water Reclamation District Of Greater Chicago (MWRDGC Stickney WRP) · IL0028053	Health department page	Health department notice not read
Metro Water Reclamation District Of Greater Chicago (MWRDGC Terrence J O'Brien WTR Reclamation Plant) · IL0028088	Operator's notice page	Annual CSO notice not read
Metro Water Reclamation District Of Greater Chicago (MWRDGC Terrence J O'Brien WTR Reclamation Plant) · IL0028088	Warning lights or signs	Outfall signs not read
Metro Water Reclamation District Of Greater Chicago (MWRDGC Terrence J O'Brien WTR Reclamation Plant) · IL0028088	Health department page	Health department notice not read
Metropolitan Water Reclamation District Of Greater Chicago (MWRDGC- James Kirie WRP) · IL0047741	Operator's notice page	Annual CSO notice not read
Metropolitan Water Reclamation District Of Greater Chicago (MWRDGC- James Kirie WRP) · IL0047741	Warning lights or signs	Outfall signs not read
Metropolitan Water Reclamation District Of Greater Chicago (MWRDGC- James Kirie WRP) · IL0047741	Health department page	Health department notice not read
Village of Arlington Heights (Arlington Heights CSOS) · ILM580006	Operator's notice page	Annual CSO notice not read
Village of Arlington Heights (Arlington Heights CSOS) · ILM580006	Warning lights or signs	Outfall signs not read
Village of Arlington Heights (Arlington Heights CSOS) · ILM580006	Health department page	Health department notice not read
Village of Brookfield (Brookfield CSOS) · ILM580032	Operator's notice page	Annual CSO notice not read
Village of Brookfield (Brookfield CSOS) · ILM580032	Warning lights or signs	Outfall signs not read
Village of Brookfield (Brookfield CSOS) · ILM580032	Health department page	Health department notice not read
Village of Burnham (Burnham CSOS) · ILM580018	Operator's notice page	Annual CSO notice not read
Village of Burnham (Burnham CSOS) · ILM580018	Warning lights or signs	Outfall signs not read
Village of Burnham (Burnham CSOS) · ILM580018	Health department page	Health department notice not read
Village of Calumet Park (Calumet Park CSOS) · ILM580016	Operator's notice page	Annual CSO notice not read
Village of Calumet Park (Calumet Park CSOS) · ILM580016	Warning lights or signs	Outfall signs not read
Village of Calumet Park (Calumet Park CSOS) · ILM580016	Health department page	Health department notice not read
Village of Des Plaines (Des Plaines CSOS) · ILM580026	Operator's notice page	Annual CSO notice not read
Village of Des Plaines (Des Plaines CSOS) · ILM580026	Warning lights or signs	Outfall signs not read
Village of Des Plaines (Des Plaines CSOS) · ILM580026	Health department page	Health department notice not read
Village of Dixmoor · ILM580011	Operator's notice page	Annual CSO notice not read
Village of Dixmoor · ILM580011	Warning lights or signs	Outfall signs not read
Village of Dixmoor · ILM580011	Health department page	Health department notice not read
Village of Dolton · ILM580017	Operator's notice page	Annual CSO notice not read
Village of Dolton · ILM580017	Warning lights or signs	Outfall signs not read
Village of Dolton · ILM580017	Health department page	Health department notice not read
Village of Forest Park (Forest Park CSOS) · ILM580019	Operator's notice page	Annual CSO notice not read
Village of Forest Park (Forest Park CSOS) · ILM580019	Warning lights or signs	Outfall signs not read
Village of Forest Park (Forest Park CSOS) · ILM580019	Health department page	Health department notice not read
Village of Franklin Park · ILM580029	Operator's notice page	Annual CSO notice not read
Village of Franklin Park · ILM580029	Warning lights or signs	Outfall signs not read
Village of Franklin Park · ILM580029	Health department page	Health department notice not read
Village of Golf (Golf CSOS) · IL0072389	Operator's notice page	Annual CSO notice not read
Village of Golf (Golf CSOS) · IL0072389	Warning lights or signs	Outfall signs not read
Village of Golf (Golf CSOS) · IL0072389	Health department page	Health department notice not read
Village of La Grange (La Grange CSOS) · ILM580009	Operator's notice page	Annual CSO notice not read
Village of La Grange (La Grange CSOS) · ILM580009	Warning lights or signs	Outfall signs not read
Village of La Grange (La Grange CSOS) · ILM580009	Health department page	Health department notice not read
Village of Lagrange Park (Lagrange Park CSOS) · ILM580008	Operator's notice page	Annual CSO notice not read
Village of Lagrange Park (Lagrange Park CSOS) · ILM580008	Warning lights or signs	Outfall signs not read
Village of Lagrange Park (Lagrange Park CSOS) · ILM580008	Health department page	Health department notice not read
Village of Lansing (Lansing CSOS) · ILM580027	Operator's notice page	Annual CSO notice not read
Village of Lansing (Lansing CSOS) · ILM580027	Warning lights or signs	Outfall signs not read
Village of Lansing (Lansing CSOS) · ILM580027	Health department page	Health department notice not read
Village of Lincolnwood (Lincolnwood CSOS) · ILM580034	Operator's notice page	Annual CSO notice not read
Village of Lincolnwood (Lincolnwood CSOS) · ILM580034	Warning lights or signs	Outfall signs not read
Village of Lincolnwood (Lincolnwood CSOS) · ILM580034	Health department page	Health department notice not read
Village of Lyons (Lyons CSOS) · ILM580004	Operator's notice page	Annual CSO notice not read
Village of Lyons (Lyons CSOS) · ILM580004	Warning lights or signs	Outfall signs not read
Village of Lyons (Lyons CSOS) · ILM580004	Health department page	Health department notice not read
Village of Maywood (Maywood CSOS) · ILM580022	Operator's notice page	Annual CSO notice not read
Village of Maywood (Maywood CSOS) · ILM580022	Warning lights or signs	Outfall signs not read
Village of Maywood (Maywood CSOS) · ILM580022	Health department page	Health department notice not read
Village of Melrose Park (Melrose Park CSOS) · ILM580003	Operator's notice page	Annual CSO notice not read
Village of Melrose Park (Melrose Park CSOS) · ILM580003	Warning lights or signs	Outfall signs not read
Village of Melrose Park (Melrose Park CSOS) · ILM580003	Health department page	Health department notice not read
Village of Morton Grove (Morton Grove CSOS) · ILM580005	Operator's notice page	Annual CSO notice not read
Village of Morton Grove (Morton Grove CSOS) · ILM580005	Warning lights or signs	Outfall signs not read
Village of Morton Grove (Morton Grove CSOS) · ILM580005	Health department page	Health department notice not read
Village of Niles (Niles CSOS) · ILM580035	Operator's notice page	Annual CSO notice not read
Village of Niles (Niles CSOS) · ILM580035	Warning lights or signs	Outfall signs not read
Village of Niles (Niles CSOS) · ILM580035	Health department page	Health department notice not read
Village of North Riverside · ILM580030	Operator's notice page	Annual CSO notice not read
Village of North Riverside · ILM580030	Warning lights or signs	Outfall signs not read
Village of North Riverside · ILM580030	Health department page	Health department notice not read
Village of Phoenix (Phoenix CSOS) · IL0072834	Operator's notice page	Annual CSO notice not read
Village of Phoenix (Phoenix CSOS) · IL0072834	Warning lights or signs	Outfall signs not read
Village of Phoenix (Phoenix CSOS) · IL0072834	Health department page	Health department notice not read
Village of Posen (Posen CSOS) · ILM580037	Operator's notice page	Annual CSO notice not read
Village of Posen (Posen CSOS) · ILM580037	Warning lights or signs	Outfall signs not read
Village of Posen (Posen CSOS) · ILM580037	Health department page	Health department notice not read
Village of River Forest (River Forest CSOS) · ILM580024	Operator's notice page	Annual CSO notice not read
Village of River Forest (River Forest CSOS) · ILM580024	Warning lights or signs	Outfall signs not read
Village of River Forest (River Forest CSOS) · ILM580024	Health department page	Health department notice not read
Village of River Grove (River Grove CSOS) · ILM580021	Operator's notice page	Annual CSO notice not read
Village of River Grove (River Grove CSOS) · ILM580021	Warning lights or signs	Outfall signs not read
Village of River Grove (River Grove CSOS) · ILM580021	Health department page	Health department notice not read
Village of Riverdale (Riverdale CSOS) · ILM580007	Operator's notice page	Annual CSO notice not read
Village of Riverdale (Riverdale CSOS) · ILM580007	Warning lights or signs	Outfall signs not read
Village of Riverdale (Riverdale CSOS) · ILM580007	Health department page	Health department notice not read
Village of Riverside (Riverside CSOS) · ILM580015	Operator's notice page	Annual CSO notice not read
Village of Riverside (Riverside CSOS) · ILM580015	Warning lights or signs	Outfall signs not read
Village of Riverside (Riverside CSOS) · ILM580015	Health department page	Health department notice not read
Village of Schiller Park · ILM580013	Operator's notice page	Annual CSO notice not read
Village of Schiller Park · ILM580013	Warning lights or signs	Outfall signs not read
Village of Schiller Park · ILM580013	Health department page	Health department notice not read
Village of Skokie · ILM580036	Operator's notice page	Annual CSO notice not read
Village of Skokie · ILM580036	Warning lights or signs	Outfall signs not read
Village of Skokie · ILM580036	Health department page	Health department notice not read
Village of South Holland (South Holland CSOS) · ILM580010	Operator's notice page	Annual CSO notice not read
Village of South Holland (South Holland CSOS) · ILM580010	Warning lights or signs	Outfall signs not read
Village of South Holland (South Holland CSOS) · ILM580010	Health department page	Health department notice not read
Village of Stickney (Stickney CSOS) · ILM580023	Operator's notice page	Annual CSO notice not read
Village of Stickney (Stickney CSOS) · ILM580023	Warning lights or signs	Outfall signs not read
Village of Stickney (Stickney CSOS) · ILM580023	Health department page	Health department notice not read
Village of Summit (Summit CSOS) · ILM580033	Operator's notice page	Annual CSO notice not read
Village of Summit (Summit CSOS) · ILM580033	Warning lights or signs	Outfall signs not read
Village of Summit (Summit CSOS) · ILM580033	Health department page	Health department notice not read
Village of Wilmette (Wilmette CSOS) · ILM580012	Operator's notice page	Annual CSO notice not read
Village of Wilmette (Wilmette CSOS) · ILM580012	Warning lights or signs	Outfall signs not read
Village of Wilmette (Wilmette CSOS) · ILM580012	Health department page	Health department notice not read

Required by a permit: public-notice channels in this state and what our monitor finds on each
Operator or agency	Channel	What we find
Beardstown Sanitary District · IL0025135	Operator's notice page	CSO public notification not read
Bloomington combined sewer system (Bloomington CSOS) · IL0072001	Operator's notice page	CSO public notification not read
Bloomington Normal Water Reclamation District (Bloomington Normal WRD -West STP) · IL0027731	Operator's notice page	CSO public notification behind a bot check; not read
Christian County WRD · IL0031356	Operator's notice page	CSO public notification not read
City of Aurora · IL0048518	Operator's notice page	CSO public notification not read
City of Belleville · IL0021873	Operator's notice page	CSO public notification not read
City of Blue Island (Blue Island CSOS) · ILM580031	Email list	Email list; not read
City of Cairo · IL0023825	Operator's notice page	CSO public notification not read
City of Calumet City · ILM580025	Email list	Email list; not read
City of Canton · IL0027839	Operator's notice page	CSO public notification not read
City of Carlinville · IL0022675	Operator's notice page	CSO public notification not read
City of Casey · IL0035084	Operator's notice page	CSO public notification not read
City of Charleston · IL0021644	Operator's notice page	CSO public notification not read
City of Chicago (Chicago CSO) · IL0045012	Email list	Email list; not read
City of East St Louis Combined Sewer · IL0033472	Operator's notice page	CSO public notification not read
City of Effingham · IL0028622	Operator's notice page	CSO public notification not read
City of Elgin · IL0070505	Operator's notice page	CSO public notification not read
City of Evanston (Evanston CSOS) · ILM580002	Email list	Email list; not read
City of Fairbury · IL0021601	Operator's notice page	CSO public notification not read
City of Farmer City · IL0022462	Operator's notice page	CSO public notification not read
City of Georgetown · IL0022322	Operator's notice page	CSO public notification not read
City of Gibson City (Wpcf) · IL0023281	Operator's notice page	CSO public notification not read
City of Harvey (Harvey CSOS) · ILM580020	Email list	Email list; not read
City of Havana · IL0023388	Operator's notice page	CSO public notification not read
City of Jacksonville · IL0021661	Operator's notice page	CSO public notification not read
City of Joliet Eastside (Joliet Eastside STP) · IL0022519	Operator's notice page	CSO public notification not read
City of Lasalle · IL0029424	Operator's notice page	CSO public notification not read
City of Leroy · IL0021563	Operator's notice page	CSO public notification not read
City of Lincoln · IL0029564	Operator's notice page	CSO public notification not read
City of Litchfield · IL0020621	Operator's notice page	CSO public notification not read
City of Markham (Markham CSOS) · ILM580028	Email list	Email list; not read
City of Marshall · IL0068365	Operator's notice page	CSO public notification not read
City of Mason City · IL0029815	Operator's notice page	CSO public notification not read
City of Mattoon · IL0029831	Operator's notice page	CSO public notification not read
City of Metropolis · IL0029874	Operator's notice page	CSO public notification not read
City of Minonk · IL0037818	Operator's notice page	CSO public notification not read
City of Momence · IL0022179	Operator's notice page	CSO public notification not read
City of Morris · IL0021113	Operator's notice page	CSO public notification not read
City of Oglesby · IL0024996	Operator's notice page	CSO public notification not read
City of Oregon · IL0020184	Operator's notice page	CSO public notification not read
City of Ottawa · IL0030384	Operator's notice page	CSO public notification not read
City of Paris · IL0021377	Operator's notice page	CSO public notification not read
City of Park Ridge (Park Ridge CSOS) · ILM580014	Email list	Email list; not read
City of Pekin · IL0034495	Operator's notice page	CSO public notification not read
City of Peoria (Peoria CSOS) · IL0037800	Operator's notice page	CSO public notification not read
City of Peru · IL0030660	Operator's notice page	CSO public notification not read
City of Pontiac · IL0030457	Operator's notice page	CSO public notification not read
City of Prophetstown · IL0043061	Operator's notice page	CSO public notification not read
City of Quincy · IL0030503	Operator's notice page	CSO public notification not read
City of Rock Island · IL0030783	Operator's notice page	CSO public notification not read
City of Shelbyville · IL0021890	Operator's notice page	CSO public notification not read
City of Spring Valley · IL0031216	Operator's notice page	CSO public notification not read
City of Streator · IL0022004	Operator's notice page	CSO public notification not read
City of Toluca · IL0021695	Operator's notice page	CSO public notification not read
City of Watseka · IL0022161	Operator's notice page	CSO public notification not read
City of Wenona · IL0021792	Operator's notice page	CSO public notification not read
City of Wood River · IL0031852	Operator's notice page	CSO public notification not read
Fox Metro Water Reclamation District (Fox Metro WRD STP) · IL0020818	Operator's notice page	CSO public notification not read
Fox River Water Reclamation District (Fox River WRD - Albin D Pagorski WRF) · IL0028657	Operator's notice page	CSO public notification not read
Galesburg Sanitary District · IL0023141	Operator's notice page	CSO public notification not read
Glenbard Wastewater Authority · IL0022471	Operator's notice page	CSO public notification not read
Greater Peoria Sanitary And Sewage District · IL0021288	Operator's notice page	CSO public notification not read
Illinois American Water (Alton STP) · IL0027464	Operator's notice page	CSO public notification not read
Illinois American Water Company (Granite City WWTP) · IL0033481	Operator's notice page	CSO public notification not read
Illinois EPA	State alert page	Report to the state not read
Metro East Facility Sanitary District · IL0028592	Operator's notice page	CSO public notification not read
Metro Water Reclamation Distric Of Greater Chicago (MWRDGC Lemont WRP) · IL0028070	Operator's notice page	CSO public notification not read
Metro Water Reclamation District Of Greater Chicago (MWRDGC Calumet WRP) · IL0028061	Email list	Email list; not read
Metro Water Reclamation District Of Greater Chicago (MWRDGC Stickney WRP) · IL0028053	Email list	Email list; not read
Metro Water Reclamation District Of Greater Chicago (MWRDGC Terrence J O'Brien WTR Reclamation Plant) · IL0028088	Email list	Email list; not read
Metropolitan Water Reclamation District of Greater Chicago	Email list	Email list; not read
Metropolitan Water Reclamation District of Greater Chicago	Shared notification site	Links to MWRD's alerts, map and reports only
Metropolitan Water Reclamation District of Greater Chicago	Shared notification site	Read as a feed
Metropolitan Water Reclamation District Of Greater Chicago (MWRDGC- James Kirie WRP) · IL0047741	Email list	Email list; not read
Monmouth Main STP · IL0021253	Operator's notice page	CSO public notification not read
Sangamon County Water Rec District (Spring Creek STP) · IL0021989	Operator's notice page	CSO public notification not read
Sangamon County Water Reclamation District · IL0021971	Operator's notice page	CSO public notification not read
Sanitary District Of Decatur · IL0028321	Operator's notice page	CSO public notification not read
Village of Addison (A.J. Larocca Wastewater Treatment Facility) · IL0027367	Operator's notice page	CSO public notification not read
Village of Arlington Heights (Arlington Heights CSOS) · ILM580006	Operator's notice page	Notification page unchanged since Nov 4, 2026
Village of Arlington Heights (Arlington Heights CSOS) · ILM580006	Email list	Email list; not read
Village of Brookfield (Brookfield CSOS) · ILM580032	Email list	Email list; not read
Village of Bureau Junction · IL0033120	Operator's notice page	CSO public notification not read
Village of Burnham (Burnham CSOS) · ILM580018	Email list	Email list; not read
Village of Calumet Park (Calumet Park CSOS) · ILM580016	Email list	Email list; not read
Village of Cowden · IL0028231	Operator's notice page	CSO public notification not read
Village of Des Plaines (Des Plaines CSOS) · ILM580026	Email list	Email list; not read
Village of Dixmoor · ILM580011	Email list	Email list; not read
Village of Dolton · ILM580017	Email list	Email list; not read
Village of Forest Park (Forest Park CSOS) · ILM580019	Email list	Email list; not read
Village of Forest View · IL0020800	Operator's notice page	CSO public notification not read
Village of Franklin Park · ILM580029	Email list	Email list; not read
Village of Golf (Golf CSOS) · IL0072389	Email list	Email list; not read
Village of Granville · IL0022331	Operator's notice page	CSO public notification not read
Village of Hartford CSO Outfall · IL0021423	Operator's notice page	CSO public notification not read
Village of La Grange (La Grange CSOS) · ILM580009	Email list	Email list; not read
Village of Lagrange Park (Lagrange Park CSOS) · ILM580008	Email list	Email list; not read
Village of Lansing (Lansing CSOS) · ILM580027	Email list	Email list; not read
Village of Lemont · IL0039551	Operator's notice page	CSO public notification not read
Village of Lincolnwood (Lincolnwood CSOS) · ILM580034	Email list	Email list; not read
Village of Lyons (Lyons CSOS) · ILM580004	Email list	Email list; not read
Village of Maywood (Maywood CSOS) · ILM580022	Email list	Email list; not read
Village of Melrose Park (Melrose Park CSOS) · ILM580003	Email list	Email list; not read
Village of Milford · IL0023272	Operator's notice page	CSO public notification not read
Village of Morton · IL0030015	Operator's notice page	CSO public notification not read
Village of Morton Grove (Morton Grove CSOS) · ILM580005	Email list	Email list; not read
Village of Niles (Niles CSOS) · ILM580035	Email list	Email list; not read
Village of North Riverside · ILM580030	Email list	Email list; not read
Village of Phoenix (Phoenix CSOS) · IL0072834	Email list	Email list; not read
Village of Posen (Posen CSOS) · ILM580037	Email list	Email list; not read
Village of Rankin · IL0021709	Operator's notice page	CSO public notification not read
Village of River Forest (River Forest CSOS) · ILM580024	Email list	Email list; not read
Village of River Grove (River Grove CSOS) · ILM580021	Email list	Email list; not read
Village of Riverdale (Riverdale CSOS) · ILM580007	Email list	Email list; not read
Village of Riverside (Riverside CSOS) · ILM580015	Email list	Email list; not read
Village of Sauget (Sauget-Abrtf) · IL0065145	Operator's notice page	CSO public notification not read
Village of Schiller Park · ILM580013	Email list	Email list; not read
Village of Skokie · ILM580036	Email list	Email list; not read
Village of South Holland (South Holland CSOS) · ILM580010	Email list	Email list; not read
Village of Stickney (Stickney CSOS) · ILM580023	Email list	Email list; not read
Village of Summit (Summit CSOS) · ILM580033	Email list	Email list; not read
Village of Villa Park (Villa Park Wet Weather STP) · IL0033618	Operator's notice page	CSO public notification not read
Village of Western Springs · IL0045039	Operator's notice page	CSO public notification not read
Village of Wilmette (Wilmette CSOS) · ILM580012	Email list	Email list; not read

Voluntary: public-notice channels in this state and what our monitor finds on each
Operator or agency	Channel	What we find
Chicago Park District	Data feed	Voluntary page unchanged since Nov 4, 2026
City of Chicago (Chicago CSO) · IL0045012	Warning lights or signs	Warning lights not read
Friends of the Chicago River	Shared results page	Voluntary page unchanged since Nov 4, 2026
Illinois EPA (harmful algal bloom program)	State alert page	Voluntary page unchanged since Nov 4, 2026
Lake County Health Department	Health department page	Voluntary page behind a bot check; not read
Metropolitan Water Reclamation District of Greater Chicago	Shared notification site	Voluntary page behind a bot check; not read
Metropolitan Water Reclamation District of Greater Chicago	Shared notification site	Voluntary page unchanged since Nov 4, 2026
Metropolitan Water Reclamation District of Greater Chicago	Shared notification site	Read as a feed
Metropolitan Water Reclamation District of Greater Chicago	Shared notification site	Voluntary page not read
Swim Drink Fish	Swim Guide listing	Swim Guide listing shown only in a script app; not read
U.S. Environmental Protection Agency (ECHO)	Data feed	Read as a feed

Source: DirtyWaterWatch register of public-notice channels and its page monitor, checked 2026-11-06 08:45 UTC.

How each state reports

Map sources: water outlines and launches from OpenBoatLaunch and OpenStreetMap contributors (Open Database License); wastewater outlets from EPA and state records; downstream estimates by DirtyWaterWatch using U.S. Geological Survey maps and flow data. Base map: OpenFreeMap and OpenMapTiles.

Zoom in to see the wastewater outlets: solid dots are combined sewer outfalls, ringed dots treatment plant outfalls, small hollow diamonds places named in overflow reports (provisional) and grey dots closed outfalls. A yellow ring with a dashed edge means discharge likely or possible: heavy rain, no report received.

Discharge or advisory reported 5 waters

Deep Lake (1)Dunns Lake (1)Evergreen Lake (1)McCullom Lake (1)Wooster Lake (1)

Caution 68 waters

Addison Creek (0)Allforks Creek (0)Big Creek (1)Briar Creek (38)Cahokia Canal (0)Calumet River (0)Calumet Sag Channel (0)Calumet Union Drainage Ditch (0)Cassell Creek (0)Cedar Creek (0)Chain of Rocks Canal (1)Chicago River (0)Chicago Sanitary and Ship Canal (0)Curtis Creek (2)Deer Creek (2)Des Plaines River (5)Drummer Creek (0)East Arm Little Calumet River (0)East Branch Du Page River (1)Embarras River (11)Feehanville Ditch (0)Flag Creek (1)Fox River (7)Grand Calumet River (0)Illinois and Michigan Canal (0)Illinois River (136)Indian Creek (0)Iroquois River (0)Kankakee River (1)Kaskaskia River (3)Kickapoo Creek (0)Little Calumet River (0)Little Vermilion River (0)Long Point Creek (0)Macoupin Creek (0)Mauvaise Terre Creek (0)Mississippi River (94)Nettle Creek (4)North Branch Chicago River (1)North Branch Crow Creek (1)North Fork Salt Creek (0)North Shore Channel (0)Panther Creek (3)Peoria Lake (0)Prairie Creek (0)Prairie Creek (0)Quarry Branch (1)Richland Creek (29)Robinson Creek (0)Rock River (11)Salt Creek (17)Salt Creek (0)Salt Creek (0)Sandy Creek (0)Sangamon River (1)Shoal Creek (0)South Branch Chicago River (0)Spring Creek (3)Spring Creek (0)Spring Lake (0)Sugar Creek (0)Sugar Creek (0)Sugar Creek (0)Sugar Creek (0)Vermilion River (0)Weller Creek (0)West Fork North Branch Chicago River (0)West Fork Shoal Creek (0)

No current status shown 356 waters

Ackerman Creek (0)Apple Creek (0)Apple River (2)Asa Creek (0)Aux Sable Creek (0)Auxier Creek (0)Bailey Creek (0)Baptist Creek (0)Bay Creek (1)Beach Creek (0)Bear Creek (3)Bear Creek (0)Bear Creek (0)Bearcat Creek (0)Beaucoup Creek (3)Beaver Creek (0)Beaver Creek (3)Big Branch (0)Big Four Ditch (0)Big George Branch (0)Big Hollow Creek (1)Big Muddy River (5)Big Rock Creek (0)Big Sandy Creek (0)Big Slough (0)Black Creek (0)Black Walnut Creek (0)Bluegrass Creek (0)Bonpas Creek (0)Branch Creek (0)Bronson Creek (0)Brush Creek (0)Brushy Creek (0)Buck Creek (0)Buck Creek (0)Buckhart Creek (0)Buffalo Creek (0)Butler Branch (0)Butter Creek (0)Butterfield Creek (0)Cache River (0)Cahokia Creek (1)Cahokia Diversion Channel (0)Camp Creek (3)Camp Creek (0)Cana Creek (0)Cane Creek (0)Canteen Creek (2)Carroll Creek (0)Casey Fork (0)Cedar Creek (0)Cedar Creek (0)Clary Creek (0)Claypool Ditch (0)Clear Creek (0)Clear Creek (0)Coal Creek (0)Coal Creek (0)Coffee Creek (0)Collier Creek (0)Coolidge Creek (0)Coon Creek (0)Coop Branch (0)Coopers Defeat Creek (0)Copper Slough (0)Copperas Creek (0)Cottonwood Creek (0)Cox Creek (0)Crab Orchard Creek (1)Crane Creek (0)Crooked Creek (0)Cross Lake (1)Crystal Lake Outlet (0)Cypress Creek (0)Diamond Lake (1)Dieterich Creek (1)Dixson Creek (0)Douglas Creek (0)Doza Creek (0)Drowning Fork (5)Dry Run (0)Du Page River (0)Dutch Creek (0)Dutch Creek (0)East Branch Horse Creek (0)East Branch Panther Creek (0)East Fork La Moine River (0)East Fork Otter Creek (0)East Fork Shoal Creek (1)Edwards River (0)Elkhorn Creek (0)Elliott Creek (0)Emery Creek (2)Engle Creek (2)Fall Creek (0)Farm Creek (5)Fiddyment Creek (0)Figley Branch (0)Flat Branch (0)Flat Branch (0)Flint Creek (3)Forman Creek (0)Fountain Creek (1)Franklin Creek (1)French Creek (0)Fulton Branch (0)Galena River (0)Gallett Creek (0)Gassaway Branch (0)Gerhardt Creek (0)Ginseng Creek (0)Goose Creek (1)Gooseberry Creek (0)Gowdy Creek (0)Grand Point Creek (0)Grape Creek (4)Grassy Branch (0)Green River (0)Grindstone Creek (0)Hackett Branch (0)Hadley Creek (0)Harris Branch (0)Hastings Creek (0)Haw Creek (0)Hayes Branch (0)Hickory Creek (5)Hickory Creek (0)Higgins Creek (1)Hodges Creek (0)Hog Branch (0)Hog Run Creek (0)Horse Creek (0)Horse Creek (0)Hosick Creek (0)Hurricane Creek (0)Hurricane Creek (0)Indian Creek (0)Indian Creek (0)Indian Creek (1)Indian Creek (0)Indian Creek (0)Jackson Branch (0)Jackson Creek (0)Jake Creek (0)Johnny Run (0)Johnson Creek (0)Johnson Run (0)Jordan Creek (0)Kentucky Creek (0)Kickapoo Creek (0)Kickapoo Creek (0)Kinney Branch (2)Kiser Creek (0)Kishwaukee River (0)Kyte River (4)Lake Branch (0)Lake Creek (0)Lake Michigan (57)Lake Shelbyville (0)Lamotte Creek (0)Lanes Branch (1)Leaf River (0)Lick Branch (1)Lick Creek (1)Lick Creek (0)Lily Cache Creek (1)Lime Creek (0)Link Branch (0)Little Beaver Creek (0)Little Blue Creek (0)Little Cache Creek (0)Little Coal Creek (0)Little Creek (0)Little Creek (0)Little Crooked Creek (0)Little Dry Fork (0)Little Indian Creek (0)Little Kickapoo Creek (0)Little Mud Creek (0)Little Muddy River (0)Little Ninemile Creek (0)Little Rock Creek (0)Little Sandy Creek (0)Little Silver Creek (19)Little Vermilion River (1)Little Wabash River (1)Littlers Creek (0)Long Branch (0)Long Point Slough (0)Loop Creek (1)Lost Creek (0)Mackinaw River (2)Mad River (0)Maeystown Creek (0)Marrowbone Creek (0)Martin Creek (0)Marys River (3)Maxwell Creek (1)Mazon River (0)McCraney Creek (0)Mendota Creek (0)Middle Fork Big Muddy River (0)Middle Fork Saline River (0)Middle Fork Shoal Creek (0)Middle Henderson Creek (1)Mill Creek (0)Mill Creek (0)Mill Creek (0)Mill Creek (0)Mill Creek (0)Mill Creek (0)Miller Creek (1)Mitchell Creek (0)Mokeler Creek (0)Mosquito Creek (0)Mosquito Creek (0)Mud Creek (0)Mud Creek (0)Mud Run (1)Mud Run (0)Mundinger Creek (0)Nashville Creek (0)Nassa Creek (0)Negro Hollow Creek (1)Nickolson Creek (0)Nippersink Creek (0)North Branch Nippersink Creek (0)North Branch Otter Creek (0)North Creek (0)North Creek (0)North Fork Cox Creek (0)North Fork East Fork Kaskaskia River (0)North Fork Saline River (0)North Fork Vermilion River (0)Ohio River (4)Otter Creek (0)Owl Creek (2)Panther Creek (0)Partridge Creek (0)Paw Paw Run (0)Pecatonica River (1)Phils Creek (3)Pike Creek (0)Pike Run (0)Pilot Creek (0)Pipestone Creek (0)Plum Creek (0)Plum Creek (1)Pond Creek (0)Pope Creek (0)Post Creek Cutoff (0)Powdermill Creek (25)Prairie Creek (1)Prairie du Rocher Creek (0)Pulaski Slough (0)Queens Lake Branch (0)Raccoon Creek (0)Ramsey Branch (1)Ramsey Creek (0)Rattlesnake Creek (0)Rayse Creek (0)Rend Lake (0)Richland Creek (0)Richland Creek (0)Rock Creek (0)Rock Run (0)Rock Run (0)Rocky Fork (5)Rubicon Creek (0)Russett Branch (0)Saint Joseph Creek (2)Salt Fork (0)Samuels Ditch (0)Sand Creek (0)Sandy Creek (8)Saratoga Creek (0)Scattering Fork (0)Schneider Springs Branch (0)Section Creek (0)Seminary Creek (5)Seminary Creek (0)Seminary Fork (0)Sequoit Creek (0)Shaw Creek (0)Shearles Branch (0)Shelton Creek (0)Shirley Creek (1)Shoal Creek (0)Short Point Creek (0)Shuhart Creek (0)Silver Creek (0)Skillet Fork (0)Skokie River (0)Skunk Creek (0)Snag Creek (0)Solomon Creek (0)Somonauk Creek (0)South Branch Kishwaukee River (5)South Branch La Moine River (2)South Fork McKee Creek (0)South Fork Saline River (0)South Fork Sangamon River (1)South Fork Shaw Creek (0)South Henderson Creek (0)Spoon Creek (0)Spring Brook (2)Spring Creek (0)Spring Point Creek (0)Stillman Creek (0)Stoney Creek (3)Stony Creek (0)Sugar Creek (0)Sugar Creek (0)Sugar Creek (0)Sugar Creek (0)Thenius Creek (0)Thorn Creek (0)Thunder Creek (0)Tiber Creek (0)Timber Creek (0)Town Branch (0)Town Branch (0)Town Branch (1)Town Creek (3)Town Fork (0)Trim Creek (1)Troublesome Creek (0)Turkey Creek (0)Turkey Creek (0)Tyler Creek (1)Unnamed tributary to Copperas Creek (0)Ursa Creek (0)Vermilion River (0)Wabash River (5)Walnut Creek (0)Walnut Creek (0)Walnut Fork (0)Welch Creek (0)West Branch Du Page River (0)West Branch Panther Creek (0)West Creek (0)West Fork Cahokia Creek (0)West Fork Kickapoo Creek (0)West Fork Spoon River (1)West Fork Sugar Creek (0)West Fork Wood River (0)West Okaw River (0)Williams Creek (0)Winneshiek Creek (0)Wolf Creek (0)Wolf Creek (0)Wolf Creek (0)Wolf Creek (0)Wolf Run (0)Wood River (0)Yellow Creek (0)

Sewer operators

Get local alerts from a sewer operator: open its page for its public alert link.

849 sewer operators; the list appears as you scroll.

What this page covers

Post-discharge periods and their sources

No period: a water is red only while the discharge is reported ongoing. Combined sewer operators in the Lake Michigan basin, the City of Chicago, the Metropolitan Water Reclamation District of Greater Chicago and the suburbs of Cook County, must notify the public electronically within 4 hours of becoming aware of an overflow, post signs at outfalls and public access areas and tell the local health department (40 CFR 122.38); the District sends these notices by e-mail and text and shows possible overflows on a daily map. Other combined sewer operators notify the public under their permits. This site marks a reported discharge while it runs and applies its own caution after it ends

Source: 40 CFR 122.38; 40 CFR 122.41(l)(6); NPDES permit public notification conditions (Nine Minimum Controls no. 8); MWRD permits IL0028053 and IL0028061, Special Condition 13.14; Illinois EPA sanitary sewer overflow form. DirtyWaterWatch applies the period described here.

Illinois's period on the methods page · How long each status lasts, in every state

Sources checked automatically

Illinois BeachGuard System (IDPH): advisories and closures, E. coli results · we expect a successful check at least every 24 hours · last successful check 2026-11-06 08:41 UTC
MWRD "Possible CSO Events" live map layer · we expect a successful check at least every 1 hour · last successful check 2026-11-06 08:41 UTC
MWRD Lake Michigan reversals table (1985 to present) · we expect a successful check at least every 24 hours · last successful check 2026-11-06 08:41 UTC

7 other public sources for Illinois are listed on the Sources page.

The last 90 days in Illinois

Last 90 days, hour by hour. Red: discharge or advisory reported. Amber: caution. Hatched amber: end not confirmed. Plum: algal bloom advisory. Red or amber with a light line inside: beach advisory or caution. Dotted: monthly report (days with discharge, dates not given). Grey: no current status on the water outline. Purple hatching: a status resting on a source that could not be checked on schedule.

Sewage discharges: 41 periods

Discharge likely or possible: heavy rain, no report received: Nov 4, 2026, 2:00 AM EST to the latest update
Radar estimate, no report received: heavy rain at the outlets of Beardstown Sanitary District, Bloomington combined sewer system, Bloomington Normal Water Reclamation District, Christian County WRD, City of Aurora, City of Belleville, and 105 more sewer operators
Caution: Oct 30, 2026, 3:00 AM EDT to Nov 2, 2026, 2:00 AM EST
1 report: City of Wood River on Mississippi River 1
Show records

The records are also in the report table on this page.
Discharge or advisory reported: Oct 30, 2026, 2:00 AM EDT to Oct 30, 2026, 3:00 AM EDT
1 report: City of Wood River on Mississippi River 1
Show records

The records are also in the report table on this page.
Caution: Oct 22, 2026, 5:00 AM EDT to Oct 25, 2026, 5:00 AM EDT
2 reports: City of Mount Carmel on Wabash River 2
Show records

The records are also in the report table on this page.
Discharge or advisory reported: Oct 22, 2026, 12:00 AM EDT to Oct 22, 2026, 5:00 AM EDT
2 reports: City of Mount Carmel on Wabash River 2
Show records

The records are also in the report table on this page.
Caution: Oct 17, 2026, 2:00 AM EDT to Oct 20, 2026, 2:00 AM EDT
4 reports: City of Wood River on Mississippi River 3, City of Lawrenceville on Embarras River 1
Show records

The records are also in the report table on this page.
Discharge or advisory reported: Oct 17, 2026, 12:00 AM EDT to Oct 17, 2026, 2:00 AM EDT
1 report: City of Wood River on Mississippi River 1
Show records

The records are also in the report table on this page.
Caution: Oct 16, 2026, 1:00 PM EDT to Oct 17, 2026, 12:00 AM EDT
3 reports: City of Wood River on Mississippi River 2, City of Lawrenceville on Embarras River 1
Show records

The records are also in the report table on this page.
Discharge or advisory reported: Oct 16, 2026, 10:00 AM EDT to Oct 16, 2026, 1:00 PM EDT
1 report: City of Lawrenceville on Embarras River 1
Show records

The records are also in the report table on this page.
Caution: Oct 15, 2026, 7:00 PM EDT to Oct 16, 2026, 10:00 AM EDT
2 reports: City of Wood River on Mississippi River 2
Show records

The records are also in the report table on this page.

31 earlier periods appear as you scroll.

Beach advisories: 1 period

Beach advisory: Aug 8, 2026, 6:00 AM EDT to the latest update
5 reports: Illinois Department of Public Health (Illinois BeachGuard System) on Evergreen Lake 1, Lake County Health Department (Illinois BeachGuard System) on Deep Lake 1, Lake County Health Department (Illinois BeachGuard System) on Wooster Lake 1, Lake County Health Department (Illinois BeachGuard System) on Dunns Lake 1, McHenry County Health Department (Illinois BeachGuard System) on McCullom Lake 1
Show records

The records are also in the report table on this page.

Source: DirtyWaterWatch calculations using the reports named above and the published status rules. Updated 2026-11-06 09:03 UTC.

Reported discharges in Illinois over time

Discharges affecting Illinois waters, last 12 months388388 affecting Illinois waters: 388 reported by Illinois operators, none arriving from upstreamDecember 2025 to November 2026Verified reports where available, else notices; revisions and duplicates counted once. Arriving discharges are estimated from modeled downstream reaches.
Days with a discharge affecting Illinois waters, last 12 months190Reported by Illinois operators: 190 · Arriving from other states, estimated: 0 (counted apart; together they need not equal the total)December 2025 to November 2026A day counts once however many discharges were under way on it.
Hours with a discharge or advisory status on at least one Illinois water, last 12 months3,159Reported by Illinois operators: 3,159 · Arriving from other states, estimated: 0December 2025 to November 2026Red hours by the map's rules: each discharge to its reported end plus the state's post-discharge period; overlapping hours count once.
2023 season with a discharge or advisory status (Illinois waters)1.6%May to October 2023; incomplete source coverageShare of May 1 to October 31 hours with red status by the map's rules, of the hours a source covered.

Combined sewer overflow (CSO): sewage mixed with rainwater spills from a shared sewer system. Sanitary sewer overflow (SSO): sewage spills from a sewer meant to carry sewage separately from rainwater. Treatment bypass: wastewater skips one or more treatment steps. Blended discharge: wastewater that skipped some treatment is mixed with treated wastewater. Outfall: a pipe or outlet where wastewater enters a water body.

Reported discharges per month

732 reported discharges, January 2022 to November 2026.

Combined sewer overflow
Sanitary sewer overflow
Treatment bypass, blended or other
Incomplete source coverage

The U.S. Environmental Protection Agency's sewer overflow records are limited: they hold only what operators file with the agency.

Sources: U.S. Environmental Protection Agency sewer overflow records; il-mwrd-lake-michigan-reversals. Records cover January 1, 2022 to November 6, 2026.

Show table

Reported discharges per month
Month	Combined sewer overflow	Sanitary sewer overflow	Treatment bypass, blended or other	Total	Counted from	Coverage
January 2022	0	0	0	0
February 2022	0	0	0	0
March 2022	0	0	0	0
April 2022	0	0	0	0
May 2022	0	0	0	0
June 2022	0	0	0	0
July 2022	0	0	0	0
August 2022	0	0	0	0
September 2022	0	0	0	0
October 2022	0	0	0	0
November 2022	0	0	0	0
December 2022	0	0	0	0
January 2023	0	0	0	0
February 2023	0	0	0	0
March 2023	0	0	0	0
April 2023	0	0	0	0
May 2023	0	0	0	0
June 2023	0	0	0	0
July 2023	2	0	0	2	Source records	Incomplete source coverage
August 2023	0	0	0	0		Incomplete source coverage
September 2023	0	0	0	0		Incomplete source coverage
October 2023	0	0	0	0		Incomplete source coverage
November 2023	0	0	0	0		Incomplete source coverage
December 2023	0	0	0	0		Incomplete source coverage
January 2024	0	0	0	0		Incomplete source coverage
February 2024	0	0	0	0		Incomplete source coverage
March 2024	0	0	0	0		Incomplete source coverage
April 2024	0	0	0	0		Incomplete source coverage
May 2024	0	0	0	0		Incomplete source coverage
June 2024	0	0	0	0		Incomplete source coverage
July 2024	0	0	0	0		Incomplete source coverage
August 2024	0	0	0	0		Incomplete source coverage
September 2024	0	0	0	0		Incomplete source coverage
October 2024	0	0	0	0		Incomplete source coverage
November 2024	0	6	4	10	Source records	Incomplete source coverage
December 2024	6	4	2	12	Source records	Incomplete source coverage
January 2025	4	4	1	9	Source records	Incomplete source coverage
February 2025	4	4	1	9	Source records	Incomplete source coverage
March 2025	17	11	0	28	Source records	Incomplete source coverage
April 2025	21	61	21	103	Source records	Incomplete source coverage
May 2025	18	12	4	34	Source records	Incomplete source coverage
June 2025	17	10	2	29	Source records	Incomplete source coverage
July 2025	25	31	5	61	Source records	Incomplete source coverage
August 2025	5	8	0	13	Source records	Incomplete source coverage
September 2025	3	2	0	5	Source records	Incomplete source coverage
October 2025	14	8	0	22	Source records	Incomplete source coverage
November 2025	7	0	0	7	Source records	Incomplete source coverage
December 2025	7	4	2	13	Source records	Incomplete source coverage
January 2026	4	9	3	16	Source records	Incomplete source coverage
February 2026	2	4	0	6	Source records	Incomplete source coverage
March 2026	38	17	4	59	Source records	Incomplete source coverage
April 2026	40	24	6	70	Source records	Incomplete source coverage
May 2026	15	5	4	24	Source records	Incomplete source coverage
June 2026	39	30	3	72	Source records	Incomplete source coverage
July 2026	9	23	0	32	Source records	Incomplete source coverage
August 2026	20	28	6	54	Source records	Incomplete source coverage
September 2026	8	11	4	23	Source records	Incomplete source coverage
October 2026	5	14	0	19	Source records	Incomplete source coverage
November 2026	0	0	0	0		Incomplete source coverage

Hours with a discharge or advisory status per month

Hours when at least one water in the state had a discharge or advisory status under DirtyWaterWatch rules.

Discharge or advisory reported
Incomplete source coverage

1 discharge report has no end time and is not marked ongoing; under DirtyWaterWatch rules it shows caution, not a discharge or advisory status, and adds no hours here. 2 discharges reported to last more than 31 days are counted as 31 days. Official beach and cyanobacteria (harmful blue-green algae) advisories are counted on water pages only. The U.S. Environmental Protection Agency's sewer overflow records are limited: they hold only what operators file with the agency.

Sources: U.S. Environmental Protection Agency sewer overflow records; il-mwrd-lake-michigan-reversals. Records cover March 4, 1985 to November 6, 2026.

Show table

Hours with a discharge or advisory status per month
Month	Hours with a discharge or advisory status	Hours from post-discharge periods	Hours in the month	Coverage
January 2022	0	0	744
February 2022	0	0	672
March 2022	0	0	744
April 2022	0	0	720
May 2022	0	0	744
June 2022	0	0	720
July 2022	0	0	744
August 2022	0	0	744
September 2022	0	0	720
October 2022	0	0	744
November 2022	0	0	720
December 2022	0	0	744
January 2023	0	0	744
February 2023	0	0	672
March 2023	0	0	744
April 2023	0	0	720
May 2023	0	0	744
June 2023	0	0	720
July 2023	48	48	744	Incomplete source coverage
August 2023	0	0	744	Incomplete source coverage
September 2023	0	0	720	Incomplete source coverage
October 2023	0	0	744	Incomplete source coverage
November 2023	0	0	720	Incomplete source coverage
December 2023	0	0	744	Incomplete source coverage
January 2024	0	0	744	Incomplete source coverage
February 2024	0	0	696	Incomplete source coverage
March 2024	0	0	744	Incomplete source coverage
April 2024	0	0	720	Incomplete source coverage
May 2024	0	0	744	Incomplete source coverage
June 2024	0	0	720	Incomplete source coverage
July 2024	0	0	744	Incomplete source coverage
August 2024	0	0	744	Incomplete source coverage
September 2024	0	0	720	Incomplete source coverage
October 2024	0	0	744	Incomplete source coverage
November 2024	156	156	720	Incomplete source coverage
December 2024	204	204	744	Incomplete source coverage
January 2025	744	744	744	Incomplete source coverage
February 2025	274	274	672	Incomplete source coverage
March 2025	537	537	744	Incomplete source coverage
April 2025	720	720	720	Incomplete source coverage
May 2025	649	649	744	Incomplete source coverage
June 2025	605	605	720	Incomplete source coverage
July 2025	435	435	744	Incomplete source coverage
August 2025	236	236	744	Incomplete source coverage
September 2025	53	53	720	Incomplete source coverage
October 2025	199	199	744	Incomplete source coverage
November 2025	71	71	720	Incomplete source coverage
December 2025	55	55	744	Incomplete source coverage
January 2026	63	63	744	Incomplete source coverage
February 2026	39	39	672	Incomplete source coverage
March 2026	371	371	744	Incomplete source coverage
April 2026	612	612	720	Incomplete source coverage
May 2026	468	468	744	Incomplete source coverage
June 2026	483	483	720	Incomplete source coverage
July 2026	274	274	744	Incomplete source coverage
August 2026	580	580	744	Incomplete source coverage
September 2026	154	154	720	Incomplete source coverage
October 2026	61	61	744	Incomplete source coverage
November 2026	0	0	125	Incomplete source coverage

Days with a reported discharge per month

A day counts when any counted discharge was under way on it, from its start to its reported end in Eastern Time; a report with no end counts its start day.

Incomplete source coverage

Sources: U.S. Environmental Protection Agency sewer overflow records; il-mwrd-lake-michigan-reversals. Records cover January 1, 2022 to November 6, 2026.

Show table

Days with a reported discharge per month
Month	Days with a reported discharge	Coverage
January 2022	0
February 2022	0
March 2022	0
April 2022	0
May 2022	0
June 2022	0
July 2022	0
August 2022	0
September 2022	0
October 2022	0
November 2022	0
December 2022	0
January 2023	0
February 2023	0
March 2023	0
April 2023	0
May 2023	0
June 2023	0
July 2023	1	Incomplete source coverage
August 2023	0	Incomplete source coverage
September 2023	0	Incomplete source coverage
October 2023	0	Incomplete source coverage
November 2023	0	Incomplete source coverage
December 2023	0	Incomplete source coverage
January 2024	0	Incomplete source coverage
February 2024	0	Incomplete source coverage
March 2024	0	Incomplete source coverage
April 2024	0	Incomplete source coverage
May 2024	0	Incomplete source coverage
June 2024	0	Incomplete source coverage
July 2024	0	Incomplete source coverage
August 2024	0	Incomplete source coverage
September 2024	0	Incomplete source coverage
October 2024	0	Incomplete source coverage
November 2024	10	Incomplete source coverage
December 2024	11	Incomplete source coverage
January 2025	31	Incomplete source coverage
February 2025	17	Incomplete source coverage
March 2025	26	Incomplete source coverage
April 2025	29	Incomplete source coverage
May 2025	29	Incomplete source coverage
June 2025	27	Incomplete source coverage
July 2025	26	Incomplete source coverage
August 2025	15	Incomplete source coverage
September 2025	5	Incomplete source coverage
October 2025	13	Incomplete source coverage
November 2025	7	Incomplete source coverage
December 2025	9	Incomplete source coverage
January 2026	9	Incomplete source coverage
February 2026	5	Incomplete source coverage
March 2026	22	Incomplete source coverage
April 2026	27	Incomplete source coverage
May 2026	22	Incomplete source coverage
June 2026	25	Incomplete source coverage
July 2026	23	Incomplete source coverage
August 2026	27	Incomplete source coverage
September 2026	11	Incomplete source coverage
October 2026	10	Incomplete source coverage
November 2026	0	Incomplete source coverage

Reported discharges per year, 2000 to 2026

766 reported discharges, 2000 to 2026.

Combined sewer overflow
Sanitary sewer overflow
Treatment bypass, blended or other
Incomplete source coverage

The U.S. Environmental Protection Agency's sewer overflow records are limited: they hold only what operators file with the agency.

Sources: U.S. Environmental Protection Agency sewer overflow records; il-mwrd-lake-michigan-reversals. Records cover March 4, 1985 to November 6, 2026.

Show table

Reported discharges per year, 2000 to 2026
Year	Combined sewer overflow	Sanitary sewer overflow	Treatment bypass, blended or other	Total	Coverage
2000	0	0	0	0
2001	4	0	0	4
2002	2	0	0	2
2003	0	0	0	0
2004	0	0	0	0
2005	0	0	0	0
2006	0	0	0	0
2007	1	0	0	1
2008	4	0	0	4
2009	3	0	0	3
2010	2	0	0	2
2011	3	0	0	3
2012	0	0	0	0
2013	3	0	0	3
2014	2	0	0	2
2015	2	0	0	2
2016	1	0	0	1
2017	3	0	0	3
2018	0	0	0	0
2019	1	0	0	1
2020	3	0	0	3
2021	0	0	0	0
2022	0	0	0	0
2023	2	0	0	2	Incomplete source coverage
2024	6	10	6	22	Incomplete source coverage
2025	142	155	36	333	Incomplete source coverage
2026	180	165	30	375	Incomplete source coverage

Reported volume per year

Gallons (axis: K thousand, M million), summed from the 713 reports that gave a volume as a number (53 did not).

Incomplete source coverage

53 of 766 discharge reports gave no volume as a number; only numbers are summed. 3 reports give more than 5 billion gallons for a single discharge, which looks like an entry error; they are not summed.

Sources: U.S. Environmental Protection Agency sewer overflow records; il-mwrd-lake-michigan-reversals. Records cover March 4, 1985 to November 6, 2026.

Show table

Reported volume per year
Year	Reported volume, gallons	Reports with a volume	Reports without a volume	Coverage
2000	0	0	0
2001	1,189,000,000	4	0
2002	1,751,800,000	2	0
2003	0	0	0
2004	0	0	0
2005	0	0	0
2006	0	0	0
2007	224,000,000	1	0
2008	6,071,700,000	3	1
2009	413,600,000	3	0
2010	750,300,000	1	1
2011	2,327,500,000	3	0
2012	0	0	0
2013	4,614,800,000	2	1
2014	525,000,000	2	0
2015	1,164,700,000	2	0
2016	34,000,000	1	0
2017	2,765,500,000	3	0
2018	0	0	0
2019	54,500,000	1	0
2020	2,548,400,000	3	0
2021	0	0	0
2022	0	0	0
2023	1,142,600,000	2	0	Incomplete source coverage
2024	159,892,731	17	5	Incomplete source coverage
2025	2,506,819,734	320	13	Incomplete source coverage
2026	1,276,581,889	343	32	Incomplete source coverage

Hours with a discharge or advisory status per year

Hours with a discharge or advisory status each year under DirtyWaterWatch rules; 2026 to date.

Discharge or advisory reported
Incomplete source coverage

Sources: U.S. Environmental Protection Agency sewer overflow records; il-mwrd-lake-michigan-reversals. Records cover March 4, 1985 to November 6, 2026.

Show table

Hours with a discharge or advisory status per year
Year	Hours with a discharge or advisory status	Share of the year	Coverage
2000	0	0.0%
2001	72	0.8%
2002	24	0.3%
2003	0	0.0%
2004	0	0.0%
2005	0	0.0%
2006	0	0.0%
2007	48	0.5%
2008	144	1.6%
2009	95	1.1%
2010	24	0.3%
2011	48	0.5%
2012	0	0.0%
2013	48	0.5%
2014	48	0.5%
2015	48	0.5%
2016	24	0.3%
2017	96	1.1%
2018	0	0.0%
2019	24	0.3%
2020	72	0.8%
2021	0	0.0%
2022	0	0.0%
2023	48	0.5%	Incomplete source coverage
2024	359	4.1%	Incomplete source coverage
2025	4,579	52.3%	Incomplete source coverage
2026	3,105	41.8%	Incomplete source coverage

Share of the May to October season with a discharge or advisory status

Share of the hours from May 1 to October 31 with a discharge or advisory status under DirtyWaterWatch rules.

Discharge or advisory reported
Season with incomplete source coverage

Seasons with incomplete source coverage: 2023. The share is of the hours a source covered. 1 discharge report has no end time and is not marked ongoing; under DirtyWaterWatch rules it shows caution, not a discharge or advisory status, and adds no hours here. 2 discharges reported to last more than 31 days are counted as 31 days. Official beach and cyanobacteria (harmful blue-green algae) advisories are counted on water pages only.

Sources: U.S. Environmental Protection Agency sewer overflow records; il-mwrd-lake-michigan-reversals. Records cover March 4, 1985 to November 6, 2026.

Show table

Share of the May to October season with a discharge or advisory status
Season	Share with a discharge or advisory status	Hours with a discharge or advisory status	Hours a source covered	Hours in the season	Incomplete source coverage
2000	0.0%	0	4,416	4,416
2001	1.6%	72	4,416	4,416
2002	0.5%	24	4,416	4,416
2003	0.0%	0	4,416	4,416
2004	0.0%	0	4,416	4,416
2005	0.0%	0	4,416	4,416
2006	0.0%	0	4,416	4,416
2007	1.1%	48	4,416	4,416
2008	2.2%	96	4,416	4,416
2009	0.5%	24	4,416	4,416
2010	0.5%	24	4,416	4,416
2011	1.1%	48	4,416	4,416
2012	0.0%	0	4,416	4,416
2013	0.0%	0	4,416	4,416
2014	1.1%	48	4,416	4,416
2015	1.1%	48	4,416	4,416
2016	0.5%	24	4,416	4,416
2017	1.1%	48	4,416	4,416
2018	0.0%	0	4,416	4,416
2019	0.5%	24	4,416	4,416
2020	1.6%	72	4,416	4,416
2021	0.0%	0	4,416	4,416
2022	0.0%	0	4,416	4,416
2023	1.6%	24	1,512	4,416	Yes

Reported discharges by calendar month, all years

Every counted discharge report, by the calendar month it began.

Months are summed over every year a tracked source covers; the table gives the number of years behind each month.

Sources: U.S. Environmental Protection Agency sewer overflow records; il-mwrd-lake-michigan-reversals. Records cover March 4, 1985 to November 6, 2026.

Show table

Reported discharges by calendar month, all years
Month	Reported discharges	Years of records
January	25	38
February	19	38
March	89	39
April	177	39
May	64	39
June	107	39
July	102	39
August	81	38
September	31	38
October	46	38
November	20	38
December	26	38

Reported discharges by wastewater outlet

Wastewater outlets with the most tracked discharge records: 10 of 20, all years. Counts depend on reporting coverage and do not measure legal compliance or harm.

The U.S. Environmental Protection Agency's sewer overflow records are limited: they hold only what operators file with the agency.

Sources: U.S. Environmental Protection Agency sewer overflow records; il-mwrd-lake-michigan-reversals. Records cover March 4, 1985 to November 6, 2026.

Show table

Reported discharges by wastewater outlet
Wastewater outlet	Sewer operator	Reported discharges
A01	WOOD RIVER STP, CITY OF	71
A01	CARLINVILLE STP	36
Wilmette Gate Wilmette gate (North Shore Channel)		35
005	PEKIN STP #1	31
006	PEKIN STP #1	30
004	PEKIN STP #1	28
003	PEKIN STP #1	26
038	BELLEVILLE STP #1, CITY OF	25
003	METROPOLIS STP, CITY OF	19
Chicago River Controlling Works		17
Other outlets (10)		35
Outlet not stated		434

How these charts are counted

We count each discharge once. Where a source publishes notices and confirmed reports, we use confirmed reports for an operator's month when available; otherwise we use notices. We combine revisions and exclude duplicate state reports copied by the U.S. Environmental Protection Agency (EPA). Monthly and yearly totals appear separately. Status hours follow this site's rules. Shaded gaps mean missing coverage, not zero discharges.

U.S. Environmental Protection Agency sewer overflow records: records from May 3, 2022 to the latest update (limited records)
il-mwrd-lake-michigan-reversals: records from March 4, 1985 to July 3, 2023

Reports in Illinois, newest first

The table appears as you scroll.

The newest reports in Illinois
When	Report	Status
not stated	Illinois Department of Public Health, Illinois BeachGuard System · Beach closure · volume not reported report · notice · map	listed
Oct 30, 1:00 AM CDTto 2:00 AM CDT	City of Wood River · Mississippi River · A01 · CSO · 742,000 gallons report · notice · map	ended
Oct 22, 2:30 AM CDTto 3:30 AM CDT	City of Mount Carmel · Wabash River · SSO · 20 gallons report · notice · map	ended
Oct 21, 11:00 PM CDTto Oct 22, 2:00 AM CDT	City of Mount Carmel · Wabash River · SSO · 1,800 gallons report · notice · map	ended
Oct 16, 11:45 PM CDTto Oct 17, 12:45 AM CDT	City of Wood River · Mississippi River · A01 · CSO · 4.44 million gallons report · notice · map	ended
Oct 16, 9:00 AM CDTto 11:15 AM CDT	City of Lawrenceville · Embarras River · SSO · 100 gallons report · notice · map	ended
Oct 15, 2:45 PM CDTto 5:45 PM CDT	City of Wood River · Mississippi River · A01 · CSO · 1.27 million gallons report · notice · map	ended
Oct 14, 9:45 AM CDTto 12:45 PM CDT	City of Wood River · Mississippi River · A01 · CSO · 713,600 gallons report · notice · map	ended
Oct 7, 7:30 PM CDTto Oct 8, 6:00 PM CDT	Sangamon County Water Reclamation District · Spring Creek · SSO · 25 gallons report · notice · map	ended
Oct 5, 1:00 PM CDTto Oct 6, 7:00 PM CDT	Village of Thebes · “mississippi river” · SSO · 150 gallons report · notice · map	ended
Oct 2, 9:54 AM CDT	Illinois Department of Public Health (Illinois BeachGuard System) · “Clinton lake SRA” · Beach advisory · volume not reported report · notice · map	to Nov 20, 2:41 AM CST
Oct 2, 3:00 AM CDTto 1:55 PM CDT	Kishwaukee Water Reclamation District · South Branch Kishwaukee River · SSO · 294,000 gallons report · notice · map	ended
Oct 2, 2:00 AM CDTto 8:00 AM CDT	Village of New Lenox · Hickory Creek · SSO · 3,600 gallons report · notice · map	ended
Oct 2, 1:00 AM CDTto 2:00 AM CDT	City of Wood River · Mississippi River · A01 · CSO · 439,000 gallons report · notice · map	ended
Oct 1, 5:55 PM CDTto Oct 2, 7:30 AM CDT	Kishwaukee Water Reclamation District · South Branch Kishwaukee River · SSO · 326,000 gallons report · notice · map	ended
Oct 1, 5:30 PM CDTto 9:00 PM CDT	City of Rock Island · Rock River · SSO · 5,000 gallons report · notice · map	ended
Oct 1, 4:30 PM CDTto Oct 2, 9:00 AM CDT	City of Moline · Mississippi River · SSO · 18,486 gallons in all map	ended
Oct 1, 4:30 PM CDTto Oct 2, 9:00 AM CDT	City of Moline · Mississippi River · SSO · 3,712 gallons report · notice · map	ended
Oct 1, 4:30 PM CDTto Oct 2, 9:00 AM CDT	City of Moline · Mississippi River · SSO · 3,712 gallons report · notice · map	ended
Oct 1, 4:30 PM CDTto Oct 2, 9:00 AM CDT	City of Moline · Mississippi River · SSO · 3,712 gallons report · notice · map	ended
Oct 1, 4:30 PM CDTto Oct 2, 5:00 PM CDT	City of Moline · Rock River · SSO · 2,450 gallons report · notice · map	ended
Oct 1, 4:30 PM CDTto Oct 2, 5:00 PM CDT	City of Moline · Rock River · SSO · 2,450 gallons report · notice · map	ended
Oct 1, 4:30 PM CDTto Oct 2, 5:00 PM CDT	City of Moline · Rock River · SSO · 2,450 gallons report · notice · map	ended
Sep 29, 3:20 PM CDTto 3:30 PM CDT	Illinois American Water Company · “Illinois River” · SSO · 7,200 gallons report · notice · map	ended
Sep 24, 2:56 PM CDTto 6:00 PM CDT	Village of New Lenox · Hickory Creek · SSO · 2,000 gallons report · notice · map	ended
Sep 22, 12:00 PM CDTto 9:00 PM CDT	Illinois American Water Company · Mississippi River · Bypass · 3 million gallons report · notice · map	ended
Sep 21, 5:30 AM CDTto 7:00 AM CDT	City of Belleville · Powdermill Creek · CSO · 75,000 gallons report · notice · map	ended
Sep 21, 3:45 AM CDTto 8:45 AM CDT	City of Wood River · Mississippi River · A01 · CSO · 3.15 million gallons report · notice · map	ended
Sep 20, 2:00 PM CDTto 8:00 PM CDT	City of Rock Island · Rock River · SSO · 1,000 gallons report · notice · map	ended
Sep 20, 1:00 PM CDTto Sep 21, 7:00 PM CDT	City of Rochelle · Kyte River · SSO · 36,000 gallons report · notice · map	ended
Sep 20, 1:00 PM CDTto 11:00 PM CDT	City of Moline · Rock River · SSO · 60,000 gallons report · notice · map	ended
Sep 20, 11:30 AM CDTto 3:00 PM CDT	Kishwaukee Water Reclamation District · South Branch Kishwaukee River · SSO · 84,000 gallons report · notice · map	ended
Sep 20, 10:55 AM CDTto 5:25 PM CDT	Kishwaukee Water Reclamation District · South Branch Kishwaukee River · SSO · 234,000 gallons report · notice · map	ended
Sep 20, 9:06 AM CDTto 6:08 PM CDT	City of Moline · Mississippi River · SSO · 135,500 gallons report · notice · map	ended
Sep 20, 7:00 AM CDTto 9:00 AM CDT	City of Carlinville · Briar Creek · Bypass · 0 gallons report · notice · map	ended
Sep 19to Sep 20	Village of Franklin Grove · Franklin Creek · Bypass · volume not reported report · notice · map	ended
Sep 18, 2:00 PM CDTto 5:00 PM CDT	Village of Thebes · Miller Creek · SSO · 150 gallons report · notice · map	ended
Sep 17to Sep 17	Kishwaukee Water Reclamation District · South Branch Kishwaukee River · SSO · volume not reported report · notice · map	ended
Sep 16, 7:30 AM CDTto 8:30 AM CDT	City of Pekin · Illinois River · 006 · CSO · 3 million gallons in all map	ended
Sep 16, 7:30 AM CDTto 8:30 AM CDT	City of Pekin · Illinois River · 006 · CSO · 1 million gallons report · notice · map	ended
Sep 16, 7:30 AM CDTto 8:30 AM CDT	City of Pekin · Illinois River · 005 · CSO · 1 million gallons report · notice · map	ended
Sep 16, 7:30 AM CDTto 8:30 AM CDT	City of Pekin · Illinois River · 004 · CSO · 1 million gallons report · notice · map	ended
Sep 16, 6:00 AM CDTto 8:00 AM CDT	City of Macomb · “Kiljorden Creek” · SSO · 2,500 gallons report · notice · map	ended
Sep 16, 12:30 AM CDTto 1:30 AM CDT	City of Belleville · Powdermill Creek · CSO · 50,000 gallons report · notice · map	ended
Sep 10, 12:00 PM CDTto 10:00 PM CDT	Illinois American Water Company · Mississippi River · Bypass · 1 gallon report · notice · map	ended
Sep 10, 7:00 AM CDTto Sep 11, 7:30 PM CDT	City of Belleville · Richland Creek · 038 · CSO · 72.34 million gallons report · notice · map	ended
Sep 10, 5:30 AM CDTto 8:30 AM CDT	City of Belleville · Powdermill Creek · CSO · 150,000 gallons report · notice · map	ended
Sep 8, 4:00 PM CDTto 9:30 PM CDT	City of Troy · “Retention pond” · SSO · 25,000 gallons report · notice · map	ended
Sep 4, 9:10 AM CDT	Illinois Department of Public Health (Illinois BeachGuard System) · Evergreen Lake · Beach advisory · volume not reported report · notice · map	to Nov 20, 2:41 AM CST
Sep 4, 8:00 AM CDTto Nov 5, 9:13 AM CST	Lake County Health Department (Illinois BeachGuard System) · “Lake Miltmore” · Beach advisory · volume not reported report · notice · map	lifted
Sep 2, 7:30 AM CDT	Lake County Health Department (Illinois BeachGuard System) · Dunns Lake · Beach closure · volume not reported report · notice · map	to Nov 20, 2:41 AM CST
Sep 1, 8:00 AM CDT	Lake County Health Department (Illinois BeachGuard System) · Deep Lake · Beach closure · volume in each report map	to Nov 20, 2:41 AM CST
Sep 1, 8:00 AM CDT	Lake County Health Department (Illinois BeachGuard System) · Deep Lake · Beach closure · volume not reported report · notice · map	to Nov 20, 2:41 AM CST
Sep 1, 8:00 AM CDT	Lake County Health Department (Illinois BeachGuard System) · Wooster Lake · Beach closure · volume not reported report · notice · map	to Nov 20, 2:41 AM CST
Sep 1, 8:00 AM CDT	Lake County Health Department (Illinois BeachGuard System) · “Lake Miltmore” · Beach closure · volume not reported report · notice · map	to Nov 20, 2:41 AM CST
Aug 28, 5:01 AM CDTto Aug 30, 2:30 AM CDT	Village of Algonquin · Fox River · SSO · 600,000 gallons report · notice · map	ended
Aug 23, 4:30 PM CDTto 4:45 PM CDT	Urbana & Champaign Sanitary District · “Salt Fork of the Saline Branch” · Bypass · 15,000 gallons report · notice · map	ended
Aug 23, 1:03 AM CDTto 4:59 AM CDT	Greater Peoria Sanitary And Sewage District · Illinois River · SSO · 100 gallons report · notice · map	ended
Aug 20, 11:00 AM CDTto 6:30 PM CDT	City of Georgetown · “ellis creek” · 003 · CSO · 2 gallons report · notice · map	ended
Aug 20to Aug 20	Urbana & Champaign Sanitary District · “Storm sewer disch. to Saline Branch of Salt Fork” · SSO · volume not reported report · notice · map	ended
Aug 20to Aug 20	Village of Tilton · “Big Vermilion” · Bypass · volume not reported report · notice · map	ended
Aug 19to Aug 20	Village of Colfax · Mackinaw River · SSO · volume not reported report · notice · map	ended
Aug 17, 4:00 AM CDTto 8:00 AM CDT	City of Belleville · Powdermill Creek · CSO · 200,000 gallons report · notice · map	ended
Aug 17, 1:45 AM CDTto 6:45 AM CDT	City of Wood River · Mississippi River · A01 · CSO · 3.41 million gallons report · notice · map	ended
Aug 16, 6:00 PM CDTto Aug 17, 6:00 PM CDT	Village of Alexis · Middle Henderson Creek · SSO · 10,000 gallons report · notice · map	ended
Aug 16, 9:30 AM CDTto 10:30 AM CDT	Beardstown Sanitary District · Illinois River · A01 · CSO · 972,000 gallons report · notice · map	ended
Aug 15, 12:30 PM CDTto 6:30 PM CDT	Danville Sanitary District · Stoney Creek · SSO · 515 gallons in all map	ended
Aug 15, 12:30 PM CDTto 6:30 PM CDT	Danville Sanitary District · Stoney Creek · SSO · 285 gallons report · notice · map	ended
Aug 15, 12:30 PM CDTto 6:30 PM CDT	Danville Sanitary District · Stoney Creek · SSO · 230 gallons report · notice · map	ended
Aug 15, 12:00 PM CDTto Aug 16, 12:00 PM CDT	City of Bushnell · Drowning Fork · SSO · 100,000 gallons report · notice · map	ended
Aug 15, 11:30 AM CDTto Aug 18, 5:00 PM CDT	Illinois American Water Company · Owl Creek · SSO · 837,000 gallons report · notice · map	ended
Aug 15, 11:00 AM CDTto 3:00 PM CDT	City of Macomb · “kiljordin creek” · SSO · 110,000 gallons in all map	ended
Aug 15, 11:00 AM CDTto 3:00 PM CDT	City of Macomb · “kiljordin creek” · SSO · 10,000 gallons report · notice · map	ended
Aug 15, 11:00 AM CDTto 11:00 PM CDT	City of Macomb · “kiljordin creek” · SSO · 100,000 gallons report · notice · map	ended
Aug 15, 9:16 AM CDTto 12:30 PM CDT	Beardstown Sanitary District · Illinois River · A01 · CSO · 4.29 million gallons report · notice · map	ended
Aug 15, 6:00 AM CDTto 11:00 AM CDT	City of Pekin · Illinois River · 006 · CSO · 16 million gallons in all map	ended
Aug 15, 6:00 AM CDTto 11:00 AM CDT	City of Pekin · Illinois River · 006 · CSO · 4 million gallons report · notice · map	ended
Aug 15, 6:00 AM CDTto 11:00 AM CDT	City of Pekin · Illinois River · 005 · CSO · 4 million gallons report · notice · map	ended
Aug 15, 6:00 AM CDTto 11:00 AM CDT	City of Pekin · Illinois River · 004 · CSO · 4 million gallons report · notice · map	ended
Aug 15, 6:00 AM CDTto 11:00 AM CDT	City of Pekin · Illinois River · 003 · CSO · 4 million gallons report · notice · map	ended
Aug 15, 5:00 AM CDTto Aug 17, 3:00 AM CDT	Village of Minier · “Ditch feeding West Fork Suger Creek” · SSO · 2.1 million gallons report · notice · map	ended
Aug 15to Aug 17	City of Laharpe · South Branch La Moine River · Bypass · volume not reported report · notice · map	ended
Aug 15to Aug 18	Village of Colfax · Mackinaw River · SSO · volume not reported report · notice · map	ended
Aug 15to Aug 15	City of Galva · “Unnamed tributary to Edwards River” · SSO · volume not reported report · notice · map	ended
Aug 15to Aug 15	City of Galva · Mud Run · SSO · volume not reported report · notice · map	ended
Aug 14, 9:00 AM CDTto 7:30 PM CDT	City of Georgetown · “ellis creek” · 003 · CSO · 3 gallons report · notice · map	ended
Aug 14, 6:00 AM CDTto 6:00 PM CDT	Village of Dwight · “Brewster Run (Unnamed creek along Route 66)” · SSO · 3,300 gallons report · notice · map	ended
Aug 14, 5:30 AM CDTto 9:30 AM CDT	City of Pekin · Illinois River · 006 · CSO · 12 million gallons in all map	ended
Aug 14, 5:30 AM CDTto 9:30 AM CDT	City of Pekin · Illinois River · 006 · CSO · 3 million gallons report · notice · map	ended
Aug 14, 5:30 AM CDTto 9:30 AM CDT	City of Pekin · Illinois River · 005 · CSO · 3 million gallons report · notice · map	ended
Aug 14, 5:30 AM CDTto 9:30 AM CDT	City of Pekin · Illinois River · 004 · CSO · 3 million gallons report · notice · map	ended
Aug 14, 5:30 AM CDTto 9:30 AM CDT	City of Pekin · Illinois River · 003 · CSO · 3 million gallons report · notice · map	ended
Aug 14, 2:30 AM CDTto Aug 28, 4:00 PM CDT	City of Georgetown · “ellis creek” · 002 · CSO · 45 gallons report · notice · map	ended
Aug 14to Aug 15	Village of Tremont · “Tiber Creek” · SSO · volume not reported report · notice · map	ended
Aug 14to Aug 15	Urbana & Champaign Sanitary District · “Saline Branch” · SSO · volume not reported report · notice · map	ended
Aug 14to Aug 16	Village of Tilton · Grape Creek · SSO · volume not reported report · notice · map	ended
Aug 14to Aug 15	City of Colchester · “Unnamed tributary of the East Fork LaMoine River” · SSO · volume not reported report · notice · map	ended
Aug 14to Aug 14	Aqua Illinois, Inc. · Deer Creek · SSO · volume not reported report · notice · map	ended
Aug 13, 12:00 PM CDTto Aug 16, 5:00 AM CDT	City of Cuba · “put creek” · SSO · 1.5 million gallons in all map	ended
Aug 13, 12:00 PM CDTto Aug 16, 5:00 AM CDT	City of Cuba · “put creek” · SSO · 500,000 gallons report · notice · map	ended
Aug 13, 12:00 PM CDTto Aug 16, 5:00 AM CDT	City of Cuba · “put creek” · SSO · 500,000 gallons report · notice · map	ended
Aug 13, 12:00 PM CDTto Aug 16, 5:00 AM CDT	City of Cuba · “put creek” · SSO · 500,000 gallons report · notice · map	ended
Aug 13to Aug 13	City of Canton · Big Creek · Bypass · volume not reported report · notice · map	ended
Aug 11, 10:45 PM CDTto Aug 12, 6:30 PM CDT	City of Morris · Nettle Creek · Bypass · 2 gallons report · notice · map	ended
Aug 11, 4:00 PM CDTto 8:00 PM CDT	Pheasant Lake Estates MHP · “Tributary to ThornCreek” · SSO · 180 gallons report · notice · map	ended
Aug 11, 11:00 AM CDT	Illinois Department of Public Health (Illinois BeachGuard System) · Beach closure · volume not reported report · notice · map	to Nov 20, 2:41 AM CST
Aug 11to Aug 12	City of Crest Hill · Des Plaines River · SSO · volume not reported report · notice · map	ended
Aug 6, 8:30 PM CDTto Aug 8, 7:15 PM CDT	City of Belleville · Richland Creek · 038 · CSO · 59.26 million gallons report · notice · map	ended

Showing the newest 100 of 836 reports; all reports: by year · CSV

All reports in Illinois by year

2026 (405 records) · 2025 (351 records) · 2024 (22 records) · 2023 (2 records) · 2020 (3 records) · 2019 (1 record) · 2017 (3 records) · 2016 (1 record) · 2015 (2 records) · 2014 (3 records) · 2013 (3 records) · 2011 (3 records) · 2010 (2 records) · 2009 (3 records) · 2008 (4 records) · 2007 (1 record) · 2002 (2 records) · 2001 (4 records) · 1999 (1 record) · 1997 (5 records) · 1996 (2 records) · 1990 (6 records) · 1989 (1 record) · 1987 (3 records) · 1986 (1 record) · 1985 (2 records)

By town

Towns along the waters we track and the towns sewer operators serve, A to Z.

1,622 towns; the list appears as you scroll.

Other states we track: California, Connecticut, District of Columbia, Florida, Georgia, Maine, Maryland, Massachusetts, Michigan, New Hampshire, New Jersey, New York, North Carolina, Pennsylvania, Rhode Island, Vermont, Virginia, Washington.

Reported sewage discharges in Illinois

Data and its limits

What stands in the way

Public-notice channels

Required by law: 130

Required by a permit: 124

Voluntary: 11

Discharge or advisory reported 5 waters

Caution 68 waters

No current status shown 356 waters

Sewer operators

What this page covers

Post-discharge periods and their sources

Sources checked automatically

The last 90 days in Illinois

Sewage discharges: 41 periods

Beach advisories: 1 period

Reported discharges in Illinois over time

Reported discharges per month

Hours with a discharge or advisory status per month

Days with a reported discharge per month

Reported discharges per year, 2000 to 2026

Reported volume per year

Hours with a discharge or advisory status per year

Share of the May to October season with a discharge or advisory status

Reported discharges by calendar month, all years

Reported discharges by wastewater outlet

Reports in Illinois, newest first

All reports in Illinois by year

By town