NILES WWTP
Sewer utility with combined sewers · Michigan · Niles
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.
Solid dots mark combined sewer outfalls. Ringed dots mark treatment plant outfalls. Dashed river stretches are estimates of where a discharge travels. Square boat markers mark boat launches listed by OpenBoatLaunch.
- Federal wastewater discharge permit (NPDES)
- MI0023701
- Wastewater outlets
- 1 combined sewer outfall and 2 treatment plant outfalls listed by EPA or state agencies · List
- Waters listed as receiving wastewater
- St. Joseph River
- Tracked waters
- Saint Joseph River, MI, St. Joseph River, MI
- Discharge records counted
- 33 records · latest
- Total reported volume in these records
- 480,827,450 gallons across the 33 records that give a volume
These totals reflect the records we track. Missing volumes and gaps in reporting limit comparisons between operators.
Sources: EPA ECHO and the operator and state sources linked below. Counts use the discharge records on this page. Updated 2026-11-05 01:25 UTC.
Public notices and alerts
Pages where NILES WWTP or the state publishes its notices (check them for an alert sign-up):
Its public-notice channels
- Health department page · Required by law
Testing results not read
MCL 324.3112a(3): "Each time a discharge to surface waters occurs under subsection (1), the person responsible for the sewer system shall test the affected waters for E. coli to assess the risk to the public health", with the results to the county health departments and the department (up to 10 tests; the health department may waive it)
- Health department page · Required by law
Health department notice not read
MCL 324.3112a(1): "the person responsible for the sewer system shall immediately, but not more than 24 hours after the discharge begins, notify the department; local health departments...; a daily newspaper of general circulation in the county or counties in which a municipality notified pursuant to subsection (4) is located; and a daily newspaper of general circulation in the county in which the discharge occurred or is occurring"
- News page · Required by law
Printed notice not read
MCL 324.3112a(1): "the person responsible for the sewer system shall immediately, but not more than 24 hours after the discharge begins, notify the department; local health departments...; a daily newspaper of general circulation in the county or counties in which a municipality notified pursuant to subsection (4) is located; and a daily newspaper of general circulation in the county in which the discharge occurred or is occurring"
- Operator's notice page · Required by a permit (MI0023701)
CSO public notification not read
40 CFR 122.38: a CSO permittee in the Great Lakes Basin gives the public an initial notice of a discharge as soon as possible and no later than 4 hours after becoming aware of it, a supplemental notice within 7 days after it ends and an annual notice, under the public notification plan its permit requires; NPDES permit MI0023701: public notification plan (permit text not read)
Source: NILES WWTP's public notice and alert pages and the state's notification records; DirtyWaterWatch register of public-notice channels and its page monitor.
Report a missing notice or error
Rain and discharges
The NOAA MRMS radar-only rainfall estimate for the 24 hours to the latest hour, read every hour at each outfall from the radar grid. We show a caution when the rain reaches the amount below and no discharge report has arrived.
- Threshold
- 0.1 in of rain in 24 hours (site default: This site's default: 0.1 inch of rain in 24 hours at a combined sewer outfall, applied where the state publishes no rain trigger of its own)
- Radar now
- 2.6 in in the 24 hours to Nov 4, 2026, 7:00 PM EST
- Forecast
- 0.01 in forecast in the next 24 hours (NWS forecast issued Nov 4, 2026, 6:29 PM EST)
- Status
- Discharge possible: heavy rain, no report received
Source: NOAA National Weather Service, MRMS radar-only rainfall estimate, valid Nov 4, 2026, 7:00 PM EST, retrieved 2026-11-05 01:19 UTC; threshold: site default; rule: How it works, discharge likely or possible.
Wastewater outlets
Outfall: a pipe or outlet where wastewater enters a water body.
1 combined sewer outfall and 2 treatment plant outfalls listed by EPA or state agencies.
Combined sewer outfalls
1 outfall
- Outfall 007 · receiving water in the permit: St. Joseph River · Saint Joseph River, MI · open
Source: U.S. Environmental Protection Agency (EPA) national combined sewer outfall inventory (ECHO) and state outfall layers. Open or closed as EPA's inventory lists it. DirtyWaterWatch links outlets to waters using permit numbers, locations and names.
Treatment plant outfalls
2 outfalls
- Outfall 001 · receiving water in the permit: ST. JOSEPH RIVER · St. Joseph River, MI · status not published
- Outfall 002 · receiving water in the permit: ST. JOSEPH RIVER · St. Joseph River, MI · status not published
Source: U.S. Environmental Protection Agency (EPA) permit records (ICIS-NPDES permitted features): where a treatment plant’s permitted discharge leaves. No national source says whether a plant outfall is open or closed.
Reports and advisories
Sanitary sewer overflow (SSO): sewage spills from a sewer meant to carry sewage separately from rainwater. Combined sewer overflow (CSO): sewage mixed with rainwater spills from a shared sewer system. Treatment bypass: wastewater skips one or more treatment steps.
| When | Report | Status |
|---|---|---|
| to 11:30 AM | Water not mapped · JD's Truck Stop - Business yard · SSO · 60,000 gallons report · notice | ended |
| to 10:30 AM | “St. Joseph River” · Grant St. Siphon - East parking area of Corewell Health Hospital · SSO · 50,000 gallons report · notice | ended |
| to 4:10 AM | St. Joseph River · 002 Plant retention basin 002 outfall · CSO · 8.1 million gallons in all map | ended |
| to 4:10 AM | St. Joseph River · 002 Plant retention basin 002 outfall · CSO · 8 million gallons report · notice · map | ended |
| to 4:10 AM | “St. Joseph River” · Grant St. Siphon - Siphon Chamber under the St. Joe River · SSO · 100,000 gallons report · notice | ended |
| to 7:00 AM | Water not mapped · Progressive Drive lift station - lift station located on roadside [house number removed] Progressive Dr. Niles, MI 49120 · SSO · 94,500 gallons report · notice | ended |
| to 11:00 AM | “St. Joseph River” · Grant St siphon overflow, west side - Tidal Valve on Grant St Siphon Structure · SSO · 20,000 gallons report · notice | ended |
| to 10:10 AM | “St. Joseph River” · Grant St siphon overflow, west side - Tidal Valve on Grant St Siphon Structure · SSO · 15,000 gallons report · notice | ended |
| to 5:00 PM | “None” · Private Residence Address - Force Main Break · SSO · 15,000 gallons report · notice | ended |
| to 10:45 PM | Saint Joseph River · 007 · CSO · 212,000 gallons report · notice · map | ended |
| to Mar 11 ’18, 12:30 PM | “St. Joseph River” · Niles WWTP - RTB/Storage Tank · Bypass · 189.1 million gallons report · notice | ended |
| to 4:30 PM | “None” · FM on Chicago Rd by the SMCAS Building - Force Main Rupture on Chicago Rd near SMCAS Building · SSO · 5,000 gallons report · notice | ended |
| to Aug 16 ’16, 6:15 AM | St. Joseph River · 002 Retention Basin - WWTP · CSO · 12.05 million gallons report · notice · map | ended |
| to 12:00 PM | “St. Joseph River” · Main St. Bridge West End - Abandoned Interceptor Sewer · SSO · 500 gallons report · notice | ended |
| to 1:45 PM | “St. Joseph River” · East end of Main St (M-139) bridge, approx. 200' N of the bridge. - East end of Main St Bridge · SSO · 750 gallons report · notice | ended |
| to 5:30 AM | St. Joseph River · 002 Retention Basin - WWTP · CSO · 570,000 gallons report · notice · map | ended |
| to Mar 17 ’09, 11:59 PM | St. Joseph River · 002 Retention Basin - WWTP · CSO · 83.4 million gallons report · notice · map | ended |
| to Sep 18 ’08, 4:50 PM | St. Joseph River · 002 Retention Basin - WWTP · CSO · 33.65 million gallons report · notice · map | ended |
| to Feb 20 ’08, 7:35 AM | St. Joseph River · 002 Retention Basin - WWTP · CSO · 14.3 million gallons report · notice · map | ended |
| to Feb 10 ’08, 6:40 PM | St. Joseph River · 002 Retention Basin - WWTP · CSO · 28.7 million gallons report · notice · map | ended |
| to Jan 15 ’08, 11:59 AM | St. Joseph River · 002 Retention Basin - WWTP · CSO · 89.5 million gallons report · notice · map | ended |
| to Nov 19 ’07, 1:30 PM | “open ditch running perpendicular to road” · Private Residence Address - Break in sewer leaking into culvert in the the road · SSO · 1,400 gallons report · notice | ended |
| to 7:50 AM | St. Joseph River · 002 Retention Basin - WWTP · CSO · 1.18 million gallons report · notice · map | ended |
| to 9:00 PM | St. Joseph River · 002 Retention Basin - WWTP · CSO · 900,000 gallons report · notice · map | ended |
| to 9:30 PM | St. Joseph River · 002 Retention Basin - WWTP · CSO · 1.3 million gallons report · notice · map | ended |
| to 8:10 AM | St. Joseph River · 002 Retention Basin - WWTP · CSO · 2.8 million gallons report · notice · map | ended |
Sources: EGLE MiEnviro CSO/SSO List, retrieved 2026-11-04 15:09 UTC. A report's record id and times show when you hover or focus its "report" link.
Showing the latest 25 records of 33 records.See them all with filters.
All reports in Michigan by year: 2024 (2 from NILES WWTP) · 2023 (2 from NILES WWTP) · 2021 (1 from NILES WWTP) · 2018 (5 from NILES WWTP) · 2017 (1 from NILES WWTP) · 2016 (1 from NILES WWTP) · 2012 (1 from NILES WWTP) · 2011 (1 from NILES WWTP) · 2010 (1 from NILES WWTP) · 2009 (1 from NILES WWTP) · 2008 (4 from NILES WWTP) · 2007 (2 from NILES WWTP) · 2006 (1 from NILES WWTP) · 2005 (1 from NILES WWTP) · 2004 (2 from NILES WWTP) · 2003 (3 from NILES WWTP) · 2002 (3 from NILES WWTP) · 2001 (1 from NILES WWTP)
Other sewer operators on these waters
- Saint Joseph River, MI: Benton Harbor-St. Joseph Joint Board of Commissioners, Buchanan WWTP, Cass County Board of Public Works, City of Jonesville, City of Litchfield, City of St. Joseph (ST JOSEPH CSO), City of Three Rivers, Hillsdale Board of Public Utilities, Village of Berrien Springs, Village of Colon, Village of Constantine, Village of Tekonsha, Village of Union City
- St. Joseph River, MI: City of Litchfield, City of Three Rivers, Hillsdale Board of Public Utilities, Village of Berrien Springs, Village of Colon, Village of Tekonsha
The last 90 days
No discharge, advisory or caution periods are shown for the waters this sewer operator's reports were placed on in this time span. Check downstream stretches and source coverage.
Source: DirtyWaterWatch calculations using the reports named above and the published status rules. Updated 2026-11-05 01:25 UTC.
Reported discharges over time
- Discharges reported by NILES WWTP, last 12 months0December 2025 to November 2026Verified reports where available, else notices; revisions and duplicates counted once.
- Days with a discharge reported by NILES WWTP, last 12 months0December 2025 to November 2026A day counts once however many discharges were under way on it.
- Hours with a discharge or advisory status from NILES WWTP's reports, last 12 months0December 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.
- 2026 season with a discharge or advisory status (NILES WWTP)0.0%May to October 2026Share of May 1 to October 31 hours with red status by the map's rules, of the hours a source covered.
Blended discharge: wastewater that skipped some treatment is mixed with treated wastewater.
Reported discharges per month
4 reported discharges, January 2022 to November 2026.
- Combined sewer overflow
- Sanitary sewer overflow
- Treatment bypass, blended or other
Source: mi-egle-mienviro-cso-sso-list. Records cover January 1, 2022 to November 4, 2026.
Show table
| 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 | 1 | 1 | 0 | 2 | Source records | |
| August 2023 | 0 | 0 | 0 | 0 | ||
| September 2023 | 0 | 0 | 0 | 0 | ||
| October 2023 | 0 | 0 | 0 | 0 | ||
| November 2023 | 0 | 0 | 0 | 0 | ||
| December 2023 | 0 | 0 | 0 | 0 | ||
| January 2024 | 0 | 0 | 0 | 0 | ||
| February 2024 | 0 | 0 | 0 | 0 | ||
| March 2024 | 0 | 0 | 0 | 0 | ||
| April 2024 | 0 | 0 | 0 | 0 | ||
| May 2024 | 0 | 0 | 0 | 0 | ||
| June 2024 | 0 | 2 | 0 | 2 | Source records | |
| July 2024 | 0 | 0 | 0 | 0 | ||
| August 2024 | 0 | 0 | 0 | 0 | ||
| September 2024 | 0 | 0 | 0 | 0 | ||
| October 2024 | 0 | 0 | 0 | 0 | ||
| November 2024 | 0 | 0 | 0 | 0 | ||
| December 2024 | 0 | 0 | 0 | 0 | ||
| January 2025 | 0 | 0 | 0 | 0 | ||
| February 2025 | 0 | 0 | 0 | 0 | ||
| March 2025 | 0 | 0 | 0 | 0 | ||
| April 2025 | 0 | 0 | 0 | 0 | ||
| May 2025 | 0 | 0 | 0 | 0 | ||
| June 2025 | 0 | 0 | 0 | 0 | ||
| July 2025 | 0 | 0 | 0 | 0 | ||
| August 2025 | 0 | 0 | 0 | 0 | ||
| September 2025 | 0 | 0 | 0 | 0 | ||
| October 2025 | 0 | 0 | 0 | 0 | ||
| November 2025 | 0 | 0 | 0 | 0 | ||
| December 2025 | 0 | 0 | 0 | 0 | ||
| January 2026 | 0 | 0 | 0 | 0 | ||
| February 2026 | 0 | 0 | 0 | 0 | ||
| March 2026 | 0 | 0 | 0 | 0 | ||
| April 2026 | 0 | 0 | 0 | 0 | ||
| May 2026 | 0 | 0 | 0 | 0 | ||
| June 2026 | 0 | 0 | 0 | 0 | ||
| July 2026 | 0 | 0 | 0 | 0 | ||
| August 2026 | 0 | 0 | 0 | 0 | ||
| September 2026 | 0 | 0 | 0 | 0 | ||
| October 2026 | 0 | 0 | 0 | 0 | ||
| November 2026 | 0 | 0 | 0 | 0 |
Hours with a discharge or advisory status per month
Hours when a water had a discharge or advisory status from this sewer operator's reports, under DirtyWaterWatch rules.
- Discharge or advisory reported
Official beach and cyanobacteria (harmful blue-green algae) advisories are counted on water pages only.
Source: mi-egle-mienviro-cso-sso-list. Records cover January 1, 2001 to November 4, 2026.
Show table
| 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 | 2 | 2 | 744 | |
| August 2023 | 0 | 0 | 744 | |
| September 2023 | 0 | 0 | 720 | |
| October 2023 | 0 | 0 | 744 | |
| November 2023 | 0 | 0 | 720 | |
| December 2023 | 0 | 0 | 744 | |
| January 2024 | 0 | 0 | 744 | |
| February 2024 | 0 | 0 | 696 | |
| March 2024 | 0 | 0 | 744 | |
| April 2024 | 0 | 0 | 720 | |
| May 2024 | 0 | 0 | 744 | |
| June 2024 | 2 | 2 | 720 | |
| July 2024 | 0 | 0 | 744 | |
| August 2024 | 0 | 0 | 744 | |
| September 2024 | 0 | 0 | 720 | |
| October 2024 | 0 | 0 | 744 | |
| November 2024 | 0 | 0 | 720 | |
| December 2024 | 0 | 0 | 744 | |
| January 2025 | 0 | 0 | 744 | |
| February 2025 | 0 | 0 | 672 | |
| March 2025 | 0 | 0 | 744 | |
| April 2025 | 0 | 0 | 720 | |
| May 2025 | 0 | 0 | 744 | |
| June 2025 | 0 | 0 | 720 | |
| July 2025 | 0 | 0 | 744 | |
| August 2025 | 0 | 0 | 744 | |
| September 2025 | 0 | 0 | 720 | |
| October 2025 | 0 | 0 | 744 | |
| November 2025 | 0 | 0 | 720 | |
| December 2025 | 0 | 0 | 744 | |
| January 2026 | 0 | 0 | 744 | |
| February 2026 | 0 | 0 | 672 | |
| March 2026 | 0 | 0 | 744 | |
| April 2026 | 0 | 0 | 720 | |
| May 2026 | 0 | 0 | 744 | |
| June 2026 | 0 | 0 | 720 | |
| July 2026 | 0 | 0 | 744 | |
| August 2026 | 0 | 0 | 744 | |
| September 2026 | 0 | 0 | 720 | |
| October 2026 | 0 | 0 | 744 | |
| November 2026 | 0 | 0 | 94 |
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.
Source: mi-egle-mienviro-cso-sso-list. Records cover January 1, 2022 to November 4, 2026.
Show table
| 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 | |
| August 2023 | 0 | |
| September 2023 | 0 | |
| October 2023 | 0 | |
| November 2023 | 0 | |
| December 2023 | 0 | |
| January 2024 | 0 | |
| February 2024 | 0 | |
| March 2024 | 0 | |
| April 2024 | 0 | |
| May 2024 | 0 | |
| June 2024 | 1 | |
| July 2024 | 0 | |
| August 2024 | 0 | |
| September 2024 | 0 | |
| October 2024 | 0 | |
| November 2024 | 0 | |
| December 2024 | 0 | |
| January 2025 | 0 | |
| February 2025 | 0 | |
| March 2025 | 0 | |
| April 2025 | 0 | |
| May 2025 | 0 | |
| June 2025 | 0 | |
| July 2025 | 0 | |
| August 2025 | 0 | |
| September 2025 | 0 | |
| October 2025 | 0 | |
| November 2025 | 0 | |
| December 2025 | 0 | |
| January 2026 | 0 | |
| February 2026 | 0 | |
| March 2026 | 0 | |
| April 2026 | 0 | |
| May 2026 | 0 | |
| June 2026 | 0 | |
| July 2026 | 0 | |
| August 2026 | 0 | |
| September 2026 | 0 | |
| October 2026 | 0 | |
| November 2026 | 0 |
Reported discharges per year, 2001 to 2026
33 reported discharges, 2001 to 2026.
- Combined sewer overflow
- Sanitary sewer overflow
- Treatment bypass, blended or other
Source: mi-egle-mienviro-cso-sso-list. Records cover January 1, 2001 to November 4, 2026.
Show table
| Year | Combined sewer overflow | Sanitary sewer overflow | Treatment bypass, blended or other | Total | Coverage |
|---|---|---|---|---|---|
| 2001 | 0 | 1 | 0 | 1 | |
| 2002 | 3 | 0 | 0 | 3 | |
| 2003 | 3 | 0 | 0 | 3 | |
| 2004 | 2 | 0 | 0 | 2 | |
| 2005 | 1 | 0 | 0 | 1 | |
| 2006 | 1 | 0 | 0 | 1 | |
| 2007 | 1 | 1 | 0 | 2 | |
| 2008 | 4 | 0 | 0 | 4 | |
| 2009 | 1 | 0 | 0 | 1 | |
| 2010 | 1 | 0 | 0 | 1 | |
| 2011 | 0 | 1 | 0 | 1 | |
| 2012 | 0 | 1 | 0 | 1 | |
| 2013 | 0 | 0 | 0 | 0 | |
| 2014 | 0 | 0 | 0 | 0 | |
| 2015 | 0 | 0 | 0 | 0 | |
| 2016 | 1 | 0 | 0 | 1 | |
| 2017 | 0 | 1 | 0 | 1 | |
| 2018 | 1 | 3 | 1 | 5 | |
| 2019 | 0 | 0 | 0 | 0 | |
| 2020 | 0 | 0 | 0 | 0 | |
| 2021 | 0 | 1 | 0 | 1 | |
| 2022 | 0 | 0 | 0 | 0 | |
| 2023 | 1 | 1 | 0 | 2 | |
| 2024 | 0 | 2 | 0 | 2 | |
| 2025 | 0 | 0 | 0 | 0 | |
| 2026 | 0 | 0 | 0 | 0 |
Reported volume per year
Gallons (axis: K thousand, M million), summed from the 33 reports that gave a volume as a number.
Source: mi-egle-mienviro-cso-sso-list. Records cover January 1, 2001 to November 4, 2026.
Show table
| Year | Reported volume, gallons | Reports with a volume | Reports without a volume | Coverage |
|---|---|---|---|---|
| 2001 | 900,000 | 1 | 0 | |
| 2002 | 8,330,000 | 3 | 0 | |
| 2003 | 4,395,300 | 3 | 0 | |
| 2004 | 3,980,000 | 2 | 0 | |
| 2005 | 1,300,000 | 1 | 0 | |
| 2006 | 900,000 | 1 | 0 | |
| 2007 | 1,181,400 | 2 | 0 | |
| 2008 | 166,150,000 | 4 | 0 | |
| 2009 | 83,400,000 | 1 | 0 | |
| 2010 | 570,000 | 1 | 0 | |
| 2011 | 750 | 1 | 0 | |
| 2012 | 500 | 1 | 0 | |
| 2013 | 0 | 0 | 0 | |
| 2014 | 0 | 0 | 0 | |
| 2015 | 0 | 0 | 0 | |
| 2016 | 12,050,000 | 1 | 0 | |
| 2017 | 5,000 | 1 | 0 | |
| 2018 | 189,360,000 | 5 | 0 | |
| 2019 | 0 | 0 | 0 | |
| 2020 | 0 | 0 | 0 | |
| 2021 | 94,500 | 1 | 0 | |
| 2022 | 0 | 0 | 0 | |
| 2023 | 8,100,000 | 2 | 0 | |
| 2024 | 110,000 | 2 | 0 | |
| 2025 | 0 | 0 | 0 | |
| 2026 | 0 | 0 | 0 |
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
Official beach and cyanobacteria (harmful blue-green algae) advisories are counted on water pages only.
Source: mi-egle-mienviro-cso-sso-list. Records cover January 1, 2001 to November 4, 2026.
Show table
| Year | Hours with a discharge or advisory status | Share of the year | Coverage |
|---|---|---|---|
| 2001 | 54 | 0.6% | |
| 2002 | 20 | 0.2% | |
| 2003 | 3 | 0.0% | |
| 2004 | 7 | 0.1% | |
| 2005 | 8 | 0.1% | |
| 2006 | 1 | 0.0% | |
| 2007 | 285 | 3.3% | |
| 2008 | 462 | 5.3% | |
| 2009 | 251 | 2.9% | |
| 2010 | 1 | 0.0% | |
| 2011 | 1 | 0.0% | |
| 2012 | 1 | 0.0% | |
| 2013 | 0 | 0.0% | |
| 2014 | 0 | 0.0% | |
| 2015 | 0 | 0.0% | |
| 2016 | 8 | 0.1% | |
| 2017 | 3 | 0.0% | |
| 2018 | 450 | 5.1% | |
| 2019 | 0 | 0.0% | |
| 2020 | 0 | 0.0% | |
| 2021 | 7 | 0.1% | |
| 2022 | 0 | 0.0% | |
| 2023 | 2 | 0.0% | |
| 2024 | 2 | 0.0% | |
| 2025 | 0 | 0.0% | |
| 2026 | 0 | 0.0% |
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.
Source: mi-egle-mienviro-cso-sso-list. Records cover January 1, 2001 to November 4, 2026.
Show table
| Month | Reported discharges | Years of records |
|---|---|---|
| January | 2 | 26 |
| February | 4 | 26 |
| March | 2 | 26 |
| April | 2 | 26 |
| May | 4 | 26 |
| June | 3 | 26 |
| July | 10 | 26 |
| August | 3 | 26 |
| September | 1 | 26 |
| October | 1 | 26 |
| November | 1 | 26 |
| December | 0 | 25 |
Reported discharges by wastewater outlet
Wastewater outlets with the most tracked discharge records: 10 of 15, all years. Counts depend on reporting coverage and do not measure legal compliance or harm.
Source: mi-egle-mienviro-cso-sso-list. Records cover January 1, 2001 to November 4, 2026.
Show table
| Wastewater outlet | Sewer operator | Reported discharges |
|---|---|---|
| 002 Plant retention basin 002 outfall | City of Niles | 17 |
| Grant St siphon overflow, west side - Tidal Valve on Grant St Siphon Structure | Niles | 2 |
| Main St. Bridge West End - Abandoned Interceptor Sewer | Niles | 2 |
| JD's Truck Stop - Business yard | City of Niles | 1 |
| Grant St. Siphon - East parking area of Corewell Health Hospital | City of Niles | 1 |
| Grant St. Siphon - Siphon Chamber under the St. Joe River | City of Niles WWTP | 1 |
| Progressive Drive lift station - lift station located on roadside [house number removed] Progressive Dr. Niles, MI 49120 | City of Niles | 1 |
| Private Residence Address - Force Main Break | Niles | 1 |
| 007 | Niles | 1 |
| Niles WWTP - RTB/Storage Tank | Niles | 1 |
| Other outlets (5) | 5 |
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.
- mi-egle-mienviro-cso-sso-list: records from January 1, 2001 to the latest update