DirtyWaterWatch Public waters. Public record.

Illinois / Sewer operators /

Aqua Illinois, Inc.

Sewer utility · Illinois · Belvidere, Crete, University Park

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.

Ringed dots mark treatment plant outfalls. Small hollow diamonds mark places named in its overflow reports (provisional). Square boat markers mark boat launches listed by OpenBoatLaunch.

Federal wastewater discharge permit (NPDES)
IL0024473, IL0031798, IL0045527, IL0050202, IL0025089, IL0030627, IL0045501, IL0050717
Wastewater outlets
7 treatment plant outfalls listed by EPA or state agencies; 4 places named in its own overflow reports (provisional locations) · List
Waters listed as receiving wastewater
DEER CREEK; KLEMME CREEK; BEAVER CREEK; PLUM CREEK
Tracked waters
Beaver Creek, IL, Black Walnut Creek, IL, Kankakee River, IL, Trim Creek, IL, Deer Creek, IL
Discharge records counted
5 records · latest
Total reported volume in these records
72,599 gallons across the 4 records that give a volume (1 without one)

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 2026-11-06 09:03 UTC.

Public notices and alerts

We do not list an alert service for this operator yet. Check its website.

Source: Aqua Illinois, Inc.'s public notice and alert pages and the state's notification records.

Report a missing notice or error

Wastewater outlets

Outfall: a pipe or outlet where wastewater enters a water body.

7 treatment plant outfalls listed by EPA or state agencies; 4 places named in its own overflow reports (provisional locations).

Treatment plant outfalls

7 outfalls
  • Outfall 001 · receiving water in the permit: SOUTH BRANCH OF ROCK CREEK · no water record yet · status not published
  • Outfall A01 · receiving water in the permit: SOUTH BRANCH OF ROCK CREEK · no water record yet · status not published
  • Outfall B01 · receiving water in the permit: SOUTH BRANCH OF ROCK CREEK · no water record yet · status not published
  • Outfall 001 · receiving water in the permit: BLACK WALNUT CREEK · Black Walnut Creek, IL · status not published
  • Outfall 001 · receiving water in the permit: KANKAKEE RIVER · Kankakee River, IL · status not published
  • Outfall 001 · receiving water in the permit: BEAVER CREEK · Beaver Creek, IL · status not published
  • Outfall 001 · receiving water in the permit: UNNAMED TRIBUTARY TO TRIM CREEK · Trim Creek, IL · 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.

Places named in overflow reports (provisional)

4 places

Provisional location from overflow reports. Where the operator's own reports put an overflow: a manhole, pump station or plant. Not an outfall listed in a permit.

  • Reported place · 2 overflow reports, latest Aug 13, 2026 · confidence high · no water record yet
  • Reported place · 1 overflow report, latest Jun 14, 2026 · confidence medium · no water record yet
  • Reported place · 1 overflow report, latest Apr 20, 2026 · confidence medium · no water record yet
  • Reported place · 1 overflow report, latest Jul 30, 2025 · confidence medium · no water record yet

Source: the operator's own overflow reports to the state. DirtyWaterWatch groups reports within 50 metres into one place and finds the water below it with U.S. Geological Survey river maps (NLDI, NHDPlus). Not a permitted outfall; provisional until an official outfall record exists.

Reports and advisories

Sanitary sewer overflow (SSO): sewage spills from a sewer meant to carry sewage separately from rainwater.

Reports linked to Aqua Illinois, Inc., newest first
WhenReportStatus
to Aug 14Deer Creek · SSO · volume not reported report · notice · mapended
to 6:47 PM CDTWater not mapped · SSO · 20,000 gallons report · notice · mapended
to 6:40 PM CDTWater not mapped · SSO · 100 gallons report · notice · mapended
to Feb 9, 1:30 PM CSTDeer Creek · SSO · 37,499 gallons report · notice · mapended
to 9:00 PM CDTTrim Creek · SSO · 15,000 gallons report · notice · mapended

Sources: EPA ECHO Sewer Overflow and Bypass Event report (reported to regulators), retrieved 2026-11-06 08:38 UTC. A report's record id and times show when you hover or focus its "report" link.

Download these reports as CSV

All reports in Illinois by year: 2026 (4 from Aqua Illinois, Inc.) · 2025 (1 from Aqua Illinois, Inc.)

Other sewer operators on these waters

The last 90 days

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.
  • Caution: to
    1 report: Deer Creek 1
    Show records

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

  • Discharge or advisory reported: to
    1 report: Deer Creek 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 over time

  • Discharges reported by Aqua Illinois, Inc., last 12 months3December 2025 to November 2026Verified reports where available, else notices; revisions and duplicates counted once.
  • Days with a discharge reported by Aqua Illinois, Inc., last 12 months4December 2025 to November 2026A day counts once however many discharges were under way on it.
  • Hours with a discharge or advisory status from Aqua Illinois, Inc.'s reports, last 12 months52December 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.

Combined sewer overflow (CSO): sewage mixed with rainwater spills from a shared sewer system. Treatment bypass: wastewater skips one or more treatment steps. Blended discharge: wastewater that skipped some treatment is mixed with treated wastewater.

Reported discharges per month

3 reported discharges, January 2022 to November 2026.

  • Combined sewer overflow
  • Sanitary sewer overflow
  • Treatment bypass, blended or other
  • No tracked source for this period
  • Incomplete source coverage
Limited records

No tracked source covers January 2022 to April 2022. The U.S. Environmental Protection Agency's sewer overflow records are limited: they hold only what operators file with the agency.

Source: U.S. Environmental Protection Agency sewer overflow records. Records cover May 3, 2022 to November 6, 2026.

Show table

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
  • No tracked source for this period
  • Incomplete source coverage
Limited records

No tracked source covers January 2022 to April 2022. 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.

Source: U.S. Environmental Protection Agency sewer overflow records. Records cover May 3, 2022 to November 6, 2026.

Show table

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.

  • No tracked source for this period
  • Incomplete source coverage
Limited records

No tracked source covers January 2022 to April 2022.

Source: U.S. Environmental Protection Agency sewer overflow records. Records cover May 3, 2022 to November 6, 2026.

Show table

Reported volume per year

Gallons (axis: K thousand, M million), summed from the 2 reports that gave a volume as a number (1 did not).

  • Incomplete source coverage
Limited records

1 of 3 discharge reports gave no volume as a number; only numbers are summed.

Source: U.S. Environmental Protection Agency sewer overflow records. Records cover May 3, 2022 to November 6, 2026.

Show table

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
Limited records

Official beach and cyanobacteria (harmful blue-green algae) advisories are counted on water pages only.

Source: U.S. Environmental Protection Agency sewer overflow records. Records cover May 3, 2022 to November 6, 2026.

Show table

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: U.S. Environmental Protection Agency sewer overflow records. Records cover May 3, 2022 to November 6, 2026.

Show table
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)