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Illinois / Sewer operators /

Illinois American Water (Jerseyville STP)

Sewer utility · Illinois

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).

Federal wastewater discharge permit (NPDES)
IL0024465
Wastewater outlets
2 treatment plant outfalls listed by EPA or state agencies; 6 places named in its own overflow reports (provisional locations) · List
Waters listed as receiving wastewater
An unnamed tributary to DeArcy Branch; De Archy Branch; Phils Creek; Unnamed Tributary to Phil's Creek
Tracked waters
Sandy Creek, IL, Phils Creek, IL
Discharge records counted
16 records · latest
Total reported volume in these records
15,849,797 gallons across the 15 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: Illinois American Water (Jerseyville STP)'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.

2 treatment plant outfalls listed by EPA or state agencies; 6 places named in its own overflow reports (provisional locations).

Treatment plant outfalls

2 outfalls

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)

6 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 Jul 21, 2025 · confidence high · no water record yet
  • Reported place · 2 overflow reports, latest Jul 21, 2025 · confidence high · no water record yet
  • Reported place · 1 overflow report, latest Mar 23, 2026 · confidence medium · no water record yet
  • Reported place · 1 overflow report, latest Jul 27, 2025 · confidence medium · no water record yet
  • Reported place · 1 overflow report, latest Jul 27, 2025 · confidence medium · no water record yet
  • Reported place · 1 overflow report, latest Jul 27, 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

Treatment bypass: wastewater skips one or more treatment steps. Sanitary sewer overflow (SSO): sewage spills from a sewer meant to carry sewage separately from rainwater.

Reports linked to Illinois American Water (Jerseyville STP), newest first
WhenReportStatus
to May 8, 1:00 PM CDTSandy Creek · Bypass · 2.07 million gallons report · notice · mapended
to May 1, 8:00 AM CDTSandy Creek · Bypass · 2.41 million gallons report · notice · mapended
to 3:30 PM CDT“unnamed tributary to DeArcy Branch” · SSO · 1,800 gallons report · notice · mapended
to Jul 31 ’25, 7:00 PM CDTSandy Creek · Bypass · 4.4 million gallons report · notice · mapended
to 11:15 PM CDT“unnamed tributary to DeArcy Branch” · SSO · 375,000 gallons in all mapended
to Jul 24 ’25, 2:00 AM CDTSandy Creek · Bypass · 1.3 million gallons report · notice · mapended
to 6:30 PM CDT“unnamed tributary to DeArcy Branch” · SSO · 170,000 gallons in all mapended
to May 5 ’25, 4:00 PM CDTSandy Creek · Bypass · 670,000 gallons report · notice · mapended
to Apr 22 ’25, 12:00 PM CDTSandy Creek · Bypass · 219,000 gallons report · notice · mapended
to Apr 10 ’25, 2:00 PM CDTSandy Creek · Bypass · 3.22 million gallons report · notice · mapended
to Apr 5 ’25, 8:00 AM CDT“unnamed tributary to DeArcy Branch” · SSO · 1.01 million gallons in all mapended
to Nov 5 ’24Sandy Creek · SSO · volume not reported 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 (3 from Illinois American Water (Jerseyville STP)) · 2025 (12 from Illinois American Water (Jerseyville STP)) · 2024 (1 from Illinois American Water (Jerseyville STP))

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.

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 2026-11-06 09:03 UTC.

Reported discharges over time

  • Discharges reported by Illinois American Water (Jerseyville STP), last 12 months3December 2025 to November 2026Verified reports where available, else notices; revisions and duplicates counted once.
  • Days with a discharge reported by Illinois American Water (Jerseyville STP), last 12 months10December 2025 to November 2026A day counts once however many discharges were under way on it.
  • Hours with a discharge or advisory status from Illinois American Water (Jerseyville STP)'s reports, last 12 months162December 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. Blended discharge: wastewater that skipped some treatment is mixed with treated wastewater.

Reported discharges per month

16 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.

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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.

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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.

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Reported volume per year

Gallons (axis: K thousand, M million), summed from the 15 reports that gave a volume as a number (1 did not).

  • Incomplete source coverage
Limited records

1 of 16 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.

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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.

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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)