Sanitary sewer overflow (SSO) reported — MOLINE - NORTH SLOPE STP SSCS, Sep 20, 2026

Ended (as reported) · EPA ECHO Sewer Overflow and Bypass Event report (reported to regulators)

Source: EPA ECHO Sewer Overflow and Bypass Event report (reported to regulators), record IL0029947:4:1, reported Sep 20, 2026, 12:00 AM CDT, retrieved 2026-11-06 08:38 UTC · Read the original notice

Current status from this report

This report does not set a map status as of Nov 6, 2026, 3:03 AM CST. Check its dates and the status rules.

A report is not a test of the water. See how we assign statuses.

Read the original notice · Report an error

1. Reported wastewater outlet

Operator named in the record: MOLINE - NORTH SLOPE STP SSCS (federal wastewater discharge permit, NPDES, IL0029947). Outlet: not stated. Location: 41.51488, -90.48257; location source: given in the source record.

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

2. Waters named in the notice

The notice names: “Mississippi River”. DirtyWaterWatch links this report to Mississippi River, IL. Match basis: the water named in the report.

3. Estimated downstream stretch

No downstream estimate is available for this report.

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.

Open on the main map

When it happened and when it was reported

Event and notice times use Eastern Time (EST or EDT). Retrieval times use Coordinated Universal Time (UTC).

Started: Sep 20, 2026, 9:06 AM CDT
Ended: Sep 20, 2026, 6:08 PM CDT
Detail provided by the source: Times known to the minute
Reported to the source: Sep 20, 2026, 12:00 AM CDT
Published: Nov 4, 2026, 12:00 AM CST
Source last updated: Nov 4, 2026, 6:21 AM CST
Last retrieved by DirtyWaterWatch: 2026-11-06 08:38 UTC

What and how much

Type: Sanitary sewer overflow (SSO): sewage spills from a sewer meant to carry sewage separately from rainwater.
Status in the record: Ended (as reported)
Material: “untreated sewage”
Volume: 135,500 gallons (estimated)
Volume as reported: “135,500 gallons (Best Professional Judgement)”

Advice from EPA ECHO Sewer Overflow and Bypass Event report (reported to regulators)

This report includes no advice. Check current local health notices.

Advice period: This report does not state a period. See the rule DirtyWaterWatch applies and its source.
Basis: not stated

Status history from this report

Discharge or advisory reported Mississippi River: Discharge reported ongoing, Sep 20, 2026, 9:06 AM CDT to Sep 20, 2026, 6:08 PM CDT
Caution Mississippi River: Within the caution period after the reported end, Sep 20, 2026, 6:08 PM CDT to Sep 23, 2026, 6:08 PM CDT

Source: DirtyWaterWatch calculations using this report and the published status rules. Updated 2026-11-06 09:03 UTC.

Source and versions

Source: Public source
Source record number: IL0029947:4:1
Original notice: Read the original notice
Earlier version: None: this is the first record
Later versions: None

Record details

Record details
Record identifier	echo-sewer-overflow:IL0029947:4:1
Source identifier	echo-sewer-overflow
Source record number	IL0029947:4:1
Earlier version	Not provided
Type	Sanitary sewer overflow (SSO)
Status in the report	Ended (as reported)
Sewer operator identifier	Not provided
Sewer operator	MOLINE - NORTH SLOPE STP SSCS
Federal wastewater discharge permit (NPDES)	IL0029947
Outlet number	Not provided
Outlet name	Not provided
Water named in the report	Mississippi River
Linked waters	mississippi-river-il
How this report was linked to the water	the water named in the report
Latitude	41.515
Longitude	-90.483
Location source	given in the source record
Location accuracy, in metres	Not provided
Started	Sep 20, 2026, 9:06 AM CDT (2026-09-20T09:06:00-05:00)
Ended	Sep 20, 2026, 6:08 PM CDT (2026-09-20T18:08:00-05:00)
Detail provided by the source	to the minute
Reported to the source	Sep 20, 2026, 12:00 AM CDT (2026-09-20)
Published	Nov 4, 2026, 12:00 AM CST (2026-11-04)
Source last updated	Nov 4, 2026, 6:21 AM CST (2026-11-04T12:21:15Z)
Last retrieved by DirtyWaterWatch	Nov 6, 2026, 2:38 AM CST (2026-11-06T08:38:59Z)
Material	untreated sewage
Volume, in gallons	135,500
Volume as reported	135,500 gallons (Best Professional Judgement)
How volume was determined	estimated
Authority	EPA ECHO Sewer Overflow and Bypass Event report (reported to regulators)
Advice	Not provided
Advice period, in hours	Not provided
Basis of the advice period	Not provided
Original notice	https://echo.epa.gov/detailed-facility-report?fid=IL0029947&sys=ICP

Original source data

{
  "permit_identifier": "IL0029947",
  "program_report_form_set_id": "4",
  "program_report_form_id": "1",
  "sewer_overflow_bypass_event_key": "27466",
  "sewer_overflow_bypass_event_id_ext": "1",
  "sewer_overflow_bypass_description_text": "Severe weather event",
  "sewer_overflow_bypass_reporting_requirement_code": "1",
  "sewer_overflow_reporting_requirement_desc": "5-day reporting for noncompliance that may endanger health or the environment",
  "wet_weather_occurance_indicator": "Y",
  "sewer_overflow_structure_type_code": "MAN",
  "sewer_overflow_structure_type_desc": "Manhole",
  "collection_system_identifier": "001",
  "latitude_measure": "41.514880",
  "longitude_measure": "-90.482571",
  "sewer_overflow_bypass_duration_hours": "9.03",
  "sewer_overflow_bypass_start_datetime": "2026-09-20 09:06:00",
  "sewer_overflow_bypass_end_datetime": "2026-09-20 18:08:00",
  "discharge_quantification_method_code": "BPJ",
  "discharge_quantification_method_desc": "Best Professional Judgement",
  "sewer_overflow_bypass_discharge_volume_gallons": "135500.00",
  "payload_id": "320108489",
  "event_transaction_type": "N",
  "program_report_received_date": "2026-09-20",
  "program_report_start_date": "2026-09-20",
  "program_report_end_date": "2026-09-20",
  "electronic_submission_type_code": "ES1",
  "electr_submission_type_desc": "EPA electronic reporting system",
  "program_report_npdes_data_group_number_code": "G9A",
  "transaction_type": "N",
  "collection_system_owner_type_code": "CTG",
  "collection_system_owner_type_desc": "Municipality",
  "collection_system_population": "42985",
  "types": [
    "Sanitary Sewer Overflow Event"
  ],
  "receiving_waters": [
    "Mississippi River"
  ],
  "impacts": [
    {
      "code": "NOI",
      "desc": "No observable impacts",
      "other": null
    }
  ],
  "causes": [
    {
      "code": "HLI",
      "desc": "High Levels of Inflow and/or Infiltration",
      "other": null
    }
  ],
  "corrective_actions": [
    {
      "code": "DIS",
      "desc": "Disinfection Treatment of Sewer Overflow or Bypass",
      "other": null
    }
  ],
  "treatment": [],
  "collection_system_name": "MOLINE - NORTH SLOPE STP SSCS",
  "percent_collection_system_css": "0",
  "reached_water_rule": "receiving water named",
  "timezone_note": "ECHO gives event times without a timezone; read as America/Chicago, the permit's state's zone (a fall-back hour that happens twice is read as the first)",
  "report_version": "1"
}

Staff names, email addresses and phone numbers are removed from source data before it is stored.