Illinois / Reports /

Sanitary sewer overflow (SSO) reported, Aug 11, 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 IL0064998:2:1, reported Aug 13, 2026, 12:00 AM CDT, retrieved 2026-11-06 08:38 UTC · Read the original notice

Read the original notice · Report an error

1. Reported wastewater outlet

Operator named in the record: City of Crest Hill (federal wastewater discharge permit, NPDES, IL0064998). Outlet: not stated. Location: 41.56611, -88.08417; 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: “Des Plaines River”. DirtyWaterWatch links this report to Des Plaines River, IL. Match basis: the water named in the report.

3. Estimated downstream stretch

No downstream estimate is available for this report.

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

Aug 11, 2026

Ended

Aug 12, 2026

Detail provided by the source

Times known to the day only

Reported to the source

Aug 13, 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

volume not reported (not stated whether estimated or measured)

Volume as reported

none

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 Des Plaines River: Discharge reported ongoing, Aug 10, 2026, 11:00 PM CDT to Aug 12, 2026, 11:00 PM CDT
• Caution Des Plaines River: Within the caution period after the reported end, Aug 12, 2026, 11:00 PM CDT to Aug 15, 2026, 11:00 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

IL0064998:2:1

Original notice

Read the original notice

Earlier version

None: this is the first record

Later versions

None

{
  "permit_identifier": "IL0064998",
  "program_report_form_set_id": "2",
  "program_report_form_id": "1",
  "sewer_overflow_bypass_event_key": "27073",
  "sewer_overflow_bypass_event_id_ext": "1",
  "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",
  "latitude_measure": "41.566111",
  "longitude_measure": "-88.084167",
  "payload_id": "316437963",
  "event_transaction_type": "N",
  "program_report_received_date": "2026-08-13",
  "program_report_start_date": "2026-08-11",
  "program_report_end_date": "2026-08-12",
  "electronic_submission_type_code": "ES1",
  "electr_submission_type_desc": "EPA electronic reporting system",
  "program_report_npdes_data_group_number_code": "G9B",
  "transaction_type": "N",
  "types": [
    "Sanitary Sewer Overflow Event"
  ],
  "receiving_waters": [
    "Des Plaines River"
  ],
  "impacts": [],
  "causes": [
    {
      "code": "OCE",
      "desc": "Other Cause in Sewer Collection System - Electrical Failure",
      "other": "Power company- Wide Spread Power Outage, transformer blew, power lines down, severe weather"
    }
  ],
  "corrective_actions": [],
  "treatment": [],
  "collection_system_name": null,
  "percent_collection_system_css": null,
  "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",
  "extreme_event_note": "G9B extreme-event report: spills too numerous to list; times are the report period"
}