Illinois / Reports /

Treatment bypass reported, Aug 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 IL0031429:4:1, reported Aug 21, 2026, 12:00 AM CDT, retrieved 2026-11-06 08:38 UTC · Read the original notice

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1. Reported wastewater outlet

Operator named in the record: Village of Tilton (federal wastewater discharge permit, NPDES, IL0031429). Outlet: not stated. Location: 40.10833, -87.64167; 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: “Big Vermilion”. Not linked to a mapped water.

3. Estimated downstream stretch

We estimate routes only on rivers before they become tidal. We do not estimate routes through tidal water or lakes.

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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 20, 2026

Ended

Aug 20, 2026

Detail provided by the source

Times known to the day only

Reported to the source

Aug 21, 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

Treatment bypass: wastewater skips one or more treatment steps.

Status in the record

Ended (as reported)

Material

“wastewater diverted around part of the treatment process”

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

Source and versions

Source

Public source

Source record number

IL0031429:4:1

Original notice

Read the original notice

Earlier version

None: this is the first record

Later versions

None

{
  "permit_identifier": "IL0031429",
  "program_report_form_set_id": "4",
  "program_report_form_id": "1",
  "sewer_overflow_bypass_event_key": "27174",
  "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": "40.108333",
  "longitude_measure": "-87.641667",
  "payload_id": "317369129",
  "event_transaction_type": "N",
  "program_report_received_date": "2026-08-21",
  "program_report_start_date": "2026-08-20",
  "program_report_end_date": "2026-08-20",
  "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": [
    "Bypass Event"
  ],
  "receiving_waters": [
    "Big Vermilion"
  ],
  "impacts": [],
  "causes": [
    {
      "code": "FCS",
      "desc": "Flooding of Collection System - Hurricane or Large Stormwater Event",
      "other": null
    }
  ],
  "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"
}