Treatment bypass reported — ILLINOIS AMERICAN WATER COMPANY - GRANITE CITY WWTP, Sep 22, 2026

Record details

Original source data

{
  "permit_identifier": "IL0033481",
  "program_report_form_set_id": "28",
  "program_report_form_id": "1",
  "sewer_overflow_bypass_event_key": "27353",
  "sewer_overflow_bypass_event_id_ext": "1",
  "sewer_overflow_bypass_description_text": "Planned power outage",
  "sewer_overflow_bypass_reporting_requirement_code": "4",
  "sewer_overflow_reporting_requirement_desc": "Anticipated bypass notice",
  "latitude_measure": "38.694444",
  "longitude_measure": "-90.180833",
  "sewer_overflow_bypass_duration_hours": "9.00",
  "sewer_overflow_bypass_start_datetime": "2026-09-22 12:00:00",
  "sewer_overflow_bypass_end_datetime": "2026-09-22 21:00:00",
  "discharge_quantification_method_code": "BPJ",
  "discharge_quantification_method_desc": "Best Professional Judgement",
  "sewer_overflow_bypass_discharge_volume_gallons": "3000000.00",
  "anticipated_bypass_text": "The plants power will be shut down to change a transformer. All water will be diverted to the combined overflow tanks. Once power is restored the water will be brought back to the plant. No discharge is anticipated.",
  "anticipated_bypass_expect_limit_violation": "N",
  "payload_id": "319096429",
  "event_transaction_type": "N",
  "program_report_received_date": "2026-09-10",
  "program_report_start_date": "2026-09-22",
  "program_report_end_date": "2026-09-22",
  "electronic_submission_type_code": "ES1",
  "electr_submission_type_desc": "EPA electronic reporting system",
  "program_report_npdes_data_group_number_code": "G9C",
  "transaction_type": "N",
  "types": [
    "Bypass Event"
  ],
  "receiving_waters": [
    "Mississippi River "
  ],
  "impacts": [
    {
      "code": "NOI",
      "desc": "No observable impacts",
      "other": null
    }
  ],
  "causes": [
    {
      "code": "OTE",
      "desc": "Other Cause at Treatment Plant - Electrical Failure",
      "other": "replacing transformer"
    }
  ],
  "corrective_actions": [
    {
      "code": "FEP",
      "desc": "Fix Electrical Problem",
      "other": null
    }
  ],
  "treatment": [
    {
      "code": null,
      "desc": null,
      "bypassed_equipment": "Primary treatment equipment"
    }
  ],
  "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"
}

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