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Sanitary sewer overflow (SSO) reported — District of Columbia Water and Sewer Authority (DC Water), Sep 23, 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) via ECHO NPDES Sewer Overflow and Bypass Event Dataset, record DC0021199:126:1, reported Sep 26, 2026, 12:00 AM EDT, retrieved 2026-11-03 09:34 UTC · Read the original notice

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1. Reported wastewater outlet

Operator named in the record: District of Columbia Water and Sewer Authority (DC Water) (federal wastewater discharge permit, NPDES, DC0021199). Outlet: not stated. Location: 38.81361, -77.02750; 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: “Anacostia River”. DirtyWaterWatch links this report to Anacostia River, DC. Match basis: the water named in the report.

3. Estimated downstream stretch

No downstream estimate is available for this report.

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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

Sep 23, 2026

Ended

Sep 23, 2026

Detail provided by the source

Times known to the day only

Reported to the source

Sep 26, 2026, 12:00 AM EDT

Published

Nov 2, 2026, 12:00 AM EST

Source last updated

Nov 2, 2026, 7:15 AM EST

Last retrieved by DirtyWaterWatch

2026-11-03 09:34 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 Anacostia River: Discharge reported ongoing, Sep 23, 2026, 12:00 AM EDT to Sep 24, 2026, 12:00 AM EDT
• Discharge or advisory reported Anacostia River: Post-discharge period applies, Sep 24, 2026, 12:00 AM EDT to Sep 25, 2026, 12:00 AM EDT
• Caution Anacostia River: Within the caution period after the reported end, Sep 25, 2026, 12:00 AM EDT to Sep 27, 2026, 12:00 AM EDT

Source: DirtyWaterWatch calculations using this report and the published status rules. Updated 2026-11-03 09:44 UTC.

Source and versions

Source

ECHO NPDES Sewer Overflow and Bypass Event Dataset

Source record number

DC0021199:126:1

Original notice

Read the original notice

Earlier version

None: this is the first record

Later versions

None

{
  "sewer_overflow_bypass_event_key": "27546",
  "permit_identifier": "DC0021199",
  "program_report_form_set_id": "126",
  "program_report_form_id": "1",
  "sewer_overflow_bypass_event_id_ext": "1",
  "program_report_received_date": "2026-09-26",
  "program_report_start_date": "2026-09-23",
  "program_report_end_date": "2026-09-23",
  "electronic_submission_type_code": "ES1",
  "electr_submission_type_desc": "EPA electronic reporting system",
  "program_report_npdes_data_group_number_code": "G9B",
  "program_report_npdes_data_group_desc": "Extreme Event Report",
  "payload_id": "320937665",
  "transaction_type": "N",
  "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": "38.813611",
  "longitude_measure": "-77.027500",
  "event_transaction_type": "N",
  "types": [
    "Sanitary Sewer Overflow Event"
  ],
  "receiving_waters": [
    "Anacostia river"
  ],
  "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; recorded as given (presumably local time)",
  "report_version": "1",
  "receiving_water_aliases": {
    "Anacostia river": "Anacostia River"
  },
  "extreme_event_note": "G9B extreme-event report: spills too numerous to list; times are the report period"
}