Sanitary sewer overflow (SSO) reported — District of Columbia Water and Sewer Authority (DC Water), May 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) via ECHO NPDES Sewer Overflow and Bypass Event Dataset, record DC0021199:110:1, reported May 26, 2026, 12:00 AM EDT, retrieved 2026-11-03 02:28 UTC · Read the original notice

Current status from this report

This report does not set a map status as of Nov 2, 2026, 9:43 PM EST. Check its dates and the status rules.

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

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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: 38.87550, -76.96044; 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: “Pope Branch”. DirtyWaterWatch links this report to Pope Branch, DC. 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.

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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: May 20, 2026, 9:47 PM EDT
Ended: May 21, 2026, 2:00 AM EDT
Detail provided by the source: Times known to the minute
Reported to the source: May 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 02:28 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: 10,000 gallons (estimated)
Volume as reported: “10,000 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

Source and versions

Source: ECHO NPDES Sewer Overflow and Bypass Event Dataset
Source record number: DC0021199:110:1
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:DC0021199:110:1
Source identifier	echo-sewer-overflow
Source record number	DC0021199:110:1
Earlier version	Not provided
Type	Sanitary sewer overflow (SSO)
Status in the report	Ended (as reported)
Sewer operator identifier	dc-dc0021199
Sewer operator	District of Columbia Water and Sewer Authority (DC Water)
Federal wastewater discharge permit (NPDES)	DC0021199
Outlet number	Not provided
Outlet name	Not provided
Water named in the report	Pope Branch
Linked waters	pope-branch-dc
How this report was linked to the water	the water named in the report
Latitude	38.875
Longitude	-76.96
Location source	given in the source record
Location accuracy, in metres	Not provided
Started	May 20, 2026, 9:47 PM EDT (2026-05-20T21:47:00)
Ended	May 21, 2026, 2:00 AM EDT (2026-05-21T02:00:00)
Detail provided by the source	to the minute
Reported to the source	May 26, 2026, 12:00 AM EDT (2026-05-26)
Published	Nov 2, 2026, 12:00 AM EST (2026-11-02)
Source last updated	Nov 2, 2026, 7:15 AM EST (2026-11-02T12:15:51Z)
Last retrieved by DirtyWaterWatch	Nov 2, 2026, 9:28 PM EST (2026-11-03T02:28:52Z)
Material	untreated sewage
Volume, in gallons	10,000
Volume as reported	10,000 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=DC0021199&sys=ICP

Original source data

{
  "sewer_overflow_bypass_event_key": "9387",
  "permit_identifier": "DC0021199",
  "program_report_form_set_id": "110",
  "program_report_form_id": "1",
  "sewer_overflow_bypass_event_id_ext": "1",
  "program_report_received_date": "2026-05-26",
  "program_report_start_date": "2026-05-20",
  "program_report_end_date": "2026-05-21",
  "electronic_submission_type_code": "ES1",
  "electr_submission_type_desc": "EPA electronic reporting system",
  "program_report_npdes_data_group_number_code": "G9A",
  "program_report_npdes_data_group_desc": "Sewer Overflow/Bypass Event Report ",
  "payload_id": "310483547",
  "transaction_type": "N",
  "sewer_overflow_bypass_description_text": "SSO at 3211 M ST SE",
  "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": "N",
  "sewer_overflow_structure_type_code": "MAN",
  "sewer_overflow_structure_type_desc": "Manhole",
  "collection_system_identifier": "001",
  "latitude_measure": "38.875498",
  "longitude_measure": "-76.960435",
  "sewer_overflow_bypass_duration_hours": "4.22",
  "sewer_overflow_bypass_start_datetime": "2026-05-20 21:47:00",
  "sewer_overflow_bypass_end_datetime": "2026-05-21 02:00:00",
  "discharge_quantification_method_code": "BPJ",
  "discharge_quantification_method_desc": "Best Professional Judgement",
  "sewer_overflow_bypass_discharge_volume_gallons": "10000.00",
  "event_transaction_type": "N",
  "collection_system_owner_type_code": "CTG",
  "collection_system_owner_type_desc": "Municipality",
  "collection_system_population": "689545",
  "types": [
    "Sanitary Sewer Overflow Event"
  ],
  "receiving_waters": [
    "Pope Branch"
  ],
  "impacts": [
    {
      "code": "ODO",
      "desc": "Odors",
      "other": null
    },
    {
      "code": "OTH",
      "desc": "Other",
      "other": "UNKNOWN"
    }
  ],
  "causes": [
    {
      "code": "BFO",
      "desc": "Blockage - Fats/Oil/Grease",
      "other": null
    }
  ],
  "corrective_actions": [
    {
      "code": "FLU",
      "desc": "Sewer Flushing, Rodding, Blockage/Debris Removal",
      "other": null
    }
  ],
  "treatment": [],
  "collection_system_name": "D.C. WASA Sanitary Sewer System",
  "percent_collection_system_css": "56",
  "reached_water_rule": "receiving water named",
  "timezone_note": "ECHO gives event times without a timezone; recorded as given (presumably local time)",
  "report_version": "1"
}

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