Sanitary sewer overflow: Bristol Sanitary Sewer System, Sep 13, 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 (eRule Phase 2, current versions), record RISS00018:14:1, reported Sep 14, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice

Colours no water as of Nov 2, 2026, 6:56 AM EST: the windows on the methods page have passed, or the record has no time to count from.

A report is not a test of the water. See how statuses are worked out.

1. The reported outfall

Outfall reported by Bristol Sanitary Sewer System (RISS00018). Location: 41.65909, -71.26763, given in the source record.

2. Waters named in the notice

The notice names: “Bristol Harbor, Walkers Cove”. We place it on Narragansett Bay, MA. Matched by the record's coordinates to the nearest tracked water.

point 24 m from the water

3. Modeled downstream reach

Not modeled: the reach model runs on rivers above the head of tide only.

Source: water outlines from OpenBoatLaunch and OpenStreetMap contributors (ODbL); outfalls from EPA ECHO and the state outfall layers; modeled reaches computed by DirtyWaterWatch from USGS NLDI, NHDPlus and the nearest USGS gauge (Jobson 1996); basemap OpenFreeMap and OpenMapTiles.

Open on the main map

When: three different times

The time of the event, the time the source reported, published or updated it, and the time we fetched it are kept apart. Times are shown in New England time; the record keeps the original offsets.

Started: Sep 13, 2026, 7:00 PM EDT
Ended: Sep 13, 2026, 10:00 PM EDT
Precision: Known to the minute
Reported to the source: Sep 14, 2026, 8:00 PM EDT
Published: Oct 29, 2026, 8:00 PM EDT
Source last updated: Oct 30, 2026, 7:11 AM EDT
We fetched it: 2026-11-02 11:54 UTC

What and how much

Type: Sanitary sewer overflow
Status in the record: Ended (as reported)
Material: “untreated sewage”
Volume: 4,000 gal (estimated)
Volume in the source's words: “4,000 gallons (Best Professional Judgement)”

Advice

The record carries no advice text from EPA ECHO Sewer Overflow and Bypass Event report (reported to regulators).

Advice window: not stated in the record; the state's window on the methods page applies
Basis: not stated

What it does to the map, over time

Advisory in effect Narragansett Bay: Discharge in progress, Sep 13, 2026, 7:00 PM EDT to Sep 13, 2026, 10:00 PM EDT
Advisory in effect Narragansett Bay: Within the authority's advice window after the discharge ended, Sep 13, 2026, 10:00 PM EDT to Sep 15, 2026, 10:00 PM EDT
Caution Narragansett Bay: Within the site's caution window after the discharge ended (data/rules.json), Sep 15, 2026, 10:00 PM EDT to Sep 16, 2026, 10:00 PM EDT

Source: intervals computed by DirtyWaterWatch (build/status.py) from this record and the rules on the methods page, as of 2026-11-02 11:56 UTC.

Source and revisions

Source: ECHO NPDES Sewer Overflow and Bypass Event Dataset (eRule Phase 2, current versions)
Record id at the source: RISS00018:14:1
Original notice: https://echo.epa.gov/detailed-facility-report?fid=RISS00018&sys=ICP
Revision of: none (first record)
Revised by: no later revision

Every field of the record

All fields of event echo-sewer-overflow:RISS00018:14:1
`event_id`	echo-sewer-overflow:RISS00018:14:1
`source_id`	echo-sewer-overflow
`source_record_id`	RISS00018:14:1
`parent_event_id`	null
`event_type`	sso
`status`	ended
`discharger_id`	null
`discharger_name`	Bristol Sanitary Sewer System
`npdes_permit`	RISS00018
`outfall_id`	null
`outfall_name`	null
`waterbody_text`	Bristol Harbor, Walkers Cove
`water_slugs`	["narragansett-bay-ma"]
`water_match`	geometry
`lat`	41.659086
`lon`	-71.267632
`coord_source`	source
`coord_precision_m`	null
`started_at`	2026-09-13T19:00:00
`ended_at`	2026-09-13T22:00:00
`time_precision`	minute
`reported_at`	2026-09-15
`published_at`	2026-10-30
`source_updated_at`	2026-10-30T11:11:23Z
`fetched_at`	2026-11-02T11:54:48Z
`material`	untreated sewage
`volume_gal`	4000
`volume_text`	4,000 gallons (Best Professional Judgement)
`estimate_flag`	estimated
`authority`	EPA ECHO Sewer Overflow and Bypass Event report (reported to regulators)
`advice_text`	null
`advice_window_hours`	null
`advice_window_basis`	null
`source_url`	https://echo.epa.gov/detailed-facility-report?fid=RISS00018&sys=ICP
`parse_error`	null
`fixture`	false
`file`	events/echo-sewer-overflow~3ARISS00018~3A14~3A1.json
`duplicate_of`	null
`placement_note`	point 24 m from the water
`unplaced_reason`	null
`set_aside`	null
`superseded`	null
`reach`	null
`reach_band`	null

The source's record (raw)

{
  "sewer_overflow_bypass_event_key": "27411",
  "permit_identifier": "RISS00018",
  "program_report_form_set_id": "14",
  "program_report_form_id": "1",
  "sewer_overflow_bypass_event_id_ext": "1",
  "program_report_received_date": "2026-09-15",
  "program_report_start_date": "2026-09-13",
  "program_report_end_date": "2026-09-13",
  "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": "319538485",
  "transaction_type": "N",
  "sewer_overflow_bypass_description_text": "Pump Station, high I & I, not able to keep up with flow",
  "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",
  "sewer_overflow_structure_type_code": "MAN",
  "sewer_overflow_structure_type_desc": "Manhole",
  "collection_system_identifier": "001",
  "latitude_measure": "41.659086",
  "longitude_measure": "-71.267632",
  "sewer_overflow_bypass_duration_hours": "3.00",
  "sewer_overflow_bypass_start_datetime": "2026-09-13 19:00:00",
  "sewer_overflow_bypass_end_datetime": "2026-09-13 22:00:00",
  "discharge_quantification_method_code": "BPJ",
  "discharge_quantification_method_desc": "Best Professional Judgement",
  "sewer_overflow_bypass_discharge_volume_gallons": "4000.00",
  "event_transaction_type": "N",
  "collection_system_owner_type_code": "CTG",
  "collection_system_owner_type_desc": "Municipality",
  "collection_system_population": "21100",
  "types": [
    "Sanitary Sewer Overflow Event"
  ],
  "receiving_waters": [
    "Bristol Harbor, Walkers Cove"
  ],
  "impacts": [
    {
      "code": "SBC",
      "desc": "Shellfish Bed Contamination",
      "other": null
    }
  ],
  "causes": [
    {
      "code": "HLI",
      "desc": "High Levels of Inflow and/or Infiltration",
      "other": null
    }
  ],
  "corrective_actions": [
    {
      "code": "OTH",
      "desc": "Other",
      "other": "Plans to remove station in the works, low pressure force main will replace station."
    }
  ],
  "treatment": [],
  "collection_system_name": "Bristol Sanitary Sewer System",
  "percent_collection_system_css": "0",
  "reached_water_rule": "receiving water named",
  "timezone_note": "ECHO gives event times without a timezone; recorded as given (presumably local time)",
  "report_version": "1"
}

Personal fields (names, emails, phone numbers of staff) are removed from raw records before they are stored.