Sanitary sewer overflow (SSO) reported — TOWN OF JOHNSTON WWCS, Jul 16, 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 RISS00005:9:1, reported Jul 16, 2026, 12:00 AM EDT, retrieved 2026-11-02 15:54 UTC · Read the original notice

Current status from this report

This report does not set a map status as of Nov 2, 2026, 11:21 AM 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: TOWN OF JOHNSTON WWCS (federal wastewater discharge permit, NPDES, RISS00005). Outlet: not stated. Location: 41.84873, -71.49334; 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: “Assapumpset Brook”. 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.

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: Jul 16, 2026, 1:29 PM EDT
Ended: Jul 16, 2026, 2:05 PM EDT
Detail provided by the source: Times known to the minute
Reported to the source: Jul 16, 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: 2026-11-02 15:54 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: 180 gallons (estimated)
Volume as reported: “180 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: RISS00005:9:1
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:RISS00005:9:1
Source identifier	echo-sewer-overflow
Source record number	RISS00005:9:1
Earlier version	Not provided
Type	Sanitary sewer overflow (SSO)
Status in the report	Ended (as reported)
Sewer operator identifier	Not provided
Sewer operator	TOWN OF JOHNSTON WWCS
Federal wastewater discharge permit (NPDES)	RISS00005
Outlet number	Not provided
Outlet name	Not provided
Water named in the report	Assapumpset Brook
Linked waters	Not provided
How this report was linked to the water	not linked to a mapped water
Latitude	41.849
Longitude	-71.493
Location source	given in the source record
Location accuracy, in metres	Not provided
Started	Jul 16, 2026, 1:29 PM EDT (2026-07-16T13:29:00)
Ended	Jul 16, 2026, 2:05 PM EDT (2026-07-16T14:05:00)
Detail provided by the source	to the minute
Reported to the source	Jul 16, 2026, 12:00 AM EDT (2026-07-16)
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, 10:54 AM EST (2026-11-02T15:54:40Z)
Material	untreated sewage
Volume, in gallons	180
Volume as reported	180 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=RISS00005&sys=ICP

Original source data

{
  "sewer_overflow_bypass_event_key": "26483",
  "permit_identifier": "RISS00005",
  "program_report_form_set_id": "9",
  "program_report_form_id": "1",
  "sewer_overflow_bypass_event_id_ext": "1",
  "program_report_received_date": "2026-07-16",
  "program_report_start_date": "2026-07-16",
  "program_report_end_date": "2026-07-16",
  "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": "314307402",
  "transaction_type": "N",
  "sewer_overflow_bypass_description_text": "overflow out of manhole",
  "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": "BRO",
  "sewer_overflow_structure_type_desc": "Broken Pipe",
  "collection_system_identifier": "001",
  "latitude_measure": "41.848729",
  "longitude_measure": "-71.493336",
  "sewer_overflow_bypass_duration_hours": "0.60",
  "sewer_overflow_bypass_start_datetime": "2026-07-16 13:29:00",
  "sewer_overflow_bypass_end_datetime": "2026-07-16 14:05:00",
  "discharge_quantification_method_code": "BPJ",
  "discharge_quantification_method_desc": "Best Professional Judgement",
  "sewer_overflow_bypass_discharge_volume_gallons": "180.00",
  "event_transaction_type": "N",
  "collection_system_owner_type_code": "CTG",
  "collection_system_owner_type_desc": "Municipality",
  "collection_system_population": "15900",
  "types": [
    "Sanitary Sewer Overflow Event"
  ],
  "receiving_waters": [
    "Assapumpset Brook"
  ],
  "impacts": [
    {
      "code": "NOI",
      "desc": "No observable impacts",
      "other": null
    }
  ],
  "causes": [
    {
      "code": "BPO",
      "desc": "Broken Pipe - Other",
      "other": null
    }
  ],
  "corrective_actions": [
    {
      "code": "FBP",
      "desc": "Fix Broken Pipe",
      "other": null
    }
  ],
  "treatment": [],
  "collection_system_name": "TOWN OF JOHNSTON WWCS",
  "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"
}

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