New Hampshire / Reports /

Combined sewer overflow (CSO) reported — City of Nashua Wastewater Department, May 25, 2026

Ended (as reported) · City of Nashua Wastewater Department (History of CSO Occurrences PDF)

Source: City of Nashua Wastewater Department (History of CSO Occurrences PDF), record nashua:2026-05-25:008, the source gives no report time, retrieved 2026-11-02 15:54 UTC · Read the original notice

Read the original notice · Report an error

1. Reported wastewater outlet

Operator named in the record: City of Nashua Wastewater Department (federal wastewater discharge permit, NPDES, NH0100170). Outlet: 008 “Broad St.”. Location: 42.77001, -71.48805; location source: from the state's or EPA's outfall layer.

Outfall: a pipe or outlet where wastewater enters a water body.

Source: EPA ECHO wastewater outlet records, permit NH0100170, outlet 008. Location linked by DirtyWaterWatch.

2. Waters named in the notice

The notice names: “Nashua River”. DirtyWaterWatch links this report to Nashua River, NH. Match basis: the outlet's permit and number in EPA and state records.

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

May 25, 2026

Ended

not reported

Detail provided by the source

Times known to the day only

Reported to the source

not given

Published

not given

Source last updated

not given

Last retrieved by DirtyWaterWatch

2026-11-02 15:54 UTC

What and how much

Type

Combined sewer overflow (CSO): sewage mixed with rainwater spills from a shared sewer system.

Status in the record

Ended (as reported)

Material

“combined sewage and stormwater (CSO)”

Volume

10,000 gallons (not stated whether estimated or measured)

Volume as reported

“0.010 MG”

Advice from City of Nashua Wastewater Department (History of CSO Occurrences PDF)

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

• No current status shown Merrimack River: End not confirmed, Jun 24, 2026, 12:00 AM EDT to Aug 23, 2026, 12:00 AM EDT
• No current status shown Merrimack River: End not confirmed, Jun 24, 2026, 12:00 AM EDT to Aug 23, 2026, 12:00 AM EDT
• No current status shown Nashua River: End not confirmed, Jun 24, 2026, 12:00 AM EDT to Aug 23, 2026, 12:00 AM EDT

Source: DirtyWaterWatch calculations using this report and the published status rules. Updated 2026-11-02 15:57 UTC.

Source and versions

Source

History of CSO Occurrences PDF

Source record number

nashua:2026-05-25:008

Original notice

Read the original notice

Earlier version

None: this is the first record

Later versions

None

{
  "date": "5/25/2026",
  "outfall": "CSO 008",
  "total_flow_mg": "0.010",
  "duration_min": 45,
  "table_year": "2026"
}