New Hampshire / Events /

Treatment plant bypass: Town of Exeter WWTP, Sep 17, 2026

Ended (as reported) · Town of Exeter DPW (Combined Sewer & Sanitary Sewer Overflows page)

Source: Town of Exeter DPW (Combined Sewer & Sanitary Sewer Overflows page) via nh-permittees, record exeter:bypass:2026-09-17:1, the source gives no report time, retrieved 2026-11-02 11:55 UTC · notice

1. The reported outfall

Outfall reported by Town of Exeter WWTP (NH0100871): “Wastewater Treatment Plant”. Location: no coordinates in the record or the outfall registry.

2. Waters named in the notice

The notice names: “Squamscott River”. We place it on Squamscott River, NH. Matched by the name of the water in the source record.

3. Modeled downstream reach

No modeled reach for this record in this build.

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 17, 2026, 11:46 PM EDT

Ended

Sep 17, 2026, 11:48 PM EDT

Precision

Known to the minute

Reported to the source

not given

Published

not given

Source last updated

not given

We fetched it

2026-11-02 11:55 UTC

What and how much

Type

Treatment plant bypass

Status in the record

Ended (as reported)

Material

“non-disinfected treated effluent”

Volume

488 gal (not stated whether estimated or measured)

Volume in the source's words

“488 gallons”

Advice

The record carries no advice text from Town of Exeter DPW (Combined Sewer & Sanitary Sewer Overflows page).

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 Squamscott River: Discharge in progress, Sep 17, 2026, 11:46 PM EDT to Sep 17, 2026, 11:48 PM EDT
• Advisory in effect Squamscott River: Within the authority's advice window after the discharge ended, Sep 17, 2026, 11:48 PM EDT to Sep 20, 2026, 11:48 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

nh-permittees

Record id at the source

exeter:bypass:2026-09-17:1

Original notice

https://www.exeternh.gov/publicworks/combined-sewer-sanitary-sewer-…

Revision of

none (first record)

Revised by

no later revision

{
  "section": "Non-disinfected Discharge",
  "text": "September 17, 2026 - Due to an unexpected power outage at 11:46 p.m. for 2 minutes, a non-disinfected discharge of 488 gallons occurred into the Squamscott river from the Wastewater Treatment Plant."
}