New Hampshire / Events /

Combined sewer overflow: City of Manchester DPW Environmental Protection Division

Ended (as reported) · City of Manchester EPD (CSO Discharge Notification page)

Source: City of Manchester EPD (CSO Discharge Notification page) via nh-permittees, record manchester:Item14026, reported Oct 14, 2026, 12:08 AM EDT, retrieved 2026-11-02 11:55 UTC · notice

1. The reported outfall

Outfall reported by City of Manchester DPW Environmental Protection Division (NH0100447). Location: no coordinates in the record or the outfall registry.

2. Waters named in the notice

The notice names no water. We place it on Merrimack River, NH, Piscataquog River, NH. Inferred (for example from the discharger's receiving water); the source does not name the water.

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

not reported

Ended

Oct 17, 2026, 8 PM EDT

Precision

Known to the hour

Reported to the source

Oct 14, 2026, 12:08 AM EDT

Published

Oct 14, 2026, 12:08 AM EDT

Source last updated

not given

We fetched it

2026-11-02 11:55 UTC

What and how much

Type

Combined sewer overflow

Status in the record

Ended (as reported)

Material

“combined sewage and stormwater (CSO)”

Volume

not reported (not stated whether estimated or measured)

Volume in the source's words

none

Advice

The record carries no advice text from City of Manchester EPD (CSO Discharge Notification 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 Merrimack River: Discharge in progress, Oct 14, 2026, 12:08 AM EDT to Oct 17, 2026, 8:23 PM EDT
• Advisory in effect Merrimack River: Within the authority's advice window after the discharge ended, Oct 17, 2026, 8:23 PM EDT to Oct 20, 2026, 8:23 PM EDT
• Advisory in effect Piscataquog River: Discharge in progress, Oct 14, 2026, 12:08 AM EDT to Oct 17, 2026, 8:23 PM EDT
• Advisory in effect Piscataquog River: Within the authority's advice window after the discharge ended, Oct 17, 2026, 8:23 PM EDT to Oct 20, 2026, 8:23 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

manchester:Item14026

Original notice

https://www.manchesternh.gov/Departments/Sewer-and-Stormwater/CSO/C…

Revision of

none (first record)

Revised by

no later revision

{
  "item_id": "Item14026",
  "title": "City Of Manchester CSO Notification - Activation",
  "published": "Published: 10/14/2026 12:08 AM",
  "body": "Please be advised that the City of Manchester has experienced CSO activations due to heavy rain and corresponding high flows. For more detailed CSO discharge information please go to EPD's website at: https://www.manchesternh.gov/csomap Thank you",
  "kind": "activation",
  "ended_at_basis": "'No Activations for 12 Hours' notice Item14033 published Published: 10/18/2026  8:23 AM: activations ended no later than 12 h before it"
}