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:Item14011, reported Oct 3, 2026, 11:38 PM EDT, retrieved 2026-11-02 11:55 UTC · notice

Unresolved: no end reported on Merrimack River: Unresolved: no end reported, until Nov 2, 2026, 10:38 PM EST unless a new report changes it.

Why this colour: Unresolved: no end reported: a discharge was reported and its end never was; shown hatched yellow until 30 days after it started. Rationale: From day 7 to day 30 the reach or water is shown hatched yellow 'unresolved: no end reported', listed under active discharges with that label. (source: rules.json unresolved) How long a water stays coloured, and why

Unresolved: no end reported on Piscataquog River: Unresolved: no end reported, until Nov 2, 2026, 10:38 PM EST unless a new report changes it.

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

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.

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: not reported
Ended: Oct 3, 2026, 11:38 AM EDT
Precision: Known to the minute
Reported to the source: Oct 3, 2026, 11:38 PM EDT
Published: Oct 3, 2026, 11:38 PM 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

Caution Merrimack River: Discharge record with no status and no reported end, Oct 3, 2026, 11:38 PM EDT to Oct 17, 2026, 11:38 PM EDT
Unresolved: no end reported Merrimack River: Unresolved: no end reported, Oct 17, 2026, 11:38 PM EDT to Nov 2, 2026, 10:38 PM EST
No current report Merrimack River: Unresolved: no end reported (off the map after 30 days), Nov 2, 2026, 10:38 PM EST to Jan 1, 2027, 10:38 PM EST
Caution Piscataquog River: Discharge record with no status and no reported end, Oct 3, 2026, 11:38 PM EDT to Oct 17, 2026, 11:38 PM EDT
Unresolved: no end reported Piscataquog River: Unresolved: no end reported, Oct 17, 2026, 11:38 PM EDT to Nov 2, 2026, 10:38 PM EST
No current report Piscataquog River: Unresolved: no end reported (off the map after 30 days), Nov 2, 2026, 10:38 PM EST to Jan 1, 2027, 10:38 PM EST

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:Item14011
Original notice: https://www.manchesternh.gov/Departments/Sewer-and-Stormwater/CSO/C…
Revision of: nh-permittees:manchester:Item14010
Revised by: no later revision

Every field of the record

All fields of event nh-permittees:manchester:Item14011
`event_id`	nh-permittees:manchester:Item14011
`source_id`	nh-permittees
`source_record_id`	manchester:Item14011
`parent_event_id`	nh-permittees:manchester:Item14010
`event_type`	cso
`status`	ended
`discharger_id`	nh-manchester-epd
`discharger_name`	City of Manchester DPW Environmental Protection Division
`npdes_permit`	NH0100447
`outfall_id`	null
`outfall_name`	null
`waterbody_text`	null
`water_slugs`	["merrimack-river-nh","piscataquog-river-nh"]
`water_match`	inferred
`lat`	null
`lon`	null
`coord_source`	null
`coord_precision_m`	null
`started_at`	null
`ended_at`	2026-10-03T11:38:00-04:00
`time_precision`	minute
`reported_at`	2026-10-03T23:38:00-04:00
`published_at`	2026-10-03T23:38:00-04:00
`source_updated_at`	null
`fetched_at`	2026-11-02T11:55:02Z
`material`	combined sewage and stormwater (CSO)
`volume_gal`	null
`volume_text`	null
`estimate_flag`	unknown
`authority`	City of Manchester EPD (CSO Discharge Notification page)
`advice_text`	null
`advice_window_hours`	null
`advice_window_basis`	null
`source_url`	https://www.manchesternh.gov/Departments/Sewer-and-Stormwater/CSO/CSO-Discharge-Notification#Item14011
`parse_error`	null
`fixture`	false
`file`	events/nh-permittees~3Amanchester~3AItem14011.json
`duplicate_of`	null
`placement_note`	null
`unplaced_reason`	null
`set_aside`	null
`superseded`	null
`reach`	null
`reach_band`	null

The source's record (raw)

{
  "item_id": "Item14011",
  "title": "City Of Manchester CSO Notification - No Activations for 12 Hours",
  "published": "Published: 10/03/2026 11:38 PM",
  "body": "Please be advised that the City of Manchester has experienced no CSO activations during the past 12 hours. For more detailed CSO discharge information please go to EPD's website at: https://www.manchesternh.gov/csomap Thank you",
  "kind": "all_clear"
}

Source: City of Manchester EPD (CSO Discharge Notification page) via nh-permittees, record manchester:Item14011, reported Oct 3, 2026, 11:38 PM EDT, retrieved 2026-11-02 11:55 UTC · notice

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