Greenfield Water Pollution Control Facility
SSO · Massachusetts · Greenfield
- NPDES permit
- MA0101214
- Outfalls
- none with coordinates yet
- Receiving waters
- Green River; Deerfield River
- Tracked waters
- Deerfield River, MA
- Events tracked
- 14 discharges · latest May 17, 2026, 3:00 PM EDT
- Volume reported
- 3,416,532 gallons across the 9 discharges that give a volume (5 without one)
Source: discharger record from the project's research and EPA ECHO (dischargers.json); counts from the 14 event records below, as of 2026-11-02 11:56 UTC.
How it tells the public
Not verified; per 314 CMR 16.06(3) each non-CSO system files an SSO Public Notification Plan and must post advisories on its website and email/text subscribers for reportable events. Events appear in the MassDEP portal as permiteeClass 'Non-CSO'.
Source: the project's research on each operator's notification channel (research/<state>/dischargers.json), checked by fetching the operator's pages.
Outfalls
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.
Event history
| Start | End | Water | Outfall | Type | Volume | Source | Links |
|---|---|---|---|---|---|---|---|
| May 17, 2026, 3:00 PM EDT | ended, time not reported | “Green River” (not placed) | not stated | Sanitary sewer overflow | not reported | GREENFIELD WATER POLLUTION CONTROL FACILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 6ffe919c-85b9-44eb-8427-9c82c4372311, published May 18, 2026, 8:14 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Sanitary sewer overflow, GREENFIELD WATER POLLUTION CONTROL FACILITY, May 17, 2026, 3:00 PM EDT |
| Mar 23, 2024, 7:35 PM EDT | ended, time not reported | “Green River” (not placed) | not stated | Sanitary sewer overflow | 20,881 gal | GREENFIELD WATER POLLUTION CONTROL FACILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 2d574b3a-c3d3-4915-bf8f-732bb0fcc42c, published Mar 25, 2024, 11:51 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Mar 23, 2024, 7:30 PM EDT | Mar 23, 2024, 9:30 PM EDT | “Green RIver” (not placed) | not stated | Sanitary sewer overflow | 20,881 gal | GREENFIELD WATER POLLUTION CONTROL FACILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record f52410ce-105c-4058-aecc-8e220409a12b, published Mar 25, 2024, 11:56 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Feb 17, 2024, 5:30 AM EST | ended, time not reported | Deerfield River, MA | 001 | Bypass | 660,000 gal | GREENFIELD WATER POLLUTION CONTROL FACILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 8de5dbc4-cffe-4ebd-bb68-4b2b0827dcab, published Feb 17, 2024, 8:47 AM EST, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Dec 18, 2023, 10:30 AM EST | ended, time not reported | “Green River” (not placed) | not stated | Sanitary sewer overflow | 497,330 gal | GREENFIELD WATER POLLUTION CONTROL FACILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 51d8d02b-d174-499e-886c-39315302aa4a, published Dec 21, 2023, 10:45 AM EST, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Dec 17, 2023, 10:30 AM EST | Dec 17, 2023, 8:15 PM EST | “Green River” (not placed) | not stated | Sanitary sewer overflow | 497,330 gal | GREENFIELD WATER POLLUTION CONTROL FACILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 93553e93-8b3d-4fc7-9c49-6fcc517570d8, published Dec 21, 2023, 10:48 AM EST, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Sep 8, 2023, 7:40 PM EDT | Sep 8, 2023, 9:25 PM EDT | “Green RIver” (not placed) | not stated | Sanitary sewer overflow | 66,240 gal | GREENFIELD WATER POLLUTION CONTROL FACILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record f1b37911-c108-4ce2-87cd-045cb4792c57, published Sep 18, 2023, 1:06 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Sep 8, 2023, 7:40 PM EDT | ended, time not reported | “Green RIver” (not placed) | not stated | Sanitary sewer overflow | not reported | GREENFIELD WATER POLLUTION CONTROL FACILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 5c1347f9-9272-4622-9eee-b43938260810, published Sep 11, 2023, 2:18 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Jul 21, 2023, 4:23 PM EDT | ended, time not reported | “Green RIver” (not placed) | not stated | Sanitary sewer overflow | not reported | GREENFIELD WATER POLLUTION CONTROL FACILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record f4bebd72-ca4b-4d42-b314-058532f1a631, published Aug 3, 2023, 7:32 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Jul 21, 2023, 4:07 PM EDT | Jul 22, 2023, 11:49 AM EDT | “Green RIver” (not placed) | not stated | Sanitary sewer overflow | 1.41 million gal | GREENFIELD WATER POLLUTION CONTROL FACILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 7c0f3a44-1e80-4de5-9f03-5a14d8811f7d, published Aug 8, 2023, 2:09 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | record below |
Full record (older than 180 days, so no page of its own) | |||||||
| Jul 16, 2023, 11:30 AM EDT | Jul 16, 2023, 3:45 PM EDT | “Green RIver” (not placed) | not stated | Sanitary sewer overflow | 90,000 gal | GREENFIELD WATER POLLUTION CONTROL FACILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record a6a64846-f3f8-4f5a-9563-8cf6370a1ca1, published Aug 8, 2023, 11:43 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | record below |
Full record (older than 180 days, so no page of its own) | |||||||
| Jul 16, 2023, 11:30 AM EDT | ended, time not reported | “Green RIver” (not placed) | not stated | Sanitary sewer overflow | not reported | GREENFIELD WATER POLLUTION CONTROL FACILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 9ad9601b-eaee-4c89-af12-b2115bea8c4f, published Jul 17, 2023, 1:03 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Jul 10, 2023, 12:00 PM EDT | ended, time not reported | “Green RIver” (not placed) | not stated | Sanitary sewer overflow | not reported | GREENFIELD WATER POLLUTION CONTROL FACILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 9c323be6-625a-4b29-8dd6-b16e82218ffe, published Jul 11, 2023, 8:14 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Jul 10, 2023, 11:48 AM EDT | Jul 10, 2023, 5:28 PM EDT | “Green RIver” (not placed) | not stated | Sanitary sewer overflow | 156,060 gal | GREENFIELD WATER POLLUTION CONTROL FACILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 66a4ce03-e329-4844-8afa-0e7fb69dd75a, published Aug 8, 2023, 2:05 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | record below |
Full record (older than 180 days, so no page of its own) | |||||||
History
- Discharge events, last 12 months1Dec 2025 to Nov 2026
- Days with a discharge, last 12 months1Dec 2025 to Nov 2026
- Hours under advisory, last 12 months0Dec 2025 to Nov 2026; on this discharger's reports
- 2026 season under advisory0.0%May to October; 0 h
Discharge events per month
8 events, Jan 2022 to Nov 2026. Counted from 6 verified or annual reports, 2 public notices.
- Combined sewer overflow
- Sanitary sewer overflow
- Bypass, blended or other
- No source
- Partly covered or sparse source
No source covers 2022-01 to 2022-05. MassDEP portal records begin 2022-06-30. Verified Data Reports arrive after the month ends, so the latest months count public notices.
Source: MassDEP sewage notification portal. Covered 2022-06-30 to 2026-11-02.
Show table
| Month | Combined sewer overflow | Sanitary sewer overflow | Bypass, blended or other | Total | Counted from | Coverage |
|---|---|---|---|---|---|---|
| Jan 2022 | 0 | 0 | 0 | 0 | No source | |
| Feb 2022 | 0 | 0 | 0 | 0 | No source | |
| Mar 2022 | 0 | 0 | 0 | 0 | No source | |
| Apr 2022 | 0 | 0 | 0 | 0 | No source | |
| May 2022 | 0 | 0 | 0 | 0 | No source | |
| Jun 2022 | 0 | 0 | 0 | 0 | Partly covered or sparse source | |
| Jul 2022 | 0 | 0 | 0 | 0 | ||
| Aug 2022 | 0 | 0 | 0 | 0 | ||
| Sep 2022 | 0 | 0 | 0 | 0 | ||
| Oct 2022 | 0 | 0 | 0 | 0 | ||
| Nov 2022 | 0 | 0 | 0 | 0 | ||
| Dec 2022 | 0 | 0 | 0 | 0 | ||
| Jan 2023 | 0 | 0 | 0 | 0 | ||
| Feb 2023 | 0 | 0 | 0 | 0 | ||
| Mar 2023 | 0 | 0 | 0 | 0 | ||
| Apr 2023 | 0 | 0 | 0 | 0 | ||
| May 2023 | 0 | 0 | 0 | 0 | ||
| Jun 2023 | 0 | 0 | 0 | 0 | ||
| Jul 2023 | 0 | 3 | 0 | 3 | Verified or annual reports | |
| Aug 2023 | 0 | 0 | 0 | 0 | ||
| Sep 2023 | 0 | 1 | 0 | 1 | Verified or annual reports | |
| Oct 2023 | 0 | 0 | 0 | 0 | ||
| Nov 2023 | 0 | 0 | 0 | 0 | ||
| Dec 2023 | 0 | 1 | 0 | 1 | Verified or annual reports | |
| Jan 2024 | 0 | 0 | 0 | 0 | ||
| Feb 2024 | 0 | 0 | 1 | 1 | Public notices (no report yet) | |
| Mar 2024 | 0 | 1 | 0 | 1 | Verified or annual reports | |
| Apr 2024 | 0 | 0 | 0 | 0 | ||
| May 2024 | 0 | 0 | 0 | 0 | ||
| Jun 2024 | 0 | 0 | 0 | 0 | ||
| Jul 2024 | 0 | 0 | 0 | 0 | ||
| Aug 2024 | 0 | 0 | 0 | 0 | ||
| Sep 2024 | 0 | 0 | 0 | 0 | ||
| Oct 2024 | 0 | 0 | 0 | 0 | ||
| Nov 2024 | 0 | 0 | 0 | 0 | ||
| Dec 2024 | 0 | 0 | 0 | 0 | ||
| Jan 2025 | 0 | 0 | 0 | 0 | ||
| Feb 2025 | 0 | 0 | 0 | 0 | ||
| Mar 2025 | 0 | 0 | 0 | 0 | ||
| Apr 2025 | 0 | 0 | 0 | 0 | ||
| May 2025 | 0 | 0 | 0 | 0 | ||
| Jun 2025 | 0 | 0 | 0 | 0 | ||
| Jul 2025 | 0 | 0 | 0 | 0 | ||
| Aug 2025 | 0 | 0 | 0 | 0 | ||
| Sep 2025 | 0 | 0 | 0 | 0 | ||
| Oct 2025 | 0 | 0 | 0 | 0 | ||
| Nov 2025 | 0 | 0 | 0 | 0 | ||
| Dec 2025 | 0 | 0 | 0 | 0 | ||
| Jan 2026 | 0 | 0 | 0 | 0 | ||
| Feb 2026 | 0 | 0 | 0 | 0 | ||
| Mar 2026 | 0 | 0 | 0 | 0 | ||
| Apr 2026 | 0 | 0 | 0 | 0 | ||
| May 2026 | 0 | 1 | 0 | 1 | Public notices (no report yet) | |
| Jun 2026 | 0 | 0 | 0 | 0 | ||
| Jul 2026 | 0 | 0 | 0 | 0 | ||
| Aug 2026 | 0 | 0 | 0 | 0 | ||
| Sep 2026 | 0 | 0 | 0 | 0 | ||
| Oct 2026 | 0 | 0 | 0 | 0 | ||
| Nov 2026 | 0 | 0 | 0 | 0 |
Hours under advisory per month
Hours this discharger's reports put a water under an advisory, by the map's red rules.
- Advisory in effect
- No source
- Partly covered or sparse source
No source covers 2022-01 to 2022-05. 2 discharge events have no reported end and no ongoing status; under the status rules they set caution, not an advisory, and add no hours here. Official beach and cyanobacteria advisories are counted on water pages only. MassDEP portal records begin 2022-06-30. Verified Data Reports arrive after the month ends, so the latest months count public notices.
Source: MassDEP sewage notification portal. Covered 2022-06-30 to 2026-11-02.
Show table
| Month | Hours under advisory | From discharge windows | Hours in month | Coverage |
|---|---|---|---|---|
| Jan 2022 | 0 | 0 | 744 | No source |
| Feb 2022 | 0 | 0 | 672 | No source |
| Mar 2022 | 0 | 0 | 744 | No source |
| Apr 2022 | 0 | 0 | 720 | No source |
| May 2022 | 0 | 0 | 744 | No source |
| Jun 2022 | 0 | 0 | 720 | Partly covered or sparse source |
| Jul 2022 | 0 | 0 | 744 | |
| Aug 2022 | 0 | 0 | 744 | |
| Sep 2022 | 0 | 0 | 720 | |
| Oct 2022 | 0 | 0 | 744 | |
| Nov 2022 | 0 | 0 | 720 | |
| Dec 2022 | 0 | 0 | 744 | |
| Jan 2023 | 0 | 0 | 744 | |
| Feb 2023 | 0 | 0 | 672 | |
| Mar 2023 | 0 | 0 | 744 | |
| Apr 2023 | 0 | 0 | 720 | |
| May 2023 | 0 | 0 | 744 | |
| Jun 2023 | 0 | 0 | 720 | |
| Jul 2023 | 174 | 174 | 744 | |
| Aug 2023 | 0 | 0 | 744 | |
| Sep 2023 | 50 | 50 | 720 | |
| Oct 2023 | 0 | 0 | 744 | |
| Nov 2023 | 0 | 0 | 720 | |
| Dec 2023 | 58 | 58 | 744 | |
| Jan 2024 | 0 | 0 | 744 | |
| Feb 2024 | 0 | 0 | 696 | |
| Mar 2024 | 50 | 50 | 744 | |
| Apr 2024 | 0 | 0 | 720 | |
| May 2024 | 0 | 0 | 744 | |
| Jun 2024 | 0 | 0 | 720 | |
| Jul 2024 | 0 | 0 | 744 | |
| Aug 2024 | 0 | 0 | 744 | |
| Sep 2024 | 0 | 0 | 720 | |
| Oct 2024 | 0 | 0 | 744 | |
| Nov 2024 | 0 | 0 | 720 | |
| Dec 2024 | 0 | 0 | 744 | |
| Jan 2025 | 0 | 0 | 744 | |
| Feb 2025 | 0 | 0 | 672 | |
| Mar 2025 | 0 | 0 | 744 | |
| Apr 2025 | 0 | 0 | 720 | |
| May 2025 | 0 | 0 | 744 | |
| Jun 2025 | 0 | 0 | 720 | |
| Jul 2025 | 0 | 0 | 744 | |
| Aug 2025 | 0 | 0 | 744 | |
| Sep 2025 | 0 | 0 | 720 | |
| Oct 2025 | 0 | 0 | 744 | |
| Nov 2025 | 0 | 0 | 720 | |
| Dec 2025 | 0 | 0 | 744 | |
| Jan 2026 | 0 | 0 | 744 | |
| Feb 2026 | 0 | 0 | 672 | |
| Mar 2026 | 0 | 0 | 744 | |
| Apr 2026 | 0 | 0 | 720 | |
| May 2026 | 0 | 0 | 744 | |
| Jun 2026 | 0 | 0 | 720 | |
| Jul 2026 | 0 | 0 | 744 | |
| Aug 2026 | 0 | 0 | 744 | |
| Sep 2026 | 0 | 0 | 720 | |
| Oct 2026 | 0 | 0 | 744 | |
| Nov 2026 | 0 | 0 | 32 |
Days with a discharge per month
A day counts when any counted discharge was under way on it (start to reported end, local time); an event with no end counts its start day.
- No source
- Partly covered or sparse source
No source covers 2022-01 to 2022-05.
Source: MassDEP sewage notification portal. Covered 2022-06-30 to 2026-11-02.
Show table
| Month | Days with a discharge | Coverage |
|---|---|---|
| Jan 2022 | 0 | No source |
| Feb 2022 | 0 | No source |
| Mar 2022 | 0 | No source |
| Apr 2022 | 0 | No source |
| May 2022 | 0 | No source |
| Jun 2022 | 0 | Partly covered or sparse source |
| Jul 2022 | 0 | |
| Aug 2022 | 0 | |
| Sep 2022 | 0 | |
| Oct 2022 | 0 | |
| Nov 2022 | 0 | |
| Dec 2022 | 0 | |
| Jan 2023 | 0 | |
| Feb 2023 | 0 | |
| Mar 2023 | 0 | |
| Apr 2023 | 0 | |
| May 2023 | 0 | |
| Jun 2023 | 0 | |
| Jul 2023 | 4 | |
| Aug 2023 | 0 | |
| Sep 2023 | 1 | |
| Oct 2023 | 0 | |
| Nov 2023 | 0 | |
| Dec 2023 | 1 | |
| Jan 2024 | 0 | |
| Feb 2024 | 1 | |
| Mar 2024 | 1 | |
| Apr 2024 | 0 | |
| May 2024 | 0 | |
| Jun 2024 | 0 | |
| Jul 2024 | 0 | |
| Aug 2024 | 0 | |
| Sep 2024 | 0 | |
| Oct 2024 | 0 | |
| Nov 2024 | 0 | |
| Dec 2024 | 0 | |
| Jan 2025 | 0 | |
| Feb 2025 | 0 | |
| Mar 2025 | 0 | |
| Apr 2025 | 0 | |
| May 2025 | 0 | |
| Jun 2025 | 0 | |
| Jul 2025 | 0 | |
| Aug 2025 | 0 | |
| Sep 2025 | 0 | |
| Oct 2025 | 0 | |
| Nov 2025 | 0 | |
| Dec 2025 | 0 | |
| Jan 2026 | 0 | |
| Feb 2026 | 0 | |
| Mar 2026 | 0 | |
| Apr 2026 | 0 | |
| May 2026 | 1 | |
| Jun 2026 | 0 | |
| Jul 2026 | 0 | |
| Aug 2026 | 0 | |
| Sep 2026 | 0 | |
| Oct 2026 | 0 | |
| Nov 2026 | 0 |
Reported volume per year
Gallons, summed from the 7 events that gave a number (1 did not).
- Partly covered or sparse source
1 of 8 events gave no volume as a number; only numbers are summed.
Source: MassDEP sewage notification portal. Covered 2022-06-30 to 2026-11-02.
Show table
| Year | Gallons | Events with a number | Events without | Coverage |
|---|---|---|---|---|
| 2022 | 0 | 0 | 0 | Partly covered or sparse source |
| 2023 | 2,217,440 | 5 | 0 | |
| 2024 | 680,881 | 2 | 0 | |
| 2025 | 0 | 0 | 0 | |
| 2026 | 0 | 0 | 1 |
Hours under advisory per year
Hours under advisory each year; 2026 to date.
- Advisory in effect
- Partly covered or sparse source
2 discharge events have no reported end and no ongoing status; under the status rules they set caution, not an advisory, and add no hours here. Official beach and cyanobacteria advisories are counted on water pages only.
Source: MassDEP sewage notification portal. Covered 2022-06-30 to 2026-11-02.
Show table
| Year | Hours under advisory | Share of the year | Coverage |
|---|---|---|---|
| 2022 | 0 | 0.0% | Partly covered or sparse source |
| 2023 | 281 | 3.2% | |
| 2024 | 50 | 0.6% | |
| 2025 | 0 | 0.0% | |
| 2026 | 0 | 0.0% |
Discharge events by calendar month, all years
Every counted discharge event, by the calendar month it began.
Months are summed over every year a source covers; the table gives the number of years behind each month.
Source: MassDEP sewage notification portal. Covered 2022-06-30 to 2026-11-02.
Show table
| Month | Events | Years of records |
|---|---|---|
| Jan | 0 | 4 |
| Feb | 1 | 4 |
| Mar | 1 | 4 |
| Apr | 0 | 4 |
| May | 1 | 4 |
| Jun | 0 | 5 |
| Jul | 3 | 5 |
| Aug | 0 | 5 |
| Sep | 1 | 5 |
| Oct | 0 | 5 |
| Nov | 0 | 5 |
| Dec | 1 | 4 |
Discharge events by outfall
The 1 outfalls with the most events of 1, all years.
MassDEP portal records begin 2022-06-30. Verified Data Reports arrive after the month ends, so the latest months count public notices.
Source: MassDEP sewage notification portal. Covered 2022-06-30 to 2026-11-02.
Show table
| Outfall | Events |
|---|---|
| 001 | 1 |
| Outfall not stated | 7 |
How these charts are counted
Discharge events are counted once: where a source publishes both public notices and verified reports (MassDEP, Vermont DEC), a discharger's month with any verified report counts its verified reports only, and other months count notices. Revisions are folded into the record they revise, and EPA copies of a state report are not counted twice. Monthly and yearly totals (Maine DEP, EPA discharge monitoring reports, Portsmouth) are shown on their own and never added to the event counts. Hours under advisory follow the map's red rules. A muted band marks periods no source covers: a gap there is missing data, not a quiet month.
- MassDEP sewage notification portal: 2022-06-30 to now