Amesbury Water Pollution Abatement Plant
SSO · Massachusetts · Amesbury
- NPDES permit
- MA0101745
- Outfalls
- none with coordinates yet
- Receiving waters
- Powwow River; Back River
- Tracked waters
- Powwow River, MA
- Events tracked
- 28 discharges · latest Jan 28, 2026, 8:30 AM EST
- Volume reported
- 489,875 gallons across the 9 discharges that give a volume (19 without one)
Source: discharger record from the project's research and EPA ECHO (dischargers.json); counts from the 28 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 |
|---|---|---|---|---|---|---|---|
| Jan 28, 2026, 8:30 AM EST | Jan 28, 2026, 10:15 AM EST | “Surface only” (not placed) | not stated | Sanitary sewer overflow | 5,000 gal | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 7df2950a-edc9-4804-9c3a-6845a91b0aa8, published Jan 28, 2026, 11:50 AM EST, retrieved 2026-11-02 10:58 UTC · notice | record below |
Full record (older than 180 days, so no page of its own) | |||||||
| Jan 28, 2026, 8:30 AM EST | ended, time not reported | “Surface only” (not placed) | not stated | Sanitary sewer overflow | not reported | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record a3c11b21-cb89-4797-9366-eafe54fc8f37, published Jan 28, 2026, 11:46 AM EST, retrieved 2026-11-02 10:58 UTC · notice | record below |
Full record (older than 180 days, so no page of its own) | |||||||
| Oct 17, 2024, 1:00 PM EDT | Oct 17, 2024, 6:00 PM EDT | Powwow River, MA | not stated | Sanitary sewer overflow | 1,500 gal | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record cd6a73c9-41ee-4d20-8b7f-26fa133d4cf0, published Oct 22, 2024, 4:03 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) | |||||||
| Oct 17, 2024, 1:00 PM EDT | ended, time not reported | Powwow River, MA | not stated | Sanitary sewer overflow | not reported | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 32abc770-488f-4fe0-b387-3b288a0656c5, published Oct 17, 2024, 6:54 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) | |||||||
| Oct 17, 2024, 1:00 PM EDT | ended, time not reported | Powwow River, MA | not stated | Sanitary sewer overflowrevised | not reported | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 7632698d-c2cc-4a50-9890-06e5025c35b5, published Oct 17, 2024, 2:34 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) | |||||||
| Jan 10, 2024, 8:15 AM EST | Jan 10, 2024, 8:35 AM EST | “Back River” (not placed) | not stated | Sanitary sewer overflow | 1,000 gal | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record b562ee60-2369-4ba8-b5ea-af5fc9b7dad4, published Jan 10, 2024, 11:07 AM EST, retrieved 2026-11-02 10:58 UTC · notice | record below |
Full record (older than 180 days, so no page of its own) | |||||||
| Jan 10, 2024, 8:15 AM EST | ended, time not reported | “Back River” (not placed) | not stated | Sanitary sewer overflow | not reported | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record be665be9-f731-41b0-83ca-7afbcffcb414, published Jan 10, 2024, 10:09 AM EST, retrieved 2026-11-02 10:58 UTC · notice | record below |
Full record (older than 180 days, so no page of its own) | |||||||
| Sep 19, 2023, 2:00 AM EDT | Sep 19, 2023, 11:45 AM EDT | Powwow River, MA | not stated | Sanitary sewer overflow | 57,690 gal | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record fdb232ce-acfe-47eb-a05f-17c30c49fecd, published Dec 12, 2023, 9:12 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 19, 2023, 2:00 AM EDT | ended, time not reported | Powwow River, MA | not stated | Sanitary sewer overflow | not reported | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record ea8e0f50-5570-4d61-a6ce-cffe32688ad9, published Sep 19, 2023, 1:10 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 19, 2023, 2:00 AM EDT | ongoing (as reported) | Powwow River, MA | not stated | Sanitary sewer overflow | not reported | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 8f4aa07d-c83c-4eb2-9c79-b74c7173b8d4, published Sep 19, 2023, 9:53 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Sanitary sewer overflow, AMESBURY WATER POLLUTION ABATEMENT PLANT, Sep 19, 2023, 2:00 AM EDT · Map |
| Sep 19, 2023, 2:00 AM EDT | ended, time not reported | Powwow River, MA | not stated | Sanitary sewer overflowrevised | not reported | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 24d57c32-8a5f-4862-82d5-0bc11ac33dd8, published Sep 19, 2023, 2:28 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) | |||||||
| Aug 18, 2023, 2:30 PM EDT | ended, time not reported | “Merrimac River” (not placed) | not stated | Sanitary sewer overflow | not reported | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record e7b641a8-cf2d-43eb-b46e-6df2811cf7d4, published Aug 18, 2023, 5:34 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | record below |
Full record (older than 180 days, so no page of its own) | |||||||
| Aug 18, 2023, 2:30 PM EDT | ended, time not reported | “Merrimac River” (not placed) | not stated | Sanitary sewer overflowrevised | not reported | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 6f560925-335a-4213-999b-bbd2db7fbae4, published Aug 18, 2023, 2:42 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | record below |
Full record (older than 180 days, so no page of its own) | |||||||
| Aug 18, 2023, 2:00 PM EDT | Aug 18, 2023, 6:00 PM EDT | Powwow River, MA | not stated | Sanitary sewer overflow | 5,000 gal | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 4c637235-52cb-4bcb-8d94-9ca0179b93ec, published Dec 12, 2023, 9:07 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) | |||||||
| Aug 18, 2023, 2:00 PM EDT | ended, time not reported | Powwow River, MA | not stated | Sanitary sewer overflow | not reported | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 0e8f0cc2-716a-4e89-a48a-9cb6784bd385, published Aug 18, 2023, 6:33 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) | |||||||
| Aug 18, 2023, 2:00 PM EDT | ended, time not reported | Powwow River, MA | not stated | Sanitary sewer overflowrevised | 2,500 gal | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 59fb0a4b-3719-4468-9692-6ffe7729a411, published Aug 18, 2023, 3:25 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) | |||||||
| May 1, 2023, 3:00 AM EDT | May 1, 2023, 7:00 PM EDT | Powwow River, MA | not stated | Sanitary sewer overflow | 30,000 gal | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 43023208-0765-4395-b9e3-b94fff6f1077, published Dec 12, 2023, 8:55 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) | |||||||
| May 1, 2023, 2:15 AM EDT | ended, time not reported | Powwow River, MA | not stated | Sanitary sewer overflow | not reported | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record bbc915f0-9959-47a9-87aa-adc9913c470f, published May 1, 2023, 3:18 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) | |||||||
| May 1, 2023, 2:00 AM EDT | ended, time not reported | Powwow River, MA | not stated | Sanitary sewer overflow | not reported | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 2db82c41-fed0-4cc9-8b3f-0d6ef489e735, published May 1, 2023, 6:07 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) | |||||||
| May 1, 2023, 2:00 AM EDT | ongoing (as reported) | Powwow River, MA | not stated | Sanitary sewer overflow | not reported | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 43c7b0de-0859-4b0b-849e-f2474240b382, published May 1, 2023, 10:32 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Sanitary sewer overflow, AMESBURY WATER POLLUTION ABATEMENT PLANT, May 1, 2023, 2:00 AM EDT · Map |
| May 1, 2023, 2:00 AM EDT | ended, time not reported | Powwow River, MA | not stated | Sanitary sewer overflowrevised | not reported | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record f15c4e34-697e-4b1f-b5ab-0434e753c222, published May 1, 2023, 10:01 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 14, 2023, 8:40 AM EDT | Mar 16, 2023, 4:46 AM EDT | Powwow River, MA | not stated | Sanitary sewer overflow | 346,105 gal | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record bfcaa541-49c0-42cd-a151-6dfeab0b2b17, published Dec 12, 2023, 8:49 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) | |||||||
| Mar 14, 2023, 8:40 AM EDT | ended, time not reported | Powwow River, MA | not stated | Sanitary sewer overflow | not reported | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 8e00384b-90b3-42d7-bb5c-2cbe79c372a4, published Mar 16, 2023, 7:16 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 14, 2023, 8:40 AM EDT | ongoing (as reported) | Powwow River, MA | not stated | Sanitary sewer overflow | not reported | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record ee2c6af2-5a6c-481e-8ff8-41db0e91a5ee, published Mar 16, 2023, 12:32 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Sanitary sewer overflow, AMESBURY WATER POLLUTION ABATEMENT PLANT, Mar 14, 2023, 8:40 AM EDT · Map |
| Mar 14, 2023, 8:40 AM EDT | ongoing (as reported) | Powwow River, MA | not stated | Sanitary sewer overflow | not reported | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record f7c9a844-a3c5-40cf-9c26-5d93844e6371, published Mar 15, 2023, 4:39 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Sanitary sewer overflow, AMESBURY WATER POLLUTION ABATEMENT PLANT, Mar 14, 2023, 8:40 AM EDT · Map |
| Mar 14, 2023, 8:40 AM EDT | ongoing (as reported) | Powwow River, MA | not stated | Sanitary sewer overflow | not reported | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 4df0edaf-fd8c-4a9e-ada6-a7ef1f3968e1, published Mar 15, 2023, 8:38 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Sanitary sewer overflow, AMESBURY WATER POLLUTION ABATEMENT PLANT, Mar 14, 2023, 8:40 AM EDT · Map |
| Mar 14, 2023, 8:40 AM EDT | ongoing (as reported) | Powwow River, MA | not stated | Sanitary sewer overflow | not reported | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 53b7281c-e8a2-4512-ae79-e4aae89acf1b, published Mar 15, 2023, 12:52 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Sanitary sewer overflow, AMESBURY WATER POLLUTION ABATEMENT PLANT, Mar 14, 2023, 8:40 AM EDT · Map |
| Mar 14, 2023, 8:40 AM EDT | ongoing (as reported) | Powwow River, MA | not stated | Sanitary sewer overflow | not reported | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record a0f16c8f-c694-4ffa-bddf-aaa6cf83d86b, published Mar 14, 2023, 4:55 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Sanitary sewer overflow, AMESBURY WATER POLLUTION ABATEMENT PLANT, Mar 14, 2023, 8:40 AM EDT · Map |
| Mar 14, 2023, 8:40 AM EDT | ended, time not reported | Powwow River, MA | not stated | Sanitary sewer overflowrevised | not reported | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record ac257ecc-1c4c-44c5-8b13-22e675cd5804, published Mar 14, 2023, 9:04 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 1, 2023, 12:50 PM EST | Feb 1, 2023, 1:20 PM EST | “Ground” (not placed) | not stated | Sanitary sewer overflow | 200 gal | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 2f38f1b2-4363-4dc5-87ee-ad849e9af18e, published Dec 12, 2023, 8:32 AM EST, retrieved 2026-11-02 10:58 UTC · notice | record below |
Full record (older than 180 days, so no page of its own) | |||||||
| Feb 1, 2023, 12:50 PM EST | ended, time not reported | “Surface only” (not placed) | not stated | Sanitary sewer overflow | not reported | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record e7b1e882-9c1e-44ac-8cdf-0516ed6acca1, published Feb 1, 2023, 2:18 PM EST, retrieved 2026-11-02 10:58 UTC · notice | record below |
Full record (older than 180 days, so no page of its own) | |||||||
| Jan 26, 2023, 10:30 PM EST | ended, time not reported | Powwow River, MA | not stated | Sanitary sewer overflow | not reported | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 6974d9f3-e7ad-4414-bd68-91798d5dfaf3, published Jan 26, 2023, 11:01 PM EST, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Jan 26, 2023, 4:00 PM EST | ended, time not reported | Powwow River, MA | not stated | Sanitary sewer overflowrevised | not reported | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record b8ea2a80-633c-45bf-acb3-0525dccc6ccc, published Jan 26, 2023, 4:12 PM EST, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Jan 26, 2023, 7:30 AM EST | Jan 26, 2023, 10:30 PM EST | Powwow River, MA | not stated | Sanitary sewer overflow | 43,380 gal | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record b15910c6-d538-4084-a1db-470fd3d6f283, published Dec 12, 2023, 8:16 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) | |||||||
| Jan 26, 2023, 7:30 AM EST | ongoing (as reported) | Powwow River, MA | not stated | Sanitary sewer overflow | not reported | AMESBURY WATER POLLUTION ABATEMENT PLANT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record ade83081-719a-4f27-bc5f-197c1896ad6f, published Jan 26, 2023, 9:05 AM EST, retrieved 2026-11-02 10:58 UTC · notice | Event: Sanitary sewer overflow, AMESBURY WATER POLLUTION ABATEMENT PLANT, Jan 26, 2023, 7:30 AM EST · Map |
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 months50Dec 2025 to Nov 2026; on this discharger's reports
- 2026 season under advisory0.0%May to October; 0 h
Discharge events per month
9 events, Jan 2022 to Nov 2026. Counted from 9 verified or annual reports.
- 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 | 1 | 0 | 1 | Verified or annual reports | |
| Feb 2023 | 0 | 1 | 0 | 1 | Verified or annual reports | |
| Mar 2023 | 0 | 1 | 0 | 1 | Verified or annual reports | |
| Apr 2023 | 0 | 0 | 0 | 0 | ||
| May 2023 | 0 | 1 | 0 | 1 | Verified or annual reports | |
| Jun 2023 | 0 | 0 | 0 | 0 | ||
| Jul 2023 | 0 | 0 | 0 | 0 | ||
| Aug 2023 | 0 | 1 | 0 | 1 | Verified or annual reports | |
| 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 | 0 | 0 | 0 | ||
| Jan 2024 | 0 | 1 | 0 | 1 | Verified or annual reports | |
| Feb 2024 | 0 | 0 | 0 | 0 | ||
| Mar 2024 | 0 | 0 | 0 | 0 | ||
| 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 | 1 | 0 | 1 | Verified or annual reports | |
| 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 | 1 | 0 | 1 | Verified or annual reports | |
| Feb 2026 | 0 | 0 | 0 | 0 | ||
| Mar 2026 | 0 | 0 | 0 | 0 | ||
| Apr 2026 | 0 | 0 | 0 | 0 | ||
| May 2026 | 0 | 0 | 0 | 0 | ||
| 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. 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 | 63 | 63 | 744 | |
| Feb 2023 | 49 | 49 | 672 | |
| Mar 2023 | 92 | 92 | 744 | |
| Apr 2023 | 0 | 0 | 720 | |
| May 2023 | 64 | 64 | 744 | |
| Jun 2023 | 0 | 0 | 720 | |
| Jul 2023 | 0 | 0 | 744 | |
| Aug 2023 | 52 | 52 | 744 | |
| Sep 2023 | 58 | 58 | 720 | |
| Oct 2023 | 0 | 0 | 744 | |
| Nov 2023 | 0 | 0 | 720 | |
| Dec 2023 | 0 | 0 | 744 | |
| Jan 2024 | 48 | 48 | 744 | |
| Feb 2024 | 0 | 0 | 696 | |
| Mar 2024 | 0 | 0 | 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 | 53 | 53 | 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 | 50 | 50 | 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 | 1 | |
| Feb 2023 | 1 | |
| Mar 2023 | 3 | |
| Apr 2023 | 0 | |
| May 2023 | 1 | |
| Jun 2023 | 0 | |
| Jul 2023 | 0 | |
| Aug 2023 | 1 | |
| Sep 2023 | 1 | |
| Oct 2023 | 0 | |
| Nov 2023 | 0 | |
| Dec 2023 | 0 | |
| Jan 2024 | 1 | |
| Feb 2024 | 0 | |
| Mar 2024 | 0 | |
| Apr 2024 | 0 | |
| May 2024 | 0 | |
| Jun 2024 | 0 | |
| Jul 2024 | 0 | |
| Aug 2024 | 0 | |
| Sep 2024 | 0 | |
| Oct 2024 | 1 | |
| 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 | 1 | |
| Feb 2026 | 0 | |
| Mar 2026 | 0 | |
| Apr 2026 | 0 | |
| May 2026 | 0 | |
| 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 9 events that gave a number.
- Partly covered or sparse source
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 | 482,375 | 6 | 0 | |
| 2024 | 2,500 | 2 | 0 | |
| 2025 | 0 | 0 | 0 | |
| 2026 | 5,000 | 1 | 0 |
Hours under advisory per year
Hours under advisory each year; 2026 to date.
- Advisory in effect
- Partly covered or sparse source
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 | 377 | 4.3% | |
| 2024 | 101 | 1.2% | |
| 2025 | 0 | 0.0% | |
| 2026 | 50 | 0.7% |
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 | 3 | 4 |
| Feb | 1 | 4 |
| Mar | 1 | 4 |
| Apr | 0 | 4 |
| May | 1 | 4 |
| Jun | 0 | 5 |
| Jul | 0 | 5 |
| Aug | 1 | 5 |
| Sep | 1 | 5 |
| Oct | 1 | 5 |
| Nov | 0 | 5 |
| Dec | 0 | 4 |
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