Boston Water and Sewer Commission
CSO · Massachusetts · Boston
- NPDES permit
- MA0101192
- Outfalls
- 29 with coordinates in the registry (the state's layer lists 27)
- Receiving waters
- BOSTON INNER HARBOR; CHELSEA RIVER; DORCHESTER BAY; FORT POINT CHANNEL; LITTLE MYSTIC CHANNEL; MUDDY RIVER; MYSTIC RIVER; RESERVED CHANNEL
- Tracked waters
- Dorchester Bay, MA, Mystic River, MA, Fort Pond, MA
- Events tracked
- 350 discharges · latest Oct 11, 2026, 10:50 PM EDT
- Volume reported
- 267,944,736 gallons across the 327 discharges that give a volume (23 without one)
Source: discharger record from the project's research and EPA ECHO (dischargers.json); counts from the 350 event records below, as of 2026-11-02 11:56 UTC.
How it tells the public
BWSC CSO notification sign-up form https://www.bwsc.org/form/sign-up-for-cso-notifications-fo (choose 'Request CSO Notification'); final CSO Public Notification Plan https://www.bwsc.org/sites/default/files/2023-01/BWSC%20CSO%20Final%20PubNotPlan_0.pdf; Aquasight/ADS live map lists a Boston community; Boston Public Health Commission posts 'Combined Sewer Overflow Health Alerts'. MassDEP portal: 601 rows, latest 2026-10-11.
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.
29 outfalls in the registry
- 003 SW CORNER OF LOGAN NW OF 90 · CSO · not on a tracked water
- 004 TOMAHAWK ST · CSO · Outlet Saugus River-Frontal Broad Sound · not on a tracked water
- 005 CORNER OF SUMMER & JOHN E PFEIFER ST · CSO · Outlet Saugus River-Frontal Broad Sound · not on a tracked water
- 009 CORNER OF SUMMER & NEW ST · CSO · Outlet Saugus River-Frontal Broad Sound
- 010 WEST OF BORDER ST ON EAST BANK BOS INNER HRBR · CSO · Outlet Saugus River-Frontal Broad Sound
- 012 @310 BORDER ST · CSO
- 013 JUST NORTH OF NAY ST ON MCARDLE BRIDGE · CSO · not on a tracked water
- 014 ON LINE BETWN 338 AND S70 E EAGLE ST · CSO · Outlet Saugus River-Frontal Broad Sound · not on a tracked water
- 017 BETWN SPRINGFIELD COLLEGE 465 MEDFORD RD · CSO · Mystic River
- 019 JUST NW OF TOBIN BRIDGE AND 16TH ST · CSO · not on a tracked water
- 046 @PUMP STNS NE OF MFA · CSO · Charles River · not on a tracked water
- 057 EASTERN AVE · CSO · not on a tracked water
- 060 NE CORNER OF NE AQUARIUM PIER · CSO · not on a tracked water
- 062 SEAPORT BLVD JUST BEFORE INT W/93 · CSO · Charles River-Frontal Boston Harbor · not on a tracked water
- 064 INT DORCHESTER AVE & SUMMER ST · CSO · Charles River-Frontal Boston Harbor · not on a tracked water
- 065 WEST BANK OF FORT POINT CHANNEL · CSO · Charles River-Frontal Boston Harbor · not on a tracked water
- 068 FORT POINT CHANNEL WEST BANK INT 90 AND 93 · CSO · not on a tracked water
- 070 CORNER OF W 4TH ST AND FRONTAGE RD · TCS · Charles River-Frontal Boston Harbor · not on a tracked water
- 073 JUST NORTH OF PIKE ON EAST BANK OF FORT POINT CHANNEL · CSO · not on a tracked water
- 076 OFF PAPPAS WAY · CSO · Charles River-Frontal Boston Harbor · not on a tracked water
- 078 170 FT NORTH OF INTER E 1ST ST & I ST · CSO · Charles River-Frontal Boston Harbor · not on a tracked water
- 079 800 FT NORTH OF INTER POWER HOUSE ST & SUMMER ST · CSO · not on a tracked water
- 080 NW CORNER OF MASSPORT CONWAY FACILITY OFF DAY BLVD · CSO · not on a tracked water
- 081 INTER OF DAY BLVD & FARRAGUT RD · CSO · not on a tracked water
- 082 OFF DAY BLVD · CSO
- 084 OFF DAY BLVD · CSO · not on a tracked water
- 085 OFF DAY BLVD · CSO · not on a tracked water
- 086 OFF DAY BLVD · CSO · not on a tracked water
- 215 CSO MWR215 Union Park Pumping Station - BOS070 · TCS · Fort Point Channel
Source: EPA ECHO CSO outfall inventory matched to waters (data/outfalls-ne.json).
Event history
| Start | End | Water | Outfall | Type | Volume | Source | Links |
|---|---|---|---|---|---|---|---|
| Oct 11, 2026, 10:50 PM EDT | ended, time not reported | “FORT POINT CHANNEL” (not placed) | BOS070 CORNER OF W 4TH ST AND FRONTAGE RD | Combined sewer overflow | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record bc71cdf8-ebf2-4427-bafe-58cbcb6329ab, published Oct 13, 2026, 8:22 AM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Oct 11, 2026, 10:50 PM EDT · Map |
| Sep 28, 2026, 3:45 PM EDT | Sep 28, 2026, 4:05 PM EDT | “LITTLE MYSTIC CHANNEL” (not placed) | BOS019 JUST NW OF TOBIN BRIDGE AND 16TH ST | Combined sewer overflow | 13,380 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 0de1b2bf-5c54-42c3-8f82-56c6a97741ca, published Oct 14, 2026, 12:24 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Sep 28, 2026, 3:45 PM EDT · Map |
| Sep 28, 2026, 3:45 PM EDT | Sep 28, 2026, 4:05 PM EDT | “LITTLE MYSTIC CHANNEL” (not placed) | BOS019 JUST NW OF TOBIN BRIDGE AND 16TH ST | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 1023ccc5-faa5-4a5c-b3ca-9bc94e66fc7a, published Oct 14, 2026, 11:59 AM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Sep 28, 2026, 3:45 PM EDT · Map |
| Sep 27, 2026, 2:35 PM EDT | Sep 27, 2026, 4:05 PM EDT | “LITTLE MYSTIC CHANNEL” (not placed) | BOS019 JUST NW OF TOBIN BRIDGE AND 16TH ST | Combined sewer overflow | 374,633 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 2d127e90-9295-4b15-bfe1-2859bb638696, published Oct 14, 2026, 12:22 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Sep 27, 2026, 2:35 PM EDT · Map |
| Sep 27, 2026, 2:35 PM EDT | Sep 27, 2026, 4:05 PM EDT | “LITTLE MYSTIC CHANNEL” (not placed) | BOS019 JUST NW OF TOBIN BRIDGE AND 16TH ST | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record fe7415ea-bc1a-4e57-8df7-fd5817f8485b, published Oct 13, 2026, 10:41 AM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Sep 27, 2026, 2:35 PM EDT · Map |
| Sep 27, 2026, 10:25 AM EDT | Sep 27, 2026, 1:00 PM EDT | Mystic River, MA | BOS009 CORNER OF SUMMER & NEW ST | Combined sewer overflow | 34,722 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 6d2b964a-77f5-4132-b44d-2f716871bbf0, published Oct 14, 2026, 12:33 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Sep 27, 2026, 10:25 AM EDT · Map |
| Sep 27, 2026, 10:25 AM EDT | Sep 27, 2026, 1:00 PM EDT | Mystic River, MA | BOS009 CORNER OF SUMMER & NEW ST | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 1505c666-61e1-4dfc-839f-cefefbb292a4, published Sep 27, 2026, 11:04 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Sep 27, 2026, 10:25 AM EDT · Map |
| Sep 27, 2026, 9:05 AM EDT | Sep 27, 2026, 3:30 PM EDT | “FORT POINT CHANNEL” (not placed) | BOS070 CORNER OF W 4TH ST AND FRONTAGE RD | Combined sewer overflow | 6.36 million gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 4e163653-e653-47b5-ace8-70d8c2fe6f8f, published Oct 14, 2026, 12:37 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Sep 27, 2026, 9:05 AM EDT · Map |
| Sep 27, 2026, 9:05 AM EDT | Sep 27, 2026, 3:30 PM EDT | “FORT POINT CHANNEL” (not placed) | BOS070 CORNER OF W 4TH ST AND FRONTAGE RD | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record be03bcfa-8e63-43f7-b47e-399834d02547, published Sep 27, 2026, 10:21 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Sep 27, 2026, 9:05 AM EDT · Map |
| Sep 26, 2026, 11:50 PM EDT | Sep 27, 2026, 2:10 PM EDT | “FORT POINT CHANNEL” (not placed) | BOS065 WEST BANK OF FORT POINT CHANNEL | Combined sewer overflow | 30.36 million gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 5c993525-e468-460a-9460-04ecebb26c3a, published Oct 14, 2026, 12:13 PM EDT, retrieved 2026-11-02 11:54 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Sep 26, 2026, 11:50 PM EDT · Map |
| Sep 26, 2026, 11:50 PM EDT | Sep 27, 2026, 2:10 PM EDT | “FORT POINT CHANNEL” (not placed) | BOS065 WEST BANK OF FORT POINT CHANNEL | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record f4141ff5-0741-47a5-b219-a049f8d9743b, published Sep 27, 2026, 10:44 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Sep 26, 2026, 11:50 PM EDT · Map |
| Jul 29, 2026, 11:45 PM EDT | Jul 30, 2026, 12:40 AM EDT | Mystic River, MA | BOS009 CORNER OF SUMMER & NEW ST | Combined sewer overflow | 41,666 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 4de6e9b9-9be4-4981-b937-85eb70547ece, published Aug 12, 2026, 1:00 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Jul 29, 2026, 11:45 PM EDT · Map |
| Jul 29, 2026, 11:45 PM EDT | Jul 30, 2026, 12:40 AM EDT | Mystic River, MA | BOS009 CORNER OF SUMMER & NEW ST | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record dc969ca5-3951-45ae-965d-14a4c0666375, published Jul 30, 2026, 3:58 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Jul 29, 2026, 11:45 PM EDT · Map |
| Jul 22, 2026, 4:35 PM EDT | Jul 22, 2026, 4:55 PM EDT | “BOSTON INNER HARBOR” (not placed) | BOS003 SW CORNER OF LOGAN NW OF 90 | Combined sewer overflow | 95,034 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 6979bc51-a58b-42be-beaa-58e69334ba17, published Aug 12, 2026, 12:08 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Jul 22, 2026, 4:35 PM EDT · Map |
| Jul 22, 2026, 4:35 PM EDT | Jul 22, 2026, 4:55 PM EDT | “BOSTON INNER HARBOR” (not placed) | BOS003 SW CORNER OF LOGAN NW OF 90 | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 78daad35-b721-462d-9eb8-cdc481796b44, published Jul 23, 2026, 10:03 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Jul 22, 2026, 4:35 PM EDT · Map |
| Jul 22, 2026, 4:30 PM EDT | Jul 22, 2026, 4:45 PM EDT | “FORT POINT CHANNEL” (not placed) | BOS070 CORNER OF W 4TH ST AND FRONTAGE RD | Combined sewer overflow | 117,999 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 1c6a5449-7118-4901-b1a2-49ef805b4324, published Aug 12, 2026, 11:54 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Jul 22, 2026, 4:30 PM EDT · Map |
| Jul 22, 2026, 4:30 PM EDT | Jul 22, 2026, 4:45 PM EDT | “FORT POINT CHANNEL” (not placed) | BOS070 CORNER OF W 4TH ST AND FRONTAGE RD | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record b689b0fa-518a-4180-8e1c-93e772220a45, published Jul 23, 2026, 10:06 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Jul 22, 2026, 4:30 PM EDT · Map |
| Jul 22, 2026, 4:25 PM EDT | Jul 22, 2026, 4:50 PM EDT | Mystic River, MA | BOS009 CORNER OF SUMMER & NEW ST | Combined sewer overflow | 20,833 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 6ececfa1-717c-4b52-8e8c-8ddf37d34d44, published Aug 12, 2026, 12:10 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Jul 22, 2026, 4:25 PM EDT · Map |
| Jul 22, 2026, 4:25 PM EDT | Jul 22, 2026, 4:50 PM EDT | Mystic River, MA | BOS009 CORNER OF SUMMER & NEW ST | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 4d292010-644d-4052-95bd-54bb3faf79ef, published Jul 22, 2026, 6:56 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Jul 22, 2026, 4:25 PM EDT · Map |
| Jul 22, 2026, 4:20 PM EDT | Jul 22, 2026, 4:25 PM EDT | “FORT POINT CHANNEL” (not placed) | BOS064 INT DORCHESTER AVE & SUMMER ST | Combined sewer overflow | 1.25 million gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 2ac0cf91-a629-4075-9bbd-598b52fce462, published Aug 12, 2026, 11:51 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Jul 22, 2026, 4:20 PM EDT · Map |
| Jul 22, 2026, 4:20 PM EDT | Jul 22, 2026, 4:25 PM EDT | “FORT POINT CHANNEL” (not placed) | BOS064 INT DORCHESTER AVE & SUMMER ST | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 8ec52f37-749e-455d-95bc-b92a99e15a14, published Jul 23, 2026, 10:05 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Jul 22, 2026, 4:20 PM EDT · Map |
| Jul 21, 2026, 9:10 PM EDT | ended, time not reported | “FORT POINT CHANNEL” (not placed) | BOS070 CORNER OF W 4TH ST AND FRONTAGE RD | Combined sewer overflow | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 7015858b-aa1e-4345-ad59-4aece8e5ce80, published Jul 22, 2026, 10:57 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Jul 21, 2026, 9:10 PM EDT · Map |
| Jul 21, 2026, 6:20 PM EDT | Jul 21, 2026, 8:55 PM EDT | “BOSTON INNER HARBOR” (not placed) | BOS003 SW CORNER OF LOGAN NW OF 90 | Combined sewer overflow | 196,270 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 3b102034-f3e3-4cf7-bfee-d059dc8a3caa, published Aug 12, 2026, 11:39 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Jul 21, 2026, 6:20 PM EDT · Map |
| Jul 21, 2026, 6:20 PM EDT | Jul 21, 2026, 8:55 PM EDT | “BOSTON INNER HARBOR” (not placed) | BOS003 SW CORNER OF LOGAN NW OF 90 | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record a9010d1d-7cda-4334-b4f5-d241f518d057, published Jul 22, 2026, 8:48 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Jul 21, 2026, 6:20 PM EDT · Map |
| Jul 21, 2026, 6:15 PM EDT | Jul 21, 2026, 6:25 PM EDT | “FORT POINT CHANNEL” (not placed) | BOS070 CORNER OF W 4TH ST AND FRONTAGE RD | Combined sewer overflow | 21,910 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record a3d785e2-09ff-4f8c-9c78-21908c3cd36f, published Aug 12, 2026, 11:45 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Jul 21, 2026, 6:15 PM EDT · Map |
| Jul 21, 2026, 6:15 PM EDT | Jul 21, 2026, 8:50 PM EDT | Mystic River, MA | BOS009 CORNER OF SUMMER & NEW ST | Combined sewer overflow | 45,139 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record a406c3a6-3be5-4083-bceb-2677267ff2fc, published Aug 12, 2026, 11:42 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Jul 21, 2026, 6:15 PM EDT · Map |
| Jul 21, 2026, 6:15 PM EDT | Jul 21, 2026, 6:25 PM EDT | “FORT POINT CHANNEL” (not placed) | BOS070 CORNER OF W 4TH ST AND FRONTAGE RD | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record d0d25af9-4d93-447a-bfee-ab3ed8d71060, published Jul 22, 2026, 9:00 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Jul 21, 2026, 6:15 PM EDT · Map |
| Jul 21, 2026, 6:15 PM EDT | Jul 21, 2026, 8:50 PM EDT | Mystic River, MA | BOS009 CORNER OF SUMMER & NEW ST | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 771a6a50-3038-44fd-a076-699423e045c5, published Jul 22, 2026, 8:49 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Jul 21, 2026, 6:15 PM EDT · Map |
| Jul 7, 2026, 8:05 PM EDT | Jul 7, 2026, 10:00 PM EDT | “FORT POINT CHANNEL” (not placed) | BOS070 CORNER OF W 4TH ST AND FRONTAGE RD | Combined sewer overflow | 440,000 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 7976d672-5d6e-4992-9576-72a0553b6781, published Aug 12, 2026, 11:59 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Jul 7, 2026, 8:05 PM EDT · Map |
| Jul 7, 2026, 8:05 PM EDT | Jul 7, 2026, 10:00 PM EDT | “FORT POINT CHANNEL” (not placed) | BOS070 CORNER OF W 4TH ST AND FRONTAGE RD | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 5a4bbd67-04f0-4960-a138-a17a82b70f3d, published Jul 8, 2026, 9:56 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Jul 7, 2026, 8:05 PM EDT · Map |
| Jul 7, 2026, 6:45 PM EDT | Jul 7, 2026, 7:10 PM EDT | “BOSTON INNER HARBOR” (not placed) | BOS003 SW CORNER OF LOGAN NW OF 90 | Combined sewer overflow | 56,975 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 3db50104-0b35-4ef7-8774-b590cdfa8af6, published Aug 12, 2026, 11:25 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Jul 7, 2026, 6:45 PM EDT · Map |
| Jul 7, 2026, 6:45 PM EDT | Jul 7, 2026, 7:10 PM EDT | “BOSTON INNER HARBOR” (not placed) | BOS003 SW CORNER OF LOGAN NW OF 90 | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 915a4733-3182-468a-b30c-fede231c9b9b, published Jul 8, 2026, 9:53 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Jul 7, 2026, 6:45 PM EDT · Map |
| Jul 7, 2026, 6:15 PM EDT | Jul 7, 2026, 7:45 PM EDT | Mystic River, MA | BOS009 CORNER OF SUMMER & NEW ST | Combined sewer overflow | 65,972 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record fc067b97-cd89-42e6-a5be-e370d272ee55, published Aug 12, 2026, 11:28 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Jul 7, 2026, 6:15 PM EDT · Map |
| Jul 7, 2026, 6:15 PM EDT | Jul 7, 2026, 7:45 PM EDT | Mystic River, MA | BOS009 CORNER OF SUMMER & NEW ST | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 09a02de5-ff71-4c00-9dbb-0b4aec4e29d4, published Jul 8, 2026, 12:16 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Jul 7, 2026, 6:15 PM EDT · Map |
| Jun 18, 2026, 7:00 PM EDT | Jun 18, 2026, 7:10 PM EDT | “FORT POINT CHANNEL” (not placed) | BOS070 CORNER OF W 4TH ST AND FRONTAGE RD | Combined sewer overflow | 19,389 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 43180851-d3b7-41ed-bc27-66edf246176f, published Jul 6, 2026, 3:15 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Jun 18, 2026, 7:00 PM EDT · Map |
| Jun 18, 2026, 7:00 PM EDT | Jun 18, 2026, 7:05 PM EDT | “BOSTON INNER HARBOR” (not placed) | BOS003 SW CORNER OF LOGAN NW OF 90 | Combined sewer overflow | 9,264 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 6861dd19-4091-4495-b831-ef268e7aaba4, published Jul 6, 2026, 3:13 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Jun 18, 2026, 7:00 PM EDT · Map |
| Jun 18, 2026, 7:00 PM EDT | Jun 18, 2026, 7:10 PM EDT | “FORT POINT CHANNEL” (not placed) | BOS070 CORNER OF W 4TH ST AND FRONTAGE RD | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record e31ec21d-8e3d-4647-9d59-48e912e7da07, published Jun 24, 2026, 8:56 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Jun 18, 2026, 7:00 PM EDT · Map |
| Jun 18, 2026, 7:00 PM EDT | Jun 18, 2026, 7:05 PM EDT | “BOSTON INNER HARBOR” (not placed) | BOS003 SW CORNER OF LOGAN NW OF 90 | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 8eedeeb9-edda-4307-a375-b706f4344b67, published Jun 24, 2026, 8:53 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, Jun 18, 2026, 7:00 PM EDT · Map |
| May 19, 2026, 6:40 PM EDT | May 20, 2026, 9:00 AM EDT | Mystic River, MA | BOS010 WEST OF BORDER ST ON EAST BANK BOS INNER HRBR | Combined sewer overflow | 223,567 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 21b203bc-daa1-44b7-8df8-ba34511c6861, published Jun 11, 2026, 4:13 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, May 19, 2026, 6:40 PM EDT · Map |
| May 19, 2026, 6:40 PM EDT | May 20, 2026, 9:00 AM EDT | Mystic River, MA | BOS010 WEST OF BORDER ST ON EAST BANK BOS INNER HRBR | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 9fd4f718-7abe-4b16-bd02-f05a41a83298, published May 20, 2026, 11:10 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, May 19, 2026, 6:40 PM EDT · Map |
| May 19, 2026, 6:35 PM EDT | May 19, 2026, 6:45 PM EDT | “FORT POINT CHANNEL” (not placed) | BOS070 CORNER OF W 4TH ST AND FRONTAGE RD | Combined sewer overflow | 50,187 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 38f5fd54-0e03-4ba6-8c32-dbae259a499d, published Jun 11, 2026, 3:53 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, May 19, 2026, 6:35 PM EDT · Map |
| May 19, 2026, 6:35 PM EDT | May 19, 2026, 6:45 PM EDT | “FORT POINT CHANNEL” (not placed) | BOS070 CORNER OF W 4TH ST AND FRONTAGE RD | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record fbb09dab-693f-46bd-a7cb-e3cb6a78498c, published May 22, 2026, 10:51 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, May 19, 2026, 6:35 PM EDT · Map |
| May 13, 2026, 9:35 PM EDT | May 14, 2026, 12:25 AM EDT | Mystic River, MA | BOS010 WEST OF BORDER ST ON EAST BANK BOS INNER HRBR | Combined sewer overflow | 3,269 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 1b44e4ec-fd76-412b-b023-26622bfc79ba, published Jun 12, 2026, 9:21 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, May 13, 2026, 9:35 PM EDT · Map |
| May 13, 2026, 9:35 PM EDT | May 14, 2026, 12:25 AM EDT | Mystic River, MA | BOS010 WEST OF BORDER ST ON EAST BANK BOS INNER HRBR | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record d49b4b8d-d075-4f2d-bad7-bbdaf31a0b3e, published May 14, 2026, 9:26 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, BOSTON WATER & SEWER COMMISSION, May 13, 2026, 9:35 PM EDT · Map |
| Mar 17, 2026, 6:40 AM EDT | Mar 17, 2026, 6:50 AM EDT | “FORT POINT CHANNEL” (not placed) | BOS070 CORNER OF W 4TH ST AND FRONTAGE RD | Combined sewer overflow | 0 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 06598b98-d3c3-42a9-8a04-093524b4acf3, published Apr 14, 2026, 5:05 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) | |||||||
| Mar 17, 2026, 6:40 AM EDT | Mar 17, 2026, 6:50 AM EDT | “FORT POINT CHANNEL” (not placed) | BOS070 CORNER OF W 4TH ST AND FRONTAGE RD | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record bd388e27-b8fa-4b31-876b-e9bfa01e7ef5, published Mar 17, 2026, 3:26 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 14, 2025, 6:05 PM EDT | Oct 14, 2025, 8:30 PM EDT | Mystic River, MA | BOS010 WEST OF BORDER ST ON EAST BANK BOS INNER HRBR | Combined sewer overflow | 47,000 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 1710d57c-8d1a-4e31-bfee-830701ec35ff, published Nov 14, 2025, 5:13 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) | |||||||
| Oct 14, 2025, 6:05 PM EDT | Oct 14, 2025, 8:30 PM EDT | Mystic River, MA | BOS010 WEST OF BORDER ST ON EAST BANK BOS INNER HRBR | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 9fc1950f-5749-45d2-8978-32eb0f6b2a3b, published Oct 15, 2025, 9:36 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) | |||||||
| Oct 14, 2025, 3:50 PM EDT | ended, time not reported | Mystic River, MA | BOS009 CORNER OF SUMMER & NEW ST | Combined sewer overflow | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 38b8bb2f-8afe-4d69-aaf8-ecb7d6f2ed4e, published Oct 13, 2025, 10:02 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 14, 2025, 1:05 PM EDT | ended, time not reported | “FORT POINT CHANNEL” (not placed) | BOS070 CORNER OF W 4TH ST AND FRONTAGE RD | Combined sewer overflow | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record e6854a21-682e-4d0e-b792-fedc7489ec76, published Oct 13, 2025, 10:04 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 13, 2025, 3:50 PM EDT | Oct 13, 2025, 5:40 PM EDT | Mystic River, MA | BOS009 CORNER OF SUMMER & NEW ST | Combined sewer overflow | 80,000 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record b0907a4f-3106-473a-8e1b-e15f359b52b7, published Nov 14, 2025, 5:03 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) | |||||||
| Oct 13, 2025, 1:05 PM EDT | Oct 13, 2025, 6:35 PM EDT | “FORT POINT CHANNEL” (not placed) | BOS070 CORNER OF W 4TH ST AND FRONTAGE RD | Combined sewer overflow | 2.63 million gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 95b86760-1b23-41c1-921b-d29ce17e7c95, published Nov 14, 2025, 5:07 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) | |||||||
| Oct 9, 2025, 7:00 PM EDT | Oct 9, 2025, 9:45 PM EDT | Mystic River, MA | BOS010 WEST OF BORDER ST ON EAST BANK BOS INNER HRBR | Combined sewer overflow | 11,000 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record c6bb5f9a-b134-42f1-b533-f9ebd4974fce, published Nov 14, 2025, 4:52 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) | |||||||
| Oct 9, 2025, 7:00 PM EDT | Oct 9, 2025, 9:45 PM EDT | Mystic River, MA | BOS010 WEST OF BORDER ST ON EAST BANK BOS INNER HRBR | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 8de129b7-14b6-4fb7-b89f-6602b9c98dbf, published Oct 10, 2025, 9:54 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) | |||||||
| Oct 8, 2025, 9:15 AM EDT | Oct 8, 2025, 9:35 AM EDT | “FORT POINT CHANNEL” (not placed) | BOS070 CORNER OF W 4TH ST AND FRONTAGE RD | Combined sewer overflow | 117,000 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record be8ab1e6-266a-467c-aebe-05b5a82d6787, published Nov 18, 2025, 10:54 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) | |||||||
| Oct 8, 2025, 9:15 AM EDT | Oct 8, 2025, 9:50 AM EDT | “BOSTON INNER HARBOR” (not placed) | BOS003 SW CORNER OF LOGAN NW OF 90 | Combined sewer overflow | 133,000 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 3881f0e8-92fa-4423-9012-e94b09f9f7d7, published Nov 18, 2025, 10:27 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) | |||||||
| Oct 8, 2025, 9:15 AM EDT | Oct 8, 2025, 9:35 AM EDT | “FORT POINT CHANNEL” (not placed) | BOS070 CORNER OF W 4TH ST AND FRONTAGE RD | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 1c7e209d-60ec-4bec-8f07-00b7f154f88f, published Oct 10, 2025, 10:41 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) | |||||||
| Oct 8, 2025, 9:15 AM EDT | Oct 8, 2025, 9:50 AM EDT | “BOSTON INNER HARBOR” (not placed) | BOS003 SW CORNER OF LOGAN NW OF 90 | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 26974f6d-35e6-46ae-a6a2-ccb2871f7920, published Oct 10, 2025, 9:58 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) | |||||||
| Oct 8, 2025, 9:10 AM EDT | Oct 8, 2025, 6:45 PM EDT | Mystic River, MA | BOS010 WEST OF BORDER ST ON EAST BANK BOS INNER HRBR | Combined sewer overflow | 1.58 million gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record fb2d9148-c247-472f-af19-96092600eae1, published Nov 18, 2025, 10:31 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) | |||||||
| Oct 8, 2025, 9:10 AM EDT | Oct 8, 2025, 6:45 PM EDT | Mystic River, MA | BOS010 WEST OF BORDER ST ON EAST BANK BOS INNER HRBR | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 71f05f21-7cfc-4b39-9894-5e10ab2e42de, published Oct 10, 2025, 10:06 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) | |||||||
| Sep 25, 2025, 10:35 AM EDT | Sep 25, 2025, 11:35 AM EDT | “FORT POINT CHANNEL” (not placed) | BOS070 CORNER OF W 4TH ST AND FRONTAGE RD | Combined sewer overflow | 277,000 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 3eac06e7-ed49-403b-a76d-5cdebf09d7a0, published Oct 15, 2025, 1:05 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 25, 2025, 10:35 AM EDT | Sep 25, 2025, 11:35 AM EDT | “FORT POINT CHANNEL” (not placed) | BOS070 CORNER OF W 4TH ST AND FRONTAGE RD | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 1fd8611d-f4d5-4465-bdd0-a555037cbad6, published Oct 15, 2025, 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) | |||||||
| Sep 25, 2025, 10:35 AM EDT | Sep 25, 2025, 11:35 AM EDT | “FORT POINT CHANNEL” (not placed) | BOS070 CORNER OF W 4TH ST AND FRONTAGE RD | Combined sewer overflow | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 8c14fac5-ef8f-4b77-a1d0-8cdd3283bdb3, published Sep 25, 2025, 3:39 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 25, 2025, 10:00 AM EDT | Sep 25, 2025, 10:15 AM EDT | “BOSTON INNER HARBOR” (not placed) | BOS060 NE CORNER OF NE AQUARIUM PIER | Combined sewer overflow | 10,000 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 0a020355-b938-4b91-a417-99efb28af49c, published Oct 14, 2025, 4:40 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 25, 2025, 10:00 AM EDT | Sep 25, 2025, 10:45 AM EDT | Mystic River, MA | BOS010 WEST OF BORDER ST ON EAST BANK BOS INNER HRBR | Combined sewer overflow | 20,000 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record b9bee524-e5fa-43b9-bec1-a13e145c1813, published Oct 14, 2025, 4:36 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 25, 2025, 10:00 AM EDT | Sep 25, 2025, 10:30 AM EDT | “BOSTON INNER HARBOR” (not placed) | BOS003 SW CORNER OF LOGAN NW OF 90 | Combined sewer overflow | 140,000 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 366fd3d4-8ab8-4ef6-a147-60cf6f865c84, published Oct 14, 2025, 4:25 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) | |||||||
| Sep 25, 2025, 10:00 AM EDT | Sep 25, 2025, 10:15 AM EDT | “BOSTON INNER HARBOR” (not placed) | BOS060 NE CORNER OF NE AQUARIUM PIER | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record b32f0dbc-5e91-46de-b7bf-f066a6e32545, published Sep 26, 2025, 9:26 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) | |||||||
| Sep 25, 2025, 10:00 AM EDT | Sep 25, 2025, 10:45 AM EDT | Mystic River, MA | BOS010 WEST OF BORDER ST ON EAST BANK BOS INNER HRBR | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 6a802cf5-c499-40b2-ab6b-dc44a5e8a6aa, published Sep 25, 2025, 3:36 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 25, 2025, 10:00 AM EDT | Sep 25, 2025, 10:30 AM EDT | “BOSTON INNER HARBOR” (not placed) | BOS003 SW CORNER OF LOGAN NW OF 90 | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record ce7a9265-6f36-44a9-9269-b202d007c033, published Sep 25, 2025, 3:35 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 25, 2025, 9:25 AM EDT | Sep 25, 2025, 10:15 AM EDT | “FORT POINT CHANNEL” (not placed) | BOS070 CORNER OF W 4TH ST AND FRONTAGE RD | Combined sewer overflow | 200,000 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 978995cc-19e5-4198-b789-add47a7f8bdd, published Oct 14, 2025, 4:43 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 29, 2025, 11:45 AM EDT | Aug 29, 2025, 11:45 AM EDT | “FORT POINT CHANNEL” (not placed) | BOS070 CORNER OF W 4TH ST AND FRONTAGE RD | Combined sewer overflow | 0 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record b6983f19-6831-41b4-825e-774fc04a5df4, published Sep 15, 2025, 8:26 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 29, 2025, 11:45 AM EDT | Aug 29, 2025, 11:45 AM EDT | “FORT POINT CHANNEL” (not placed) | BOS070 CORNER OF W 4TH ST AND FRONTAGE RD | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 789bf3dd-693d-4dac-bad5-3edc01a9469c, published Aug 30, 2025, 9:52 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, 2025, 9:15 AM EDT | Jul 10, 2025, 12:20 PM EDT | “FORT POINT CHANNEL” (not placed) | BOS070 CORNER OF W 4TH ST AND FRONTAGE RD | Combined sewer overflow | 590,000 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record f1b17086-3764-42f9-81fe-46785e9ba6f0, published Aug 14, 2025, 1:31 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, 2025, 9:15 AM EDT | Jul 10, 2025, 12:20 PM EDT | “FORT POINT CHANNEL” (not placed) | BOS070 CORNER OF W 4TH ST AND FRONTAGE RD | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 857a9e33-4d57-45c5-9cbf-bec1e8bc6c45, published Jul 10, 2025, 4:05 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) | |||||||
| Jun 8, 2025, 4:00 PM EDT | ended, time not reported | “FORT POINT CHANNEL” (not placed) | BOS070 CORNER OF W 4TH ST AND FRONTAGE RD | Combined sewer overflow | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 9591c45a-1caf-48f6-8b27-c9f3e976f2e8, published Jun 7, 2025, 8:46 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) | |||||||
| Jun 7, 2025, 5:50 PM EDT | Jun 7, 2025, 6:30 PM EDT | “FORT POINT CHANNEL” (not placed) | BOS070 CORNER OF W 4TH ST AND FRONTAGE RD | Combined sewer overflow | 630,000 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 05479b03-27e9-4f05-a3c4-fc7f63f3f784, published Jul 10, 2025, 9:43 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 23, 2025, 5:30 AM EDT | ended, time not reported | “BOSTON INNER HARBOR” (not placed) | BOS060 NE CORNER OF NE AQUARIUM PIER | Combined sewer overflow | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 922cd8d0-3381-475c-b277-f1bb8f25d043, published May 24, 2025, 10:58 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 23, 2025, 12:00 AM EDT | May 23, 2025, 3:30 AM EDT | “FORT POINT CHANNEL” (not placed) | BOS065 WEST BANK OF FORT POINT CHANNEL | Combined sewer overflow | 320,000 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 4af11096-5f27-4d64-aed0-1645c6081b04, published Jun 13, 2025, 3:28 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 22, 2025, 11:55 PM EDT | May 23, 2025, 3:10 AM EDT | “RESERVED CHANNEL” (not placed) | BOS076 OFF PAPPAS WAY | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record fe40192f-8f0e-41e7-9da4-d6d1bef05bf7, published May 23, 2025, 12:33 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) | |||||||
| May 22, 2025, 11:00 PM EDT | May 22, 2025, 11:35 PM EDT | “FORT POINT CHANNEL” (not placed) | BOS073 JUST NORTH OF PIKE ON EAST BANK OF FORT POINT CHANNEL | Combined sewer overflow | 60,000 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record add45608-e92a-431e-bda4-19c697fda1a7, published Jun 13, 2025, 3:53 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 22, 2025, 10:20 PM EDT | May 23, 2025, 4:35 AM EDT | “LITTLE MYSTIC CHANNEL” (not placed) | BOS019 JUST NW OF TOBIN BRIDGE AND 16TH ST | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record db2978c9-2e5d-4c89-adcf-265e31743d87, published May 23, 2025, 12:17 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 22, 2025, 10:05 PM EDT | May 23, 2025, 4:35 AM EDT | “LITTLE MYSTIC CHANNEL” (not placed) | BOS019 JUST NW OF TOBIN BRIDGE AND 16TH ST | Combined sewer overflow | 460,000 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record ee5486cf-1de9-4019-ba93-c30b2cb25f04, published Jun 13, 2025, 3:03 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) | |||||||
| May 22, 2025, 9:55 PM EDT | May 23, 2025, 12:50 AM EDT | “RESERVED CHANNEL” (not placed) | BOS078 170 FT NORTH OF INTER E 1ST ST & I ST | Combined sewer overflow | 560,000 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 5ce70684-cc9e-456a-b5b9-22f67e590fa8, published Jun 13, 2025, 4:02 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 22, 2025, 9:55 PM EDT | May 22, 2025, 11:15 PM EDT | “FORT POINT CHANNEL” (not placed) | BOS068 FORT POINT CHANNEL WEST BANK INT 90 AND 93 | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 737bbe78-d825-4e9e-aeb8-947c1fddda81, published May 23, 2025, 12:30 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 22, 2025, 9:45 PM EDT | May 22, 2025, 11:30 PM EDT | Mystic River, MA | BOS010 WEST OF BORDER ST ON EAST BANK BOS INNER HRBR | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 678ae837-c9ee-4324-bb22-3f24e547aa96, published May 23, 2025, 12:14 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 22, 2025, 9:45 PM EDT | May 22, 2025, 11:40 PM EDT | Mystic River, MA | BOS009 CORNER OF SUMMER & NEW ST | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 70e19c62-5892-4f88-b2d5-3a29aed0359f, published May 23, 2025, 12:12 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 22, 2025, 9:20 PM EDT | May 22, 2025, 11:15 PM EDT | “FORT POINT CHANNEL” (not placed) | BOS068 FORT POINT CHANNEL WEST BANK INT 90 AND 93 | Combined sewer overflow | 310,000 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record b571cca8-170f-45a5-826c-0271377adb88, published Jun 13, 2025, 3:31 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 22, 2025, 8:30 PM EDT | May 23, 2025, 3:00 AM EDT | “BOSTON INNER HARBOR” (not placed) | BOS060 NE CORNER OF NE AQUARIUM PIER | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record d2e288c2-d88b-4472-a60e-109ed3aadfa6, published May 23, 2025, 12:20 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 22, 2025, 8:30 PM EDT | May 23, 2025, 1:40 AM EDT | “BOSTON INNER HARBOR” (not placed) | BOS057 EASTERN AVE | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 5dc191e6-4de6-47a5-a484-342fbace9c80, published May 23, 2025, 12:19 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 22, 2025, 8:25 PM EDT | May 22, 2025, 11:40 PM EDT | Mystic River, MA | BOS009 CORNER OF SUMMER & NEW ST | Combined sewer overflow | 50,000 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record f1763210-9fde-4a3d-a97b-19ce2d97629a, published Jun 13, 2025, 2:56 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 22, 2025, 8:10 PM EDT | ended, time not reported | “FORT POINT CHANNEL” (not placed) | BOS065 WEST BANK OF FORT POINT CHANNEL | Combined sewer overflow | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 8ea61a59-2eb3-40a5-b9b9-c24b9e8a780d, published May 23, 2025, 12:24 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 22, 2025, 8:05 PM EDT | May 23, 2025, 12:50 AM EDT | “RESERVED CHANNEL” (not placed) | BOS078 170 FT NORTH OF INTER E 1ST ST & I ST | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 15cd6909-59fc-4073-bd06-25f98a1ae24a, published May 23, 2025, 12:35 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 22, 2025, 7:50 PM EDT | May 23, 2025, 1:05 AM EDT | “BOSTON INNER HARBOR” (not placed) | BOS004 TOMAHAWK ST | Combined sewer overflow | 70,000 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 189cfb7b-4d0b-435b-a523-ab962d8492b9, published Jun 13, 2025, 2:51 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 22, 2025, 7:50 PM EDT | May 23, 2025, 1:05 AM EDT | “BOSTON INNER HARBOR” (not placed) | BOS004 TOMAHAWK ST | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 0766dd51-dcff-4f9e-8355-11fb16b8f643, published May 23, 2025, 12:10 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) | |||||||
| May 22, 2025, 7:45 PM EDT | May 23, 2025, 3:00 AM EDT | “BOSTON INNER HARBOR” (not placed) | BOS060 NE CORNER OF NE AQUARIUM PIER | Combined sewer overflow | 200,000 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 8ca9957e-6cd8-41dd-ac91-927dfb442eb5, published Jun 13, 2025, 3:08 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 22, 2025, 7:45 PM EDT | May 22, 2025, 8:05 PM EDT | Mystic River, MA | BOS017 BETWN SPRINGFIELD COLLEGE 465 MEDFORD RD | Combined sewer overflow | 30,000 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 7939d22a-019c-4b38-b321-add862da5a5f, published Jun 13, 2025, 3:01 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 22, 2025, 7:45 PM EDT | May 22, 2025, 8:05 PM EDT | Mystic River, MA | BOS017 BETWN SPRINGFIELD COLLEGE 465 MEDFORD RD | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record eeaff333-3802-4ea0-9de7-19ad7bcfb4dd, published May 23, 2025, 12:16 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 22, 2025, 7:40 PM EDT | May 23, 2025, 12:05 AM EDT | “FORT POINT CHANNEL” (not placed) | BOS062 SEAPORT BLVD JUST BEFORE INT W/93 | Combined sewer overflow | 720,000 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 691f8d46-478c-4ddd-92d2-1fc113a5dcc1, published Jun 13, 2025, 3:10 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) | |||||||
| May 22, 2025, 7:40 PM EDT | May 23, 2025, 12:05 AM EDT | “FORT POINT CHANNEL” (not placed) | BOS062 SEAPORT BLVD JUST BEFORE INT W/93 | Combined sewer overflowrevised | not reported | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record ffe53bec-5ea6-43f6-9f37-8af2a124057b, published May 23, 2025, 12:21 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 22, 2025, 7:35 PM EDT | May 23, 2025, 3:10 AM EDT | “RESERVED CHANNEL” (not placed) | BOS076 OFF PAPPAS WAY | Combined sewer overflow | 270,000 gal | BOSTON WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record be8971c6-ec99-433c-8785-251bde9934a3, published Jun 13, 2025, 3:58 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) | |||||||
Showing the newest 100 events of 601 events. See them all with filters.
History
- Discharge events, last 12 months23Dec 2025 to Nov 2026
- Days with a discharge, last 12 months15Dec 2025 to Nov 2026
- Hours under advisory, last 12 months469Dec 2025 to Nov 2026; on this discharger's reports
- 2026 season under advisory9.5%May to October; 421 h
Discharge events per month
328 events, Jan 2022 to Nov 2026. Counted from 327 verified or annual reports, 1 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 | 6 | 0 | 0 | 6 | Verified or annual reports | |
| Sep 2022 | 1 | 0 | 0 | 1 | Verified or annual reports | |
| Oct 2022 | 5 | 0 | 0 | 5 | Verified or annual reports | |
| Nov 2022 | 2 | 0 | 0 | 2 | Verified or annual reports | |
| Dec 2022 | 1 | 0 | 0 | 1 | Verified or annual reports | |
| Jan 2023 | 4 | 0 | 0 | 4 | Verified or annual reports | |
| Feb 2023 | 0 | 0 | 0 | 0 | ||
| Mar 2023 | 8 | 0 | 0 | 8 | Verified or annual reports | |
| Apr 2023 | 4 | 0 | 0 | 4 | Verified or annual reports | |
| May 2023 | 6 | 0 | 0 | 6 | Verified or annual reports | |
| Jun 2023 | 13 | 0 | 0 | 13 | Verified or annual reports | |
| Jul 2023 | 63 | 0 | 0 | 63 | Verified or annual reports | |
| Aug 2023 | 31 | 0 | 0 | 31 | Verified or annual reports | |
| Sep 2023 | 7 | 0 | 0 | 7 | Verified or annual reports | |
| Oct 2023 | 0 | 0 | 0 | 0 | ||
| Nov 2023 | 0 | 0 | 0 | 0 | ||
| Dec 2023 | 14 | 0 | 0 | 14 | Verified or annual reports | |
| Jan 2024 | 23 | 0 | 0 | 23 | Verified or annual reports | |
| Feb 2024 | 1 | 0 | 0 | 1 | Verified or annual reports | |
| Mar 2024 | 20 | 0 | 0 | 20 | Verified or annual reports | |
| Apr 2024 | 6 | 0 | 0 | 6 | Verified or annual reports | |
| May 2024 | 9 | 0 | 0 | 9 | Verified or annual reports | |
| Jun 2024 | 14 | 0 | 0 | 14 | Verified or annual reports | |
| Jul 2024 | 2 | 0 | 0 | 2 | Verified or annual reports | |
| Aug 2024 | 10 | 0 | 0 | 10 | Verified or annual reports | |
| Sep 2024 | 0 | 0 | 0 | 0 | ||
| Oct 2024 | 0 | 0 | 0 | 0 | ||
| Nov 2024 | 1 | 0 | 0 | 1 | Verified or annual reports | |
| Dec 2024 | 11 | 0 | 0 | 11 | Verified or annual reports | |
| Jan 2025 | 0 | 0 | 0 | 0 | ||
| Feb 2025 | 1 | 0 | 0 | 1 | Verified or annual reports | |
| Mar 2025 | 6 | 0 | 0 | 6 | Verified or annual reports | |
| Apr 2025 | 2 | 0 | 0 | 2 | Verified or annual reports | |
| May 2025 | 19 | 0 | 0 | 19 | Verified or annual reports | |
| Jun 2025 | 1 | 0 | 0 | 1 | Verified or annual reports | |
| Jul 2025 | 1 | 0 | 0 | 1 | Verified or annual reports | |
| Aug 2025 | 1 | 0 | 0 | 1 | Verified or annual reports | |
| Sep 2025 | 5 | 0 | 0 | 5 | Verified or annual reports | |
| Oct 2025 | 7 | 0 | 0 | 7 | Verified or annual reports | |
| 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 | 1 | 0 | 0 | 1 | Verified or annual reports | |
| Apr 2026 | 0 | 0 | 0 | 0 | ||
| May 2026 | 3 | 0 | 0 | 3 | Verified or annual reports | |
| Jun 2026 | 2 | 0 | 0 | 2 | Verified or annual reports | |
| Jul 2026 | 11 | 0 | 0 | 11 | Verified or annual reports | |
| Aug 2026 | 0 | 0 | 0 | 0 | ||
| Sep 2026 | 5 | 0 | 0 | 5 | Verified or annual reports | |
| Oct 2026 | 1 | 0 | 0 | 1 | Public notices (no report yet) | |
| 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. 1 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 | 194 | 194 | 744 | |
| Sep 2022 | 48 | 48 | 720 | |
| Oct 2022 | 62 | 62 | 744 | |
| Nov 2022 | 5 | 5 | 720 | |
| Dec 2022 | 93 | 93 | 744 | |
| Jan 2023 | 53 | 53 | 744 | |
| Feb 2023 | 0 | 0 | 672 | |
| Mar 2023 | 112 | 112 | 744 | |
| Apr 2023 | 119 | 119 | 720 | |
| May 2023 | 102 | 102 | 744 | |
| Jun 2023 | 202 | 202 | 720 | |
| Jul 2023 | 413 | 413 | 744 | |
| Aug 2023 | 354 | 354 | 744 | |
| Sep 2023 | 126 | 126 | 720 | |
| Oct 2023 | 0 | 0 | 744 | |
| Nov 2023 | 0 | 0 | 720 | |
| Dec 2023 | 172 | 172 | 744 | |
| Jan 2024 | 120 | 120 | 744 | |
| Feb 2024 | 48 | 48 | 696 | |
| Mar 2024 | 220 | 220 | 744 | |
| Apr 2024 | 148 | 148 | 720 | |
| May 2024 | 136 | 136 | 744 | |
| Jun 2024 | 162 | 162 | 720 | |
| Jul 2024 | 48 | 48 | 744 | |
| Aug 2024 | 145 | 145 | 744 | |
| Sep 2024 | 0 | 0 | 720 | |
| Oct 2024 | 0 | 0 | 744 | |
| Nov 2024 | 48 | 48 | 720 | |
| Dec 2024 | 59 | 59 | 744 | |
| Jan 2025 | 0 | 0 | 744 | |
| Feb 2025 | 49 | 49 | 672 | |
| Mar 2025 | 100 | 100 | 744 | |
| Apr 2025 | 98 | 98 | 720 | |
| May 2025 | 157 | 157 | 744 | |
| Jun 2025 | 49 | 49 | 720 | |
| Jul 2025 | 51 | 51 | 744 | |
| Aug 2025 | 48 | 48 | 744 | |
| Sep 2025 | 50 | 50 | 720 | |
| Oct 2025 | 164 | 164 | 744 | |
| Nov 2025 | 0 | 0 | 720 | |
| Dec 2025 | 0 | 0 | 744 | |
| Jan 2026 | 0 | 0 | 744 | |
| Feb 2026 | 0 | 0 | 672 | |
| Mar 2026 | 48 | 48 | 744 | |
| Apr 2026 | 0 | 0 | 720 | |
| May 2026 | 113 | 113 | 744 | |
| Jun 2026 | 48 | 48 | 720 | |
| Jul 2026 | 171 | 171 | 744 | |
| Aug 2026 | 1 | 1 | 744 | |
| Sep 2026 | 88 | 88 | 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 | 4 | |
| Sep 2022 | 1 | |
| Oct 2022 | 2 | |
| Nov 2022 | 1 | |
| Dec 2022 | 1 | |
| Jan 2023 | 1 | |
| Feb 2023 | 0 | |
| Mar 2023 | 2 | |
| Apr 2023 | 3 | |
| May 2023 | 3 | |
| Jun 2023 | 6 | |
| Jul 2023 | 11 | |
| Aug 2023 | 7 | |
| Sep 2023 | 3 | |
| Oct 2023 | 0 | |
| Nov 2023 | 0 | |
| Dec 2023 | 5 | |
| Jan 2024 | 2 | |
| Feb 2024 | 1 | |
| Mar 2024 | 6 | |
| Apr 2024 | 3 | |
| May 2024 | 3 | |
| Jun 2024 | 4 | |
| Jul 2024 | 1 | |
| Aug 2024 | 4 | |
| Sep 2024 | 0 | |
| Oct 2024 | 0 | |
| Nov 2024 | 1 | |
| Dec 2024 | 2 | |
| Jan 2025 | 0 | |
| Feb 2025 | 1 | |
| Mar 2025 | 2 | |
| Apr 2025 | 2 | |
| May 2025 | 4 | |
| Jun 2025 | 1 | |
| Jul 2025 | 1 | |
| Aug 2025 | 1 | |
| Sep 2025 | 1 | |
| Oct 2025 | 4 | |
| Nov 2025 | 0 | |
| Dec 2025 | 0 | |
| Jan 2026 | 0 | |
| Feb 2026 | 0 | |
| Mar 2026 | 1 | |
| Apr 2026 | 0 | |
| May 2026 | 4 | |
| Jun 2026 | 1 | |
| Jul 2026 | 5 | |
| Aug 2026 | 0 | |
| Sep 2026 | 3 | |
| Oct 2026 | 1 | |
| Nov 2026 | 0 |
Reported volume per year
Gallons, summed from the 327 events that gave a number (1 did not).
- Partly covered or sparse source
1 of 328 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 | 1,361,100 | 15 | 0 | Partly covered or sparse source |
| 2023 | 125,786,380 | 150 | 0 | |
| 2024 | 68,749,020 | 97 | 0 | |
| 2025 | 32,247,000 | 43 | 0 | |
| 2026 | 39,801,236 | 22 | 1 |
Hours under advisory per year
Hours under advisory each year; 2026 to date.
- Advisory in effect
- Partly covered or sparse source
1 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 | 401 | 4.6% | Partly covered or sparse source |
| 2023 | 1,653 | 18.9% | |
| 2024 | 1,134 | 12.9% | |
| 2025 | 766 | 8.7% | |
| 2026 | 469 | 6.4% |
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 | 27 | 4 |
| Feb | 2 | 4 |
| Mar | 35 | 4 |
| Apr | 12 | 4 |
| May | 37 | 4 |
| Jun | 30 | 5 |
| Jul | 77 | 5 |
| Aug | 48 | 5 |
| Sep | 18 | 5 |
| Oct | 13 | 5 |
| Nov | 3 | 5 |
| Dec | 26 | 4 |
Discharge events by outfall
The 10 outfalls with the most events of 22, 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 |
|---|---|
| BOS070 CORNER OF W 4TH ST AND FRONTAGE RD | 85 |
| BOS003 SW CORNER OF LOGAN NW OF 90 | 49 |
| BOS009 CORNER OF SUMMER & NEW ST | 39 |
| BOS062 SEAPORT BLVD JUST BEFORE INT W/93 | 18 |
| BOS019 JUST NW OF TOBIN BRIDGE AND 16TH ST | 14 |
| BOS064 INT DORCHESTER AVE & SUMMER ST | 14 |
| BOS046 @PUMP STNS NE OF MFA | 12 |
| BOS013 JUST NORTH OF NAY ST ON MCARDLE BRIDGE | 12 |
| BOS065 WEST BANK OF FORT POINT CHANNEL | 11 |
| BOS010 WEST OF BORDER ST ON EAST BANK BOS INNER HRBR | 11 |
| Other outfalls (12) | 63 |
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