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Sewage discharges in Massachusetts

51 waters tracked: 0 red, 2 yellow, 13 unresolved, 36 with no current report, as of Nov 2, 2026, 6:56 AM EST. 84 discharges reported in the last 30 days.

Source: DirtyWaterWatch statuses from the 1 feed listed under Coverage below, as of 2026-11-02 11:56 UTC.

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.

Caution Caution: 2 waters

Unresolved: no end reported Unresolved: no end reported: 13 waters

No current report No current report: 36 waters

Dischargers

Coverage

What the authority says about the period after a discharge

48 hours after the discharge ends. Basis: “314 CMR 16.04(10)(g): every notice must say "Avoid contact with these water bodies for 48 hours after the discharge or overflow ceases"”

Source: rules.json red.by_state.MA (research/ma/report.md).

How long a water stays coloured, in every state

Feeds we read

55 other sources considered for Massachusetts are listed on the sources page.

Discharges in Massachusetts over the years

  • Discharge events, last 12 months1,295Dec 2025 to Nov 2026
  • Days with a discharge, last 12 months154Dec 2025 to Nov 2026
  • Hours under advisory, last 12 months4,762Dec 2025 to Nov 2026; on at least one water in the state
  • 2026 season under advisory65%May to October; 2,871 h

Discharge events per month

10,332 events, Jan 2022 to Nov 2026. Counted from 9,956 verified or annual reports, 373 public notices, 3 other source reports.

  • Combined sewer overflow
  • Sanitary sewer overflow
  • Bypass, blended or other
  • No source
  • Partly covered or sparse source

No source covers 2022-01 to 2022-04. EPA ECHO sewer overflow records are sparse (only what permittees file with EPA). MassDEP portal records begin 2022-06-30. Verified Data Reports arrive after the month ends, so the latest months count public notices. Some dischargers here report only monthly or yearly totals; those are shown under reported totals, not counted here.

Sources: EPA ECHO sewer overflow events; MassDEP sewage notification portal. Covered 2022-05-03 to 2026-11-02.

Show table
Discharge events per month
MonthCombined sewer overflowSanitary sewer overflowBypass, blended or otherTotalCounted fromCoverage
Jan 20220000No source
Feb 20220000No source
Mar 20220000No source
Apr 20220000No source
May 20220000Partly covered or sparse source
Jun 20220101Public notices (no report yet)Partly covered or sparse source
Jul 202220825215Reports and notices
Aug 202219225199Reports and notices
Sep 2022280117298Reports and notices
Oct 2022250010260Verified or annual reports
Nov 2022190011201Reports and notices
Dec 2022177315195Verified or annual reports
Jan 20232421116269Verified or annual reports
Feb 2023363342Verified or annual reports
Mar 20231241224160Reports and notices
Apr 2023217012229Verified or annual reports
May 2023158312173Verified or annual reports
Jun 2023363815386Verified or annual reports
Jul 20237102045775Reports and notices
Aug 20233911621428Verified or annual reports
Sep 2023375625406Verified or annual reports
Oct 202311516122Verified or annual reports
Nov 2023812487Verified or annual reports
Dec 20232771647340Reports and notices
Jan 20243104666422Reports and notices
Feb 2024571765Reports and notices
Mar 2024357959425Reports and notices
Apr 2024165520190Verified or annual reports
May 2024263313279Reports and notices
Jun 202427209281Verified or annual reports
Jul 2024176212190Verified or annual reports
Aug 2024222516243Verified or annual reports
Sep 2024671472Verified or annual reports
Oct 2024212124Verified or annual reports
Nov 2024630568Verified or annual reports
Dec 2024200714221Verified or annual reports
Jan 2025783889Reports and notices
Feb 2025391848Verified or annual reports
Mar 2025200217219Verified or annual reports
Apr 2025105316124Reports and notices
May 2025293432329Verified or annual reports
Jun 2025760884Verified or annual reports
Jul 20252371212261Reports and notices
Aug 2025802587Verified or annual reports
Sep 2025192012204Verified or annual reports
Oct 2025211016227Verified or annual reports
Nov 2025892899Reports and notices
Dec 2025740781Reports and notices
Jan 2026122115Reports and notices
Feb 2026131216Reports and notices
Mar 2026120420144Reports and notices
Apr 2026852390Reports and notices
May 2026713579Reports and notices
Jun 202615537165Reports and notices
Jul 2026314326343Reports and notices
Aug 202610319113Reports and notices
Sep 2026153212167Reports and notices
Oct 2026740882Reports and notices
Nov 20260000

Hours under advisory per month

Hours at least one water in the state was 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 2022-04. 356 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. 26 events reported to last more than 31 days are counted to 31 days. Official beach and cyanobacteria advisories are counted on water pages only. EPA ECHO sewer overflow records are sparse (only what permittees file with EPA). MassDEP portal records begin 2022-06-30. Verified Data Reports arrive after the month ends, so the latest months count public notices.

Sources: EPA ECHO sewer overflow events; MassDEP sewage notification portal. Covered 2022-05-03 to 2026-11-02.

Show table
Hours under advisory per month
MonthHours under advisoryFrom discharge windowsHours in monthCoverage
Jan 202200744No source
Feb 202200672No source
Mar 202200744No source
Apr 202200720No source
May 202200744Partly covered or sparse source
Jun 202200720Partly covered or sparse source
Jul 2022536536744
Aug 2022433433744
Sep 2022561561720
Oct 2022469469744
Nov 2022426426720
Dec 2022437437744
Jan 2023616616744
Feb 2023450450672
Mar 2023639639744
Apr 2023364364720
May 2023544544744
Jun 2023606606720
Jul 2023728728744
Aug 2023581581744
Sep 2023686686720
Oct 2023567567744
Nov 2023442442720
Dec 2023635635744
Jan 2024744744744
Feb 2024580580696
Mar 2024744744744
Apr 2024720720720
May 2024744744744
Jun 2024514514720
Jul 2024614614744
Aug 2024534534744
Sep 2024318318720
Oct 2024252252744
Nov 2024262262720
Dec 2024424424744
Jan 2025295295744
Feb 2025418418672
Mar 2025483483744
Apr 2025536536720
May 2025575575744
Jun 2025295295720
Jul 2025631631744
Aug 2025467467744
Sep 2025351351720
Oct 2025360360744
Nov 2025365365720
Dec 2025320320744
Jan 2026176176744
Feb 2026237237672
Mar 2026729729744
Apr 2026429429720
May 2026608608744
Jun 2026514514720
Jul 2026523523744
Aug 2026447447744
Sep 2026520520720
Oct 2026259259744
Nov 20260032

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 2022-04.

Sources: EPA ECHO sewer overflow events; MassDEP sewage notification portal. Covered 2022-05-03 to 2026-11-02.

Show table
Days with a discharge per month
MonthDays with a dischargeCoverage
Jan 20220No source
Feb 20220No source
Mar 20220No source
Apr 20220No source
May 20220Partly covered or sparse source
Jun 20221Partly covered or sparse source
Jul 202214
Aug 202213
Sep 202216
Oct 202214
Nov 202213
Dec 202211
Jan 202321
Feb 202311
Mar 202322
Apr 202311
May 202316
Jun 202321
Jul 202327
Aug 202321
Sep 202326
Oct 202318
Nov 20239
Dec 202325
Jan 202431
Feb 202412
Mar 202429
Apr 202421
May 202417
Jun 202415
Jul 202417
Aug 202415
Sep 202410
Oct 20245
Nov 20246
Dec 202412
Jan 20259
Feb 202512
Mar 202513
Apr 202516
May 202519
Jun 20256
Jul 202520
Aug 202511
Sep 202510
Oct 202512
Nov 202511
Dec 20259
Jan 20266
Feb 20269
Mar 202631
Apr 202611
May 202619
Jun 202617
Jul 202618
Aug 202613
Sep 202616
Oct 20265
Nov 20260

Reported volume per year

Gallons, summed from the 9,960 events that gave a number (372 did not).

  • Partly covered or sparse source
Sparse source

372 of 10,332 events gave no volume as a number; only numbers are summed.

Sources: EPA ECHO sewer overflow events; MassDEP sewage notification portal. Covered 2022-05-03 to 2026-11-02.

Show table
Reported volume per year
YearGallonsEvents with a numberEvents withoutCoverage
20221,439,934,9221,3618Partly covered or sparse source
20237,245,048,6243,37443
20247,667,916,9512,40476
20253,070,988,5411,83814
20262,249,002,668983231

Hours under advisory per year

Hours under advisory each year; 2026 to date.

  • Advisory in effect
  • Partly covered or sparse source
Sparse source

356 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. 26 events reported to last more than 31 days are counted to 31 days. Official beach and cyanobacteria advisories are counted on water pages only.

Sources: EPA ECHO sewer overflow events; MassDEP sewage notification portal. Covered 2022-05-03 to 2026-11-02.

Show table
Hours under advisory per year
YearHours under advisoryShare of the yearCoverage
20222,86132.7%Partly covered or sparse source
20236,85778.3%
20246,44973.4%
20255,09658.2%
20264,44360.6%

Share of the May to October season under advisory

Share of the hours from May 1 to October 31 with an advisory in effect.

  • Advisory in effect
  • Season partly covered

Seasons only partly covered by a source: 2022 (share is of the covered hours). 356 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. 26 events reported to last more than 31 days are counted to 31 days. Official beach and cyanobacteria advisories are counted on water pages only.

Sources: EPA ECHO sewer overflow events; MassDEP sewage notification portal. Covered 2022-05-03 to 2026-11-02.

Show table
Share of the May to October season under advisory
SeasonShare under advisoryHours under advisoryHours coveredSeason hoursPartly covered
202267.6%1,9982,9584,416yes
202384.1%3,7124,4164,416
202467.4%2,9764,4164,416
202560.7%2,6794,4164,416
202665.0%2,8714,4164,416

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.

Sources: EPA ECHO sewer overflow events; MassDEP sewage notification portal. Covered 2022-05-03 to 2026-11-02.

Show table
Discharge events by calendar month, all years
MonthEventsYears of records
Jan7954
Feb1714
Mar9484
Apr6334
May8604
Jun9175
Jul1,7845
Aug1,0705
Sep1,1475
Oct7155
Nov4555
Dec8374

Discharge events by outfall

The 10 outfalls with the most events of 196, all years.

EPA ECHO sewer overflow records are sparse (only what permittees file with EPA). MassDEP portal records begin 2022-06-30. Verified Data Reports arrive after the month ends, so the latest months count public notices.

Sources: EPA ECHO sewer overflow events; MassDEP sewage notification portal. Covered 2022-05-03 to 2026-11-02.

Show table
Discharge events by outfall
OutfallDischargerEvents
NEW003 COVE RD & PADNARAM AVECITY OF NEW BEDFORD341
NEW023 COFFIN AVECITY OF NEW BEDFORD320
FAL011 PRESIDENT AVECITY OF FALL RIVER307
FAL010 CITY PIERCITY OF FALL RIVER300
FAL013 COVE STCITY OF FALL RIVER282
HOL018 WALNUT ST.CITY OF HOLYOKE246
HOL020 CLEVELAND ST.CITY OF HOLYOKE212
001CITY OF FALL RIVER206
NEW035 MAXFIELD ST AT BUZZARDS BAYCITY OF NEW BEDFORD197
NEW031 CONWAY ST AT BUZZARDS BAYCITY OF NEW BEDFORD193
Other outfalls (186)7,486
Outfall not stated242

Reported monthly totals: EPA ECHO discharge monitoring reports (monthly CSO totals)

Monthly totals each permittee files with EPA per outfall (discharge monitoring reports). They describe the same discharges the state notices report, so they are shown here and never added to the event counts. A month with no row counts as zero inside the span. Sum of 3 reporting dischargers. Source: EPA ECHO discharge monitoring reports (monthly CSO totals). Covered 2024-01-01 to 2026-09-30.

Reported volume

Gallons per month.

Show table
Reported volume
MonthReported volume
Jan 202421,701,382 gal
Feb 2024296,492 gal
Mar 202425,910,034 gal
Apr 20245,729,401 gal
May 20248,845,826 gal
Jun 202418,552,246 gal
Jul 20245,548,607 gal
Aug 20242,956,033 gal
Sep 2024241,078 gal
Oct 202423,494 gal
Nov 20242,205,060 gal
Dec 20244,939,120 gal
Jan 20252,060,954 gal
Feb 20251,114,238 gal
Mar 202510,390,092 gal
Apr 20252,066,419 gal
May 202520,389,027 gal
Jun 20253,379,758 gal
Jul 202510,766,776 gal
Aug 20256,334,723 gal
Sep 20257,540,281 gal
Oct 20258,630,938 gal
Nov 20251,892,514 gal
Dec 20253,178,481 gal
Jan 2026320,838 gal
Feb 202626,778 gal
Mar 202612,151,133 gal
Apr 20261,417,588 gal
May 20262,538,313 gal
Jun 20264,553,500 gal
Jul 202610,869,647 gal
Aug 20265,922,611 gal
Sep 20262,623,143 gal

Discharge events reported

Events per month.

Show table
Discharge events reported
MonthDischarge events reported
Jan 2024127
Feb 202433
Mar 2024167
Apr 202495
May 2024133
Jun 2024197
Jul 2024116
Aug 2024129
Sep 202435
Oct 20248
Nov 202445
Dec 202497
Jan 202543
Feb 202545
Mar 2025119
Apr 202590
May 2025223
Jun 202590
Jul 2025189
Aug 202542
Sep 2025116
Oct 2025114
Nov 202552
Dec 202552
Jan 20269
Feb 20269
Mar 202692
Apr 202693
May 202657
Jun 2026113
Jul 2026197
Aug 2026101
Sep 202680

Hours of discharge reported

Hours per month.

Show table
Hours of discharge reported
MonthHours of discharge reported
Jan 2024532 h
Feb 202461 h
Mar 2024749 h
Apr 2024309 h
May 2024192 h
Jun 2024258 h
Jul 2024135 h
Aug 2024122 h
Sep 202413 h
Oct 20240 h
Nov 202466 h
Dec 2024148 h
Jan 202552 h
Feb 202537 h
Mar 2025208 h
Apr 202590 h
May 2025864 h
Jun 202559 h
Jul 2025235 h
Aug 202553 h
Sep 2025222 h
Oct 2025322 h
Nov 202562 h
Dec 202571 h
Jan 202614 h
Feb 20263 h
Mar 2026716 h
Apr 2026116 h
May 2026107 h
Jun 2026175 h
Jul 2026387 h
Aug 2026223 h
Sep 2026114 h
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.

  • EPA ECHO sewer overflow events: 2022-05-03 to now (sparse)
  • MassDEP sewage notification portal: 2022-06-30 to now

Discharges in the last 30 days

Discharges in Massachusetts in the last 30 days, newest first
StartEnd Water Discharger OutfallTypeVolumeSourceLinks
Oct 17, 2026, 8:00 AM EDT ended, time not reported Clarks Cove, MA CITY OF NEW BEDFORD NEW003 COVE RD & PADNARAM AVE Combined sewer overflow not reported CITY OF NEW BEDFORD (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record c52a1a86-29c6-462f-9e86-25539c6089ce, published Oct 17, 2026, 1:02 PM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF NEW BEDFORD, Oct 17, 2026, 8:00 AM EDT · Map
Oct 16, 2026, 6:55 PM EDT ended, time not reported Connecticut River, MA SPRINGFIELD WATER & SEWER COMMISSION SPR016 YORK ST. Combined sewer overflow not reported SPRINGFIELD WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 4d712e65-4444-4861-a31a-c1eb7b6110fe, published Oct 19, 2026, 8:43 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, SPRINGFIELD WATER & SEWER COMMISSION, Oct 16, 2026, 6:55 PM EDT · Map
Oct 16, 2026, 6:50 PM EDT ended, time not reported “MILL R.” (not placed) SPRINGFIELD WATER & SEWER COMMISSION SPR045 FORT PLEASANT AVE. Combined sewer overflow not reported SPRINGFIELD WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 0c02dc0c-e337-4310-9e36-70e2a1cbce7e, published Oct 19, 2026, 8:45 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, SPRINGFIELD WATER & SEWER COMMISSION, Oct 16, 2026, 6:50 PM EDT · Map
Oct 16, 2026, 6:50 PM EDT ended, time not reported Connecticut River, MA SPRINGFIELD WATER & SEWER COMMISSION SPR014 ELM ST. Combined sewer overflow not reported SPRINGFIELD WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 8ae07334-6731-486d-ae7a-1b3737f23f45, published Oct 19, 2026, 8:44 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, SPRINGFIELD WATER & SEWER COMMISSION, Oct 16, 2026, 6:50 PM EDT · Map
Oct 16, 2026, 6:50 PM EDT ended, time not reported Connecticut River, MA SPRINGFIELD WATER & SEWER COMMISSION SPR042 SPRINGFIELD WWTP BYPASS AT BONDI'S ISLAND Combined sewer overflow not reported SPRINGFIELD WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 1f3939b3-ee0b-47da-b0a9-6779f0ce1aab, published Oct 19, 2026, 8:42 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, SPRINGFIELD WATER & SEWER COMMISSION, Oct 16, 2026, 6:50 PM EDT · Map
Oct 16, 2026, 6:45 PM EDT ended, time not reported Lake Massasoit, MA SPRINGFIELD WATER & SEWER COMMISSION SPR025 ALLEN & OAKLAND STS. Combined sewer overflow not reported SPRINGFIELD WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 788b492a-cd0d-42b6-bf80-1b8598f0bbe9, published Oct 19, 2026, 8:41 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, SPRINGFIELD WATER & SEWER COMMISSION, Oct 16, 2026, 6:45 PM EDT · Map
Oct 16, 2026, 6:40 PM EDT ended, time not reported “MILL R.” (not placed) SPRINGFIELD WATER & SEWER COMMISSION SPR046 BELMONT ST. Combined sewer overflow not reported SPRINGFIELD WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 548f9528-5305-4589-aa0f-32e1e49affde, published Oct 19, 2026, 8:41 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, SPRINGFIELD WATER & SEWER COMMISSION, Oct 16, 2026, 6:40 PM EDT · Map
Oct 16, 2026, 6:35 PM EDT ended, time not reported “LITTLE RIVER” (not placed) CITY OF HAVERHILL HAV021F LOCKE STREET CENTER BARRELL Combined sewer overflow not reported CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 46f79e59-9281-469f-95d6-cb85affb2e7b, published Oct 19, 2026, 7:18 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF HAVERHILL, Oct 16, 2026, 6:35 PM EDT · Map
Oct 16, 2026, 11:05 AM EDT ended, time not reported Merrimack River, MA LOWELL REGIONAL WASTEWATER UTILITY 035 Blended (partially treated) discharge not reported LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record d890d770-5ba3-4e0d-8602-c861dae1c051, published Oct 16, 2026, 2:04 PM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Blended (partially treated) discharge, LOWELL REGIONAL WASTEWATER UTILITY, Oct 16, 2026, 11:05 AM EDT · Map
Oct 16, 2026, 11:00 AM EDT ended, time not reported New Bedford Harbor, MA CITY OF NEW BEDFORD NEW031 CONWAY ST AT BUZZARDS BAY Combined sewer overflow not reported CITY OF NEW BEDFORD (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 04dd9614-e87e-4ea1-8229-3d2289686ee9, published Oct 16, 2026, 1:26 PM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF NEW BEDFORD, Oct 16, 2026, 11:00 AM EDT · Map
Oct 16, 2026, 10:20 AM EDT ended, time not reported Clarks Cove, MA CITY OF NEW BEDFORD NEW003 COVE RD & PADNARAM AVE Combined sewer overflow not reported CITY OF NEW BEDFORD (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 4cea4edc-b8a7-4f2a-bc10-7db76fcdffc6, published Oct 16, 2026, 1:27 PM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF NEW BEDFORD, Oct 16, 2026, 10:20 AM EDT · Map
Oct 16, 2026, 10:05 AM EDT ended, time not reported Acushnet River, MA CITY OF NEW BEDFORD NEW023 COFFIN AVE Combined sewer overflow not reported CITY OF NEW BEDFORD (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 2cd96f1a-a266-47a4-be6b-01173a236797, published Oct 16, 2026, 1:28 PM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF NEW BEDFORD, Oct 16, 2026, 10:05 AM EDT · Map
Oct 16, 2026, 9:25 AM EDT ended, time not reported Connecticut River, MA SPRINGFIELD WATER & SEWER COMMISSION SPR010 CLINTON ST. Combined sewer overflow not reported SPRINGFIELD WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 7763feb9-d8d6-464e-93d1-9dddfeaef94e, published Oct 19, 2026, 8:36 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, SPRINGFIELD WATER & SEWER COMMISSION, Oct 16, 2026, 9:25 AM EDT · Map
Oct 16, 2026, 9:20 AM EDT ended, time not reported Connecticut River, MA SPRINGFIELD WATER & SEWER COMMISSION SPR012 WORTHINGTON ST. Combined sewer overflow not reported SPRINGFIELD WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record b8f17ceb-2f5c-4983-b19f-2bf55f2cca83, published Oct 19, 2026, 8:37 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, SPRINGFIELD WATER & SEWER COMMISSION, Oct 16, 2026, 9:20 AM EDT · Map
Oct 16, 2026, 8:30 AM EDT ended, time not reported Connecticut River, MA CITY OF HOLYOKE HOL09 BERKSHIRE ST. Combined sewer overflow not reported CITY OF HOLYOKE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record ea8906b2-6869-4463-a9e7-795e827e826e, published Oct 19, 2026, 8:30 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF HOLYOKE, Oct 16, 2026, 8:30 AM EDT · Map
Oct 16, 2026, 7:10 AM EDT ended, time not reported Connecticut River, MA CITY OF HOLYOKE HOL08 SPRINGDALE PARK Combined sewer overflow not reported CITY OF HOLYOKE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 1b0d9fb0-111b-49e6-9b23-ada7b2e17e48, published Oct 19, 2026, 8:29 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF HOLYOKE, Oct 16, 2026, 7:10 AM EDT · Map
Oct 16, 2026, 7:10 AM EDT ended, time not reported Connecticut River, MA CITY OF HOLYOKE HOL018 WALNUT ST. Combined sewer overflow not reported CITY OF HOLYOKE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record a8bf4ded-7af5-426a-baf1-7cf5498393a5, published Oct 19, 2026, 8:26 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF HOLYOKE, Oct 16, 2026, 7:10 AM EDT · Map
Oct 14, 2026, 11:35 PM EDT ended, time not reported Saugus River, MA LYNN WATER & SEWER COMMISSION LYNN003 SUMMER STREET@SAUGUS RIVER Combined sewer overflow not reported LYNN WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record b7bb51ee-8c82-479f-ba48-40a93ddbabf0, published Oct 14, 2026, 8:42 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, LYNN WATER & SEWER COMMISSION, Oct 14, 2026, 11:35 PM EDT · Map
Oct 14, 2026, 11:20 PM EDT ended, time not reported Lynn Harbor, MA LYNN WATER & SEWER COMMISSION LYNN004 NW BANK OF BROAD SOUND @254 LYNWAY@PLEASANT ST Combined sewer overflow not reported LYNN WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 931c6f7c-2f99-41d5-a0da-0d0c1c6cf817, published Oct 14, 2026, 8:41 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, LYNN WATER & SEWER COMMISSION, Oct 14, 2026, 11:20 PM EDT · Map
Oct 14, 2026, 11:20 PM EDT ended, time not reported Lynn Harbor, MA LYNN WATER & SEWER COMMISSION LYNN005 180 LYNNWAY Combined sewer overflow not reported LYNN WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 14116cb1-06be-4969-94ba-122e7b2de4f7, published Oct 14, 2026, 8:40 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, LYNN WATER & SEWER COMMISSION, Oct 14, 2026, 11:20 PM EDT · Map
Oct 12, 2026, 2:54 AM EDT Oct 12, 2026, 7:36 AM EDT Massachusetts Bay, MA Massachusetts Water Resources Authority not stated Bypass 21.55 million gal EPA ECHO Sewer Overflow and Bypass Event report (reported to regulators) via ECHO NPDES Sewer Overflow and Bypass Event Dataset (eRule Phase 2, current versions), record MA0103284:5:2, reported Oct 12, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Bypass, Massachusetts Water Resources Authority, Oct 12, 2026, 2:54 AM EDT · Map
Oct 12, 2026, 2:27 AM EDT Oct 12, 2026, 2:42 AM EDT Massachusetts Bay, MA Massachusetts Water Resources Authority not stated Bypass 560,000 gal EPA ECHO Sewer Overflow and Bypass Event report (reported to regulators) via ECHO NPDES Sewer Overflow and Bypass Event Dataset (eRule Phase 2, current versions), record MA0103284:5:1, reported Oct 12, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Bypass, Massachusetts Water Resources Authority, Oct 12, 2026, 2:27 AM EDT · Map
Oct 12, 2026, 12:15 AM EDT ended, time not reported Clarks Cove, MA CITY OF NEW BEDFORD NEW008 CALUMET ST & RFB Combined sewer overflow not reported CITY OF NEW BEDFORD (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record bef1c5d4-662c-45cf-a5d4-6dbd538967bd, published Oct 12, 2026, 7:56 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF NEW BEDFORD, Oct 12, 2026, 12:15 AM EDT · Map
Oct 11, 2026, 11:34 PM EDT ended, time not reported Taunton River, MA CITY OF FALL RIVER FAL010 CITY PIER Combined sewer overflow not reported CITY OF FALL RIVER (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 39096d80-5d78-4d16-8239-e893b352d293, published Oct 12, 2026, 7:34 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF FALL RIVER, Oct 11, 2026, 11:34 PM EDT · Map
Oct 11, 2026, 11:12 PM EDT ended, time not reported Merrimack River, MA LOWELL REGIONAL WASTEWATER UTILITY LOW008 WEST STREET Combined sewer overflow not reported LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record dd96a2df-46b0-4fa4-951d-ff19be610e0e, published Oct 12, 2026, 5:59 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Oct 11, 2026, 11:12 PM EDT · Map
Oct 11, 2026, 11:02 PM EDT ended, time not reported Mystic River, MA CITY OF SOMERVILLE SOM007A/MWR205A SOUTH BANK OF MYSTIC RIVER AT INT OF ASSEMBLY SQ DR & 28 Combined sewer overflow not reported CITY OF SOMERVILLE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 9f9cd5fd-1531-474f-bf92-62ae79451d8b, published Oct 12, 2026, 12:06 PM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF SOMERVILLE, Oct 11, 2026, 11:02 PM EDT · Map
Oct 11, 2026, 11:00 PM EDT ended, time not reported Merrimack River, MA LOWELL REGIONAL WASTEWATER UTILITY LOW030-1 BARASFORD AVE Combined sewer overflow not reported LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 427c64d3-cd52-4961-8be1-00a71470e81e, published Oct 12, 2026, 5:48 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Oct 11, 2026, 11:00 PM EDT · Map
Oct 11, 2026, 10:55 PM EDT ended, time not reported Merrimack River, MA CITY OF HAVERHILL HAV021A MIDDLE SIPHON ESSEX ST Combined sewer overflow not reported CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 9889fa84-3ee5-483b-88f6-622b1463807f, published Oct 13, 2026, 7:14 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF HAVERHILL, Oct 11, 2026, 10:55 PM EDT · Map
Oct 11, 2026, 10:50 PM EDT ended, time not reported “FORT POINT CHANNEL” (not placed) BOSTON WATER & SEWER COMMISSION 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
Oct 11, 2026, 10:30 PM EDT ended, time not reported “CHELSEA RIVER” (not placed) CITY OF CHELSEA CHE008 NORTHERN EDGE OF GULF BULK OIL STORAGE Combined sewer overflow not reported CITY OF CHELSEA (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record fd704e2d-0bdc-4490-9808-15037e5e0766, published Oct 20, 2026, 6:34 PM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF CHELSEA, Oct 11, 2026, 10:30 PM EDT · Map
Oct 11, 2026, 10:05 PM EDT ended, time not reported “LITTLE RIVER” (not placed) CITY OF HAVERHILL HAV021F LOCKE STREET CENTER BARRELL Combined sewer overflow not reported CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 7951c12a-aaf9-4f09-ac8f-66bf70dea302, published Oct 13, 2026, 7:13 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF HAVERHILL, Oct 11, 2026, 10:05 PM EDT · Map
Oct 11, 2026, 9:57 PM EDT ended, time not reported Merrimack River, MA LOWELL REGIONAL WASTEWATER UTILITY LOW030-2 MERRIMACK STATION Combined sewer overflow not reported LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 41c6dc16-b968-44ba-940a-6d1b09380903, published Oct 12, 2026, 5:45 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, LOWELL REGIONAL WASTEWATER UTILITY, Oct 11, 2026, 9:57 PM EDT · Map
Oct 11, 2026, 9:54 PM EDT ended, time not reported Massachusetts Bay, MA MASSACHUSETTS WATER RESOURCES AUTHORITY T01 Blended (partially treated) discharge not reported MASSACHUSETTS WATER RESOURCES AUTHORITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record cc473526-3969-4bab-8435-536ad07c817d, published Oct 12, 2026, 12:14 PM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Blended (partially treated) discharge, MASSACHUSETTS WATER RESOURCES AUTHORITY, Oct 11, 2026, 9:54 PM EDT · Map
Oct 11, 2026, 9:30 PM EDT Oct 11, 2026, 10:15 PM EDT “CHELSEA RIVER” (not placed) CITY OF CHELSEA CHE008 NORTHERN EDGE OF GULF BULK OIL STORAGE Combined sewer overflow 48,091 gal CITY OF CHELSEA (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 335f9ae5-d8af-48b7-94ef-ffa733ff03fe, published Oct 20, 2026, 6:43 PM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF CHELSEA, Oct 11, 2026, 9:30 PM EDT · Map
Oct 11, 2026, 9:27 PM EDT ended, time not reported Massachusetts Bay, MA MASSACHUSETTS WATER RESOURCES AUTHORITY T01 Blended (partially treated) discharge not reported MASSACHUSETTS WATER RESOURCES AUTHORITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 291e1a76-2ed7-4a95-b9c2-566a5fcb7f22, published Oct 12, 2026, 12:10 PM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Blended (partially treated) discharge, MASSACHUSETTS WATER RESOURCES AUTHORITY, Oct 11, 2026, 9:27 PM EDT · Map
Oct 11, 2026, 9:26 PM EDT ended, time not reported Charles River, MA MASSACHUSETTS WATER RESOURCES AUTHORITY MWR203 JUST NORTH OF LOCKS AT CHARLSTOWN BRIDGE Combined sewer overflow not reported MASSACHUSETTS WATER RESOURCES AUTHORITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 77759ea4-6d4f-4b98-8751-7969067b09c4, published Oct 12, 2026, 12:03 PM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, MASSACHUSETTS WATER RESOURCES AUTHORITY, Oct 11, 2026, 9:26 PM EDT · Map
Oct 11, 2026, 8:45 PM EDT ended, time not reported Merrimack River, MA CITY OF HAVERHILL HAV034 MIDDLESEX STREET Combined sewer overflow not reported CITY OF HAVERHILL (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 1bbad740-a773-4575-905a-d784c483df4f, published Oct 13, 2026, 7:12 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF HAVERHILL, Oct 11, 2026, 8:45 PM EDT · Map
Oct 11, 2026, 8:25 PM EDT ended, time not reported “CHELSEA RIVER” (not placed) CITY OF CHELSEA CHE008 NORTHERN EDGE OF GULF BULK OIL STORAGE Combined sewer overflow not reported CITY OF CHELSEA (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 58715ee5-5c6b-4be2-8223-1bbc235b3fa2, published Oct 20, 2026, 6:33 PM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF CHELSEA, Oct 11, 2026, 8:25 PM EDT · Map
Oct 11, 2026, 8:25 PM EDT ended, time not reported Clarks Cove, MA CITY OF NEW BEDFORD NEW006 LUCAS STREET & RFB Combined sewer overflow not reported CITY OF NEW BEDFORD (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record cb573edf-1328-47b1-a6bb-8a7f6d47434a, published Oct 11, 2026, 10:52 PM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF NEW BEDFORD, Oct 11, 2026, 8:25 PM EDT · Map
Oct 11, 2026, 8:00 PM EDT ended, time not reported Mystic River, MA MASSACHUSETTS WATER RESOURCES AUTHORITY MWR205 EAST BNK MYSTIC 150 FT SW OF MDC LOCKS Combined sewer overflow not reported MASSACHUSETTS WATER RESOURCES AUTHORITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record e716b9d4-05cd-416d-b1bd-264f613ff14f, published Oct 12, 2026, 11:58 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, MASSACHUSETTS WATER RESOURCES AUTHORITY, Oct 11, 2026, 8:00 PM EDT · Map
Oct 11, 2026, 7:57 PM EDT ended, time not reported “ALEWIFE BROOK” (not placed) CITY OF CAMBRIDGE CAM401A MBTA 97 CAMBRIDGE PARK DR Combined sewer overflow not reported CITY OF CAMBRIDGE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record b8897e69-76ab-43f4-85a6-37caf45a316f, published Oct 13, 2026, 10:10 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF CAMBRIDGE, Oct 11, 2026, 7:57 PM EDT · Map
Oct 11, 2026, 7:55 PM EDT ended, time not reported Saugus River, MA LYNN WATER & SEWER COMMISSION LYNN003 SUMMER STREET@SAUGUS RIVER Combined sewer overflow not reported LYNN WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 06b1ff6c-c39c-483a-a60d-8d95da0630f3, published Oct 12, 2026, 9:14 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, LYNN WATER & SEWER COMMISSION, Oct 11, 2026, 7:55 PM EDT · Map
Oct 11, 2026, 7:50 PM EDT ended, time not reported Lynn Harbor, MA LYNN WATER & SEWER COMMISSION LYNN004 NW BANK OF BROAD SOUND @254 LYNWAY@PLEASANT ST Combined sewer overflow not reported LYNN WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 031f2680-95f7-41f6-adf2-e3809218c1f3, published Oct 12, 2026, 9:13 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, LYNN WATER & SEWER COMMISSION, Oct 11, 2026, 7:50 PM EDT · Map
Oct 11, 2026, 7:50 PM EDT ended, time not reported Lynn Harbor, MA LYNN WATER & SEWER COMMISSION LYNN005 180 LYNNWAY Combined sewer overflow not reported LYNN WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 78dd2358-1eba-4589-8cb5-a29681a50da3, published Oct 12, 2026, 9:12 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, LYNN WATER & SEWER COMMISSION, Oct 11, 2026, 7:50 PM EDT · Map
Oct 11, 2026, 7:30 PM EDT ended, time not reported New Bedford Harbor, MA CITY OF NEW BEDFORD NEW017 DAVID ST & RFB Combined sewer overflow not reported CITY OF NEW BEDFORD (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record ddd928a8-ee2d-4ec0-9aac-275e24fa36d8, published Oct 11, 2026, 10:51 PM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF NEW BEDFORD, Oct 11, 2026, 7:30 PM EDT · Map
Oct 11, 2026, 7:25 PM EDT ended, time not reported Clarks Cove, MA CITY OF NEW BEDFORD NEW005 DUDLEY & RFB Combined sewer overflow not reported CITY OF NEW BEDFORD (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 8362b422-5f67-49a8-b18a-b0131d684d26, published Oct 11, 2026, 10:49 PM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF NEW BEDFORD, Oct 11, 2026, 7:25 PM EDT · Map
Oct 11, 2026, 7:17 PM EDT ongoing (as reported) Blackstone River, MA CITY OF WORCESTER WOR001 QUINSIGAMOND AVENUE Combined sewer overflow not reported CITY OF WORCESTER (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record e8a33adf-dc65-4073-92dd-46fb5d727997, published Oct 11, 2026, 8:23 PM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF WORCESTER, Oct 11, 2026, 7:17 PM EDT · Map
Oct 11, 2026, 7:07 PM EDT ended, time not reported Taunton River, MA CITY OF FALL RIVER FAL008 FERRY ST Combined sewer overflow not reported CITY OF FALL RIVER (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record accea0c7-d940-450d-84ca-c4af0e885928, published Oct 12, 2026, 7:31 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF FALL RIVER, Oct 11, 2026, 7:07 PM EDT · Map
Oct 11, 2026, 6:55 PM EDT ended, time not reported Connecticut River, MA SPRINGFIELD WATER & SEWER COMMISSION SPR010 CLINTON ST. Combined sewer overflow not reported SPRINGFIELD WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 676a2170-d729-4770-8109-e90e77e7dbe5, published Oct 12, 2026, 9:21 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, SPRINGFIELD WATER & SEWER COMMISSION, Oct 11, 2026, 6:55 PM EDT · Map
Oct 11, 2026, 6:50 PM EDT ended, time not reported New Bedford Harbor, MA CITY OF NEW BEDFORD NEW018 COVE ST AND E. RODNEY FRENCH BLVD Combined sewer overflow not reported CITY OF NEW BEDFORD (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 224ce40f-4fd9-4ce6-932c-40faee4a55d4, published Oct 11, 2026, 10:47 PM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF NEW BEDFORD, Oct 11, 2026, 6:50 PM EDT · Map
Oct 11, 2026, 6:45 PM EDT Oct 11, 2026, 8:10 PM EDT “CHELSEA RIVER” (not placed) CITY OF CHELSEA CHE008 NORTHERN EDGE OF GULF BULK OIL STORAGE Combined sewer overflow 48,092 gal CITY OF CHELSEA (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 91d53ba4-45b8-4e6a-b46b-f1a0276f1709, published Oct 20, 2026, 6:40 PM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF CHELSEA, Oct 11, 2026, 6:45 PM EDT · Map
Oct 11, 2026, 6:36 PM EDT ended, time not reported Narragansett Bay, MA CITY OF FALL RIVER 001 Blended (partially treated) discharge not reported CITY OF FALL RIVER (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record d51a651f-7c72-420b-a001-6a5a232334c1, published Oct 12, 2026, 7:29 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Blended (partially treated) discharge, CITY OF FALL RIVER, Oct 11, 2026, 6:36 PM EDT · Map
Oct 11, 2026, 6:20 PM EDT ended, time not reported Connecticut River, MA SPRINGFIELD WATER & SEWER COMMISSION SPR008 WASHBURN ST. Combined sewer overflow not reported SPRINGFIELD WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 9f498d10-a7f3-49d8-91b8-4a59d9b614c4, published Oct 12, 2026, 9:17 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, SPRINGFIELD WATER & SEWER COMMISSION, Oct 11, 2026, 6:20 PM EDT · Map
Oct 11, 2026, 6:20 PM EDT ended, time not reported New Bedford Harbor, MA CITY OF NEW BEDFORD NEW031 CONWAY ST AT BUZZARDS BAY Combined sewer overflow not reported CITY OF NEW BEDFORD (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 29714bf8-4484-4f46-8c65-527afc336095, published Oct 11, 2026, 10:45 PM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF NEW BEDFORD, Oct 11, 2026, 6:20 PM EDT · Map
Oct 11, 2026, 6:15 PM EDT ended, time not reported Connecticut River, MA CITY OF HOLYOKE HOL07 NORTHAMPTON ST/GLEN ST. Combined sewer overflow not reported CITY OF HOLYOKE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 535d32d8-b4ab-4455-b504-0d5524a3eb65, published Oct 13, 2026, 8:10 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF HOLYOKE, Oct 11, 2026, 6:15 PM EDT · Map
Oct 11, 2026, 6:14 PM EDT ended, time not reported Taunton River, MA CITY OF FALL RIVER FAL011 PRESIDENT AVE Combined sewer overflow not reported CITY OF FALL RIVER (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 904ce9b3-f235-4304-9d73-e8a0ec6de480, published Oct 12, 2026, 7:22 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF FALL RIVER, Oct 11, 2026, 6:14 PM EDT · Map
Oct 11, 2026, 6:13 PM EDT ended, time not reported Taunton River, MA CITY OF FALL RIVER FAL013 COVE ST Combined sewer overflow not reported CITY OF FALL RIVER (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 73681c46-3baa-4fc8-a779-da3f1d9b6477, published Oct 12, 2026, 7:27 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF FALL RIVER, Oct 11, 2026, 6:13 PM EDT · Map
Oct 11, 2026, 6:10 PM EDT ended, time not reported Chicopee River, MA SPRINGFIELD WATER & SEWER COMMISSION SPR034 MAIN ST. Combined sewer overflow not reported SPRINGFIELD WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record b3e45436-6c03-4743-a0ed-ec4616959650, published Oct 12, 2026, 9:19 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, SPRINGFIELD WATER & SEWER COMMISSION, Oct 11, 2026, 6:10 PM EDT · Map
Oct 11, 2026, 6:06 PM EDT ended, time not reported Taunton River, MA CITY OF FALL RIVER FAL014 Alton St. Combined sewer overflow not reported CITY OF FALL RIVER (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 98ae6fc9-82fb-4c96-80e8-238a58eed6c1, published Oct 12, 2026, 7:25 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF FALL RIVER, Oct 11, 2026, 6:06 PM EDT · Map
Oct 11, 2026, 6:05 PM EDT ended, time not reported Lake Massasoit, MA SPRINGFIELD WATER & SEWER COMMISSION SPR025 ALLEN & OAKLAND STS. Combined sewer overflow not reported SPRINGFIELD WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record ab2a58a3-8c8a-42c0-9018-5fde1a0fa941, published Oct 12, 2026, 9:16 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, SPRINGFIELD WATER & SEWER COMMISSION, Oct 11, 2026, 6:05 PM EDT · Map
Oct 11, 2026, 6:00 PM EDT ended, time not reported Connecticut River, MA SPRINGFIELD WATER & SEWER COMMISSION SPR015B UNION ST. Combined sewer overflow not reported SPRINGFIELD WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 147ca797-9adf-4294-abef-d5d0a5f21ba8, published Oct 12, 2026, 9:45 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, SPRINGFIELD WATER & SEWER COMMISSION, Oct 11, 2026, 6:00 PM EDT · Map
Oct 11, 2026, 6:00 PM EDT ended, time not reported Acushnet River, MA CITY OF NEW BEDFORD NEW027 MILL RD AT ACUSHNET RIVER Combined sewer overflow not reported CITY OF NEW BEDFORD (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record dc9e85a1-0bfe-408e-b5cc-8d3b4d26a823, published Oct 11, 2026, 10:44 PM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF NEW BEDFORD, Oct 11, 2026, 6:00 PM EDT · Map
Oct 11, 2026, 5:55 PM EDT ended, time not reported Connecticut River, MA CITY OF HOLYOKE HOL021 RIVER TERRACE Combined sewer overflow not reported CITY OF HOLYOKE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 1137bebe-fc71-4d54-9d05-90189810481b, published Oct 13, 2026, 8:07 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF HOLYOKE, Oct 11, 2026, 5:55 PM EDT · Map
Oct 11, 2026, 5:50 PM EDT ended, time not reported Chicopee River, MA SPRINGFIELD WATER & SEWER COMMISSION SPR035 FRONT & OAK ST. Combined sewer overflow not reported SPRINGFIELD WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 32df199c-5b11-4024-8ee6-6390cdbb5a85, published Oct 12, 2026, 9:18 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, SPRINGFIELD WATER & SEWER COMMISSION, Oct 11, 2026, 5:50 PM EDT · Map
Oct 11, 2026, 5:40 PM EDT ended, time not reported Lake Massasoit, MA SPRINGFIELD WATER & SEWER COMMISSION SPR048 ALLEN & RIFLE STS. Combined sewer overflow not reported SPRINGFIELD WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 0753dc67-de3d-44ea-8001-8b608a524f74, published Oct 12, 2026, 9:14 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, SPRINGFIELD WATER & SEWER COMMISSION, Oct 11, 2026, 5:40 PM EDT · Map
Oct 11, 2026, 5:30 PM EDT ended, time not reported Connecticut River, MA CITY OF HOLYOKE HOL019 YALE ST. Combined sewer overflow not reported CITY OF HOLYOKE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 496ef276-19b0-4bdb-b8a9-0f8233f2875e, published Oct 13, 2026, 8:06 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF HOLYOKE, Oct 11, 2026, 5:30 PM EDT · Map
Oct 11, 2026, 5:30 PM EDT ended, time not reported “MILL R.” (not placed) SPRINGFIELD WATER & SEWER COMMISSION SPR045 FORT PLEASANT AVE. Combined sewer overflow not reported SPRINGFIELD WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 9661924b-0832-4939-a57b-2368407ed78a, published Oct 12, 2026, 9:13 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, SPRINGFIELD WATER & SEWER COMMISSION, Oct 11, 2026, 5:30 PM EDT · Map
Oct 11, 2026, 5:30 PM EDT ended, time not reported Connecticut River, MA SPRINGFIELD WATER & SEWER COMMISSION SPR049 SPRINGFIELD ST. Combined sewer overflow not reported SPRINGFIELD WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record bf1a88ce-34c7-4f37-bb72-d89a84e33985, published Oct 12, 2026, 9:11 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, SPRINGFIELD WATER & SEWER COMMISSION, Oct 11, 2026, 5:30 PM EDT · Map
Oct 11, 2026, 5:30 PM EDT ended, time not reported Connecticut River, MA SPRINGFIELD WATER & SEWER COMMISSION SPR012 WORTHINGTON ST. Combined sewer overflow not reported SPRINGFIELD WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record d7619765-7c42-4a8f-a16d-207f87c56be9, published Oct 12, 2026, 9:09 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, SPRINGFIELD WATER & SEWER COMMISSION, Oct 11, 2026, 5:30 PM EDT · Map
Oct 11, 2026, 5:25 PM EDT ended, time not reported Connecticut River, MA CITY OF HOLYOKE HOL023 JEFFERSON ST. Combined sewer overflow not reported CITY OF HOLYOKE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record e52ba69f-a879-4a7e-a109-f02ededa289f, published Oct 13, 2026, 8:02 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF HOLYOKE, Oct 11, 2026, 5:25 PM EDT · Map
Oct 11, 2026, 5:20 PM EDT ended, time not reported Connecticut River, MA SPRINGFIELD WATER & SEWER COMMISSION SPR013 BRIDGE ST. Combined sewer overflow not reported SPRINGFIELD WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 30e6c6fb-a5da-44db-aca3-ec52fac4ae4a, published Oct 12, 2026, 9:10 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, SPRINGFIELD WATER & SEWER COMMISSION, Oct 11, 2026, 5:20 PM EDT · Map
Oct 11, 2026, 5:20 PM EDT ended, time not reported Connecticut River, MA SPRINGFIELD WATER & SEWER COMMISSION SPR016 YORK ST. Combined sewer overflow not reported SPRINGFIELD WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 3908853f-ebcc-4738-aa78-e52bf2141512, published Oct 12, 2026, 9:08 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, SPRINGFIELD WATER & SEWER COMMISSION, Oct 11, 2026, 5:20 PM EDT · Map
Oct 11, 2026, 5:20 PM EDT ended, time not reported Acushnet River, MA CITY OF NEW BEDFORD NEW023 COFFIN AVE Combined sewer overflow not reported CITY OF NEW BEDFORD (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 26245656-9cc0-4624-9c45-7513035a7536, published Oct 11, 2026, 10:43 PM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF NEW BEDFORD, Oct 11, 2026, 5:20 PM EDT · Map
Oct 11, 2026, 5:10 PM EDT ended, time not reported Connecticut River, MA CITY OF HOLYOKE HOL09 BERKSHIRE ST. Combined sewer overflow not reported CITY OF HOLYOKE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 8d89acb8-13f5-4fed-bbc3-fc56210e9fc1, published Oct 13, 2026, 8:08 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF HOLYOKE, Oct 11, 2026, 5:10 PM EDT · Map
Oct 11, 2026, 5:10 PM EDT ended, time not reported Connecticut River, MA CITY OF HOLYOKE HOL02 PROVIDENCE HOSPITAL Combined sewer overflow not reported CITY OF HOLYOKE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 32f0efb2-7544-4294-a22b-08f2b8bc4dd7, published Oct 13, 2026, 8:05 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF HOLYOKE, Oct 11, 2026, 5:10 PM EDT · Map
Oct 11, 2026, 5:10 PM EDT ended, time not reported Clarks Cove, MA CITY OF NEW BEDFORD NEW003 COVE RD & PADNARAM AVE Combined sewer overflow not reported CITY OF NEW BEDFORD (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record fdf791dc-0cda-4a88-926c-e636e41d8610, published Oct 11, 2026, 10:41 PM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF NEW BEDFORD, Oct 11, 2026, 5:10 PM EDT · Map
Oct 11, 2026, 5:05 PM EDT ended, time not reported “MILL R.” (not placed) SPRINGFIELD WATER & SEWER COMMISSION SPR046 BELMONT ST. Combined sewer overflow not reported SPRINGFIELD WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 5abd6ae0-7142-498d-bfec-4d6a9a245e18, published Oct 12, 2026, 9:15 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, SPRINGFIELD WATER & SEWER COMMISSION, Oct 11, 2026, 5:05 PM EDT · Map
Oct 11, 2026, 5:05 PM EDT ended, time not reported Connecticut River, MA SPRINGFIELD WATER & SEWER COMMISSION SPR014 ELM ST. Combined sewer overflow not reported SPRINGFIELD WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 7e180495-b0f1-4b4a-9092-cf3df6ef6a1b, published Oct 12, 2026, 9:07 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, SPRINGFIELD WATER & SEWER COMMISSION, Oct 11, 2026, 5:05 PM EDT · Map
Oct 11, 2026, 5:00 PM EDT ended, time not reported Connecticut River, MA SPRINGFIELD WATER & SEWER COMMISSION SPR042 SPRINGFIELD WWTP BYPASS AT BONDI'S ISLAND Combined sewer overflow not reported SPRINGFIELD WATER & SEWER COMMISSION (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 14da5d06-a714-48c2-9ce5-b0f6450aea48, published Oct 12, 2026, 9:06 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, SPRINGFIELD WATER & SEWER COMMISSION, Oct 11, 2026, 5:00 PM EDT · Map
Oct 11, 2026, 4:15 PM EDT ended, time not reported Connecticut River, MA CITY OF HOLYOKE HOL020 CLEVELAND ST. Combined sewer overflow not reported CITY OF HOLYOKE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record e7261ecc-4444-4012-9247-3c9d3648e918, published Oct 13, 2026, 8:00 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF HOLYOKE, Oct 11, 2026, 4:15 PM EDT · Map
Oct 11, 2026, 4:00 PM EDT ended, time not reported Connecticut River, MA CITY OF HOLYOKE HOL018 WALNUT ST. Combined sewer overflow not reported CITY OF HOLYOKE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record ed874325-e121-47d0-8451-8691c015150c, published Oct 13, 2026, 7:59 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF HOLYOKE, Oct 11, 2026, 4:00 PM EDT · Map
Oct 11, 2026, 4:00 PM EDT ended, time not reported Connecticut River, MA CITY OF HOLYOKE HOL08 SPRINGDALE PARK Combined sewer overflow not reported CITY OF HOLYOKE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 019581de-002c-418d-aa55-ee4de53f3d36, published Oct 13, 2026, 7:57 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Combined sewer overflow, CITY OF HOLYOKE, Oct 11, 2026, 4:00 PM EDT · Map
Oct 11, 2026, 8:30 AM EDT Oct 11, 2026, 1:00 PM EDT “NORTH NASHUA RIVER” (not placed) CITY OF FITCHBURG 063 Blended (partially treated) discharge 1.2 million gal CITY OF FITCHBURG (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 095c6e05-a77f-4b55-a09e-1bc7c9abc27b, published Oct 13, 2026, 9:15 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Blended (partially treated) discharge, CITY OF FITCHBURG, Oct 11, 2026, 8:30 AM EDT · Map
Oct 11, 2026, 4:39 AM EDT ended, time not reported Merrimack River, MA LOWELL REGIONAL WASTEWATER UTILITY 035 Blended (partially treated) discharge not reported LOWELL REGIONAL WASTEWATER UTILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 1ed172ed-ed7a-4cc8-b567-6f33fa4b02e7, published Oct 12, 2026, 6:07 AM EDT, retrieved 2026-11-02 11:54 UTC · notice Event: Blended (partially treated) discharge, LOWELL REGIONAL WASTEWATER UTILITY, Oct 11, 2026, 4:39 AM EDT · Map