DirtyWaterWatch

Massachusetts / Dischargers /

Rockland Wastewater Treatment Facility

PARTIALLY_TREATED · Massachusetts · Rockland

NPDES permit
MA0101923
Outfalls
none with coordinates yet
Receiving waters
French Stream
Tracked waters
none
Events tracked
9 discharges · latest Apr 7, 2024, 11:30 PM EDT
Volume reported
23,354,190 gallons across the 7 discharges that give a volume (2 without one)

Source: discharger record from the project's research and EPA ECHO (dischargers.json); counts from the 9 event records below, as of 2026-11-02 11:56 UTC.

How it tells the public

Not verified; per 314 CMR 16.06(3) each non-CSO system files an SSO Public Notification Plan and must post advisories on its website and email/text subscribers for reportable events. Events appear in the MassDEP portal as permiteeClass 'Non-CSO'.

Source: the project's research on each operator's notification channel (research/<state>/dischargers.json), checked by fetching the operator's pages.

Outfalls

Event history

Events reported for Rockland Wastewater Treatment Facility, newest first
StartEnd Water OutfallTypeVolumeSourceLinks
Apr 7, 2024, 11:30 PM EDT Apr 16, 2024, 5:00 PM EDT “FRENCH STREAM” (not placed) 001 Blended (partially treated) discharge 9 million gal ROCKLAND WASTEWATER TREATMENT FACILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 37831641-7397-4c28-8a4f-e2a27587702a, published Apr 8, 2024, 4:15 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)

This record in the archive list
Mar 29, 2024, 6:00 AM EDT ongoing (as reported) “FRENCH STREAM” (not placed) 001 Blended (partially treated) discharge not reported ROCKLAND WASTEWATER TREATMENT FACILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 44fb209c-76b0-4636-b032-a22660625747, published Mar 29, 2024, 9:28 AM EDT, retrieved 2026-11-02 10:58 UTC · notice Event: Blended (partially treated) discharge, ROCKLAND WASTEWATER TREATMENT FACILITY, Mar 29, 2024, 6:00 AM EDT · Map
Mar 24, 2024, 9:00 AM EDT Mar 26, 2024, 4:00 AM EDT “FRENCH STREAM” (not placed) 001 Blended (partially treated) discharge 1.79 million gal ROCKLAND WASTEWATER TREATMENT FACILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 4a32e31f-e9ee-404f-b1be-08c9b14f3d2e, published Mar 27, 2024, 9:31 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)

This record in the archive list
Mar 24, 2024, 9:00 AM EDT Mar 26, 2024, 4:00 AM EDT “FRENCH STREAM” (not placed) 001 Blended (partially treated) dischargerevised not reported ROCKLAND WASTEWATER TREATMENT FACILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record c3ec8bb8-9e79-4b45-b3c0-946aeb58358f, published Mar 24, 2024, 11:01 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)

This record in the archive list
Mar 10, 2024, 11:00 AM EDT Mar 12, 2024, 5:30 AM EDT “FRENCH STREAM” (not placed) 001 Blended (partially treated) discharge 1.77 million gal ROCKLAND WASTEWATER TREATMENT FACILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 9d5a93c4-1ccf-464a-8c08-de18db5e7dd5, published Mar 13, 2024, 11:18 AM EDT, retrieved 2026-11-02 10:58 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
Mar 10, 2024, 11:00 AM EDT Mar 12, 2024, 5:30 AM EDT “FRENCH STREAM” (not placed) 001 Blended (partially treated) dischargerevised not reported ROCKLAND WASTEWATER TREATMENT FACILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 61d6187a-5112-4ff3-96c8-516415352346, published Mar 10, 2024, 12:47 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)

This record in the archive list
Jan 29, 2024, 12:00 PM EST Jan 30, 2024, 2:00 PM EST “FRENCH STREAM” (not placed) 001 Blended (partially treated) discharge 1.08 million gal ROCKLAND WASTEWATER TREATMENT FACILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 157fc88b-5876-4113-aa97-294a5edae57d, published Feb 1, 2024, 9:39 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)

This record in the archive list
Jan 29, 2024, 12:00 PM EST Jan 30, 2024, 2:00 PM EST “FRENCH STREAM” (not placed) 001 Blended (partially treated) dischargerevised not reported ROCKLAND WASTEWATER TREATMENT FACILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 6ca16fc4-f0ef-48de-b150-5ce03f4e0ca6, published Jan 29, 2024, 3:16 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)

This record in the archive list
Jan 10, 2024, 11:00 AM EST Jan 18, 2024, 1:00 AM EST “FRENCH STREAM” (not placed) 001 Blended (partially treated) discharge 6.9 million gal ROCKLAND WASTEWATER TREATMENT FACILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record da8ae1d5-34b0-4617-8d45-651d5f2874d8, published Jan 19, 2024, 11:44 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)

This record in the archive list
Jan 10, 2024, 11:00 AM EST Jan 18, 2024, 1:00 AM EST “FRENCH STREAM” (not placed) 001 Blended (partially treated) dischargerevised not reported ROCKLAND WASTEWATER TREATMENT FACILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 12847aa6-78bf-4a24-a291-5181639d7ed6, published Jan 10, 2024, 3:49 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)

This record in the archive list
Mar 15, 2023, 7:30 AM EDT Mar 17, 2023, 3:00 AM EDT “French's Stream” (not placed) not stated Sanitary sewer overflow 1.81 million gal ROCKLAND WASTEWATER TREATMENT FACILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 1bf5e4fb-d9c5-45dc-98d5-8bbe0a750d2a, published Mar 17, 2023, 9:25 AM EDT, retrieved 2026-11-02 10:58 UTC · notice record below
Full record (older than 180 days, so no page of its own)

This record in the archive list
Mar 15, 2023, 7:30 AM EDT ongoing (as reported) “French's Stream” (not placed) not stated Sanitary sewer overflow not reported ROCKLAND WASTEWATER TREATMENT FACILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 19c90858-3c90-4d5a-981a-d0dd079b5a38, published Mar 17, 2023, 9:17 AM EDT, retrieved 2026-11-02 10:58 UTC · notice Event: Sanitary sewer overflow, ROCKLAND WASTEWATER TREATMENT FACILITY, Mar 15, 2023, 7:30 AM EDT · Map
Jan 26, 2023, 9:00 AM EST Jan 27, 2023, 9:00 AM EST “FRENCH STREAM” (not placed) 001 Blended (partially treated) discharge 1 million gal ROCKLAND WASTEWATER TREATMENT FACILITY (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 8636cdce-a87e-43a2-9b05-83403f163d18, published Jan 27, 2023, 12:28 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)

This record in the archive list

History

  • Discharge events, last 12 months0Dec 2025 to Nov 2026
  • Days with a discharge, last 12 months0Dec 2025 to Nov 2026
  • Hours under advisory, last 12 months0Dec 2025 to Nov 2026; on this discharger's reports
  • 2026 season under advisory0.0%May to October; 0 h

Discharge events per month

7 events, Jan 2022 to Nov 2026. Counted from 7 verified or annual reports.

  • Combined sewer overflow
  • Sanitary sewer overflow
  • Bypass, blended or other
  • No source
  • Partly covered or sparse source
No 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
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 20220000No source
Jun 20220000Partly covered or sparse source
Jul 20220000
Aug 20220000
Sep 20220000
Oct 20220000
Nov 20220000
Dec 20220000
Jan 20230011Verified or annual reports
Feb 20230000
Mar 20230101Verified or annual reports
Apr 20230000
May 20230000
Jun 20230000
Jul 20230000
Aug 20230000
Sep 20230000
Oct 20230000
Nov 20230000
Dec 20230000
Jan 20240022Verified or annual reports
Feb 20240000
Mar 20240022Verified or annual reports
Apr 20240011Verified or annual reports
May 20240000
Jun 20240000
Jul 20240000
Aug 20240000
Sep 20240000
Oct 20240000
Nov 20240000
Dec 20240000
Jan 20250000
Feb 20250000
Mar 20250000
Apr 20250000
May 20250000
Jun 20250000
Jul 20250000
Aug 20250000
Sep 20250000
Oct 20250000
Nov 20250000
Dec 20250000
Jan 20260000
Feb 20260000
Mar 20260000
Apr 20260000
May 20260000
Jun 20260000
Jul 20260000
Aug 20260000
Sep 20260000
Oct 20260000
Nov 20260000

Hours under advisory per month

Hours this discharger's reports put a water under an advisory, by the map's red rules.

  • Advisory in effect
  • No source
  • Partly covered or sparse source

No source covers 2022-01 to 2022-05. Official beach and cyanobacteria advisories are counted on water pages only. MassDEP portal records begin 2022-06-30. Verified Data Reports arrive after the month ends, so the latest months count public notices.

Source: MassDEP sewage notification portal. Covered 2022-06-30 to 2026-11-02.

Show table
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 202200744No source
Jun 202200720Partly covered or sparse source
Jul 202200744
Aug 202200744
Sep 202200720
Oct 202200744
Nov 202200720
Dec 202200744
Jan 20237272744
Feb 202300672
Mar 20239292744
Apr 202300720
May 202300744
Jun 202300720
Jul 202300744
Aug 202300744
Sep 202300720
Oct 202300744
Nov 202300720
Dec 202300744
Jan 2024290290744
Feb 20241414696
Mar 2024182182744
Apr 2024258258720
May 202400744
Jun 202400720
Jul 202400744
Aug 202400744
Sep 202400720
Oct 202400744
Nov 202400720
Dec 202400744
Jan 202500744
Feb 202500672
Mar 202500744
Apr 202500720
May 202500744
Jun 202500720
Jul 202500744
Aug 202500744
Sep 202500720
Oct 202500744
Nov 202500720
Dec 202500744
Jan 202600744
Feb 202600672
Mar 202600744
Apr 202600720
May 202600744
Jun 202600720
Jul 202600744
Aug 202600744
Sep 202600720
Oct 202600744
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

No source covers 2022-01 to 2022-05.

Source: MassDEP sewage notification portal. Covered 2022-06-30 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 20220No source
Jun 20220Partly covered or sparse source
Jul 20220
Aug 20220
Sep 20220
Oct 20220
Nov 20220
Dec 20220
Jan 20232
Feb 20230
Mar 20233
Apr 20230
May 20230
Jun 20230
Jul 20230
Aug 20230
Sep 20230
Oct 20230
Nov 20230
Dec 20230
Jan 202411
Feb 20240
Mar 20246
Apr 202410
May 20240
Jun 20240
Jul 20240
Aug 20240
Sep 20240
Oct 20240
Nov 20240
Dec 20240
Jan 20250
Feb 20250
Mar 20250
Apr 20250
May 20250
Jun 20250
Jul 20250
Aug 20250
Sep 20250
Oct 20250
Nov 20250
Dec 20250
Jan 20260
Feb 20260
Mar 20260
Apr 20260
May 20260
Jun 20260
Jul 20260
Aug 20260
Sep 20260
Oct 20260
Nov 20260

Reported volume per year

Gallons, summed from the 7 events that gave a number.

  • Partly covered or sparse source
Sparse source

Source: MassDEP sewage notification portal. Covered 2022-06-30 to 2026-11-02.

Show table
Reported volume per year
YearGallonsEvents with a numberEvents withoutCoverage
2022000Partly covered or sparse source
20232,812,51520
202420,541,67550
2025000
2026000

Hours under advisory per year

Hours under advisory each year; 2026 to date.

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

Official beach and cyanobacteria advisories are counted on water pages only.

Source: MassDEP sewage notification portal. Covered 2022-06-30 to 2026-11-02.

Show table
Hours under advisory per year
YearHours under advisoryShare of the yearCoverage
202200.0%Partly covered or sparse source
20231641.9%
20247438.5%
202500.0%
202600.0%

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). 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
Share of the May to October season under advisory
SeasonShare under advisoryHours under advisoryHours coveredSeason hoursPartly covered
20220.0%02,9584,416yes
20230.0%04,4164,416
20240.0%04,4164,416
20250.0%04,4164,416
20260.0%04,4164,416

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.

Source: MassDEP sewage notification portal. Covered 2022-06-30 to 2026-11-02.

Show table
Discharge events by calendar month, all years
MonthEventsYears of records
Jan34
Feb04
Mar34
Apr14
May04
Jun05
Jul05
Aug05
Sep05
Oct05
Nov05
Dec04

Discharge events by outfall

The 1 outfalls with the most events of 1, all years.

MassDEP portal records begin 2022-06-30. Verified Data Reports arrive after the month ends, so the latest months count public notices.

Source: MassDEP sewage notification portal. Covered 2022-06-30 to 2026-11-02.

Show table
Discharge events by outfall
OutfallEvents
0016
Outfall not stated1
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