Greater Lawrence Sanitary District
CSO · Massachusetts · Lawrence, Methuen, Andover, North Andover, Dracut
- NPDES permit
- MA0100447
- Outfalls
- 5 with coordinates in the registry
- Receiving waters
- MERRIMACK RIVER; SPICKETT HARBOR
- Tracked waters
- Merrimack River, MA
- Events tracked
- 87 discharges · latest Jul 30, 2026, 2:33 AM EDT
- Volume reported
- 281,518,543 gallons across the 85 discharges that give a volume (2 without one)
Source: discharger record from the project's research and EPA ECHO (dischargers.json); counts from the 87 event records below, as of 2026-11-02 11:56 UTC.
How it tells the public
GLSD Everbridge sign-up https://member.everbridge.net/355009111785667/login (per MRWC page): emails at start and end, volume reported days later. MassDEP portal: 218 rows, latest 2026-07-30; median 2.9 h start-to-portal.
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.
5 outfalls in the registry
- 002 49+40: MERRIMACK STREET · CSO|DSW|SW · MERRIMACK RIVER
- 003 93+15: SOUTH CANAL STREET · CSO|DSW|SW · MERRIMACK RIVER
- 004 44+85: ISLAND STREET · CSO|DSW|SW · MERRIMACK RIVER
- 005 79+30: CANAL STREET CASEY BRIDGE · CSO|DSW|SW · MERRIMACK RIVER
- 006 17+60: GENERAL STREET GENERAL HOSPITAL · CSO|DSW|SW · SPICKET RIVER · not on a tracked water
Source: EPA ECHO CSO outfall inventory matched to waters (data/outfalls-ne.json).
Event history
| Start | End | Water | Outfall | Type | Volume | Source | Links |
|---|---|---|---|---|---|---|---|
| Jul 30, 2026, 2:33 AM EDT | Jul 30, 2026, 4:06 AM EDT | Merrimack River, MA | 001 | Blended (partially treated) discharge | 1.9 million gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 35b74d41-2a29-4384-8421-868884eb0913, published Jul 31, 2026, 6:31 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Blended (partially treated) discharge, GREATER LAWRENCE SANITARY DISTRICT, Jul 30, 2026, 2:33 AM EDT · Map |
| Jul 30, 2026, 2:33 AM EDT | Jul 30, 2026, 4:06 AM EDT | Merrimack River, MA | 001 | Blended (partially treated) dischargerevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record c5eccc41-d1ec-4e90-a558-02d67c9cbf62, published Jul 30, 2026, 6:20 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Blended (partially treated) discharge, GREATER LAWRENCE SANITARY DISTRICT, Jul 30, 2026, 2:33 AM EDT · Map |
| Jul 30, 2026, 2:17 AM EDT | Jul 30, 2026, 2:46 AM EDT | Merrimack River, MA | GLSD004 ISLAND STREET | Combined sewer overflow | 314,000 gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record e177075b-585f-482b-9966-d7fe91342186, published Jul 31, 2026, 6:32 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, GREATER LAWRENCE SANITARY DISTRICT, Jul 30, 2026, 2:17 AM EDT · Map |
| Jul 30, 2026, 2:17 AM EDT | Jul 30, 2026, 2:46 AM EDT | Merrimack River, MA | GLSD004 ISLAND STREET | Combined sewer overflowrevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 44a411fd-09e3-4ae8-886b-3a7abab75890, published Jul 30, 2026, 6:19 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, GREATER LAWRENCE SANITARY DISTRICT, Jul 30, 2026, 2:17 AM EDT · Map |
| Jul 28, 2026, 4:16 PM EDT | Jul 28, 2026, 4:34 PM EDT | Merrimack River, MA | GLSD004 ISLAND STREET | Combined sewer overflow | 65,300 gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 1640f101-fa71-4cd2-8340-fdf5ae42e209, published Jul 29, 2026, 1:33 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, GREATER LAWRENCE SANITARY DISTRICT, Jul 28, 2026, 4:16 PM EDT · Map |
| Jul 28, 2026, 4:16 PM EDT | Jul 28, 2026, 4:34 PM EDT | Merrimack River, MA | GLSD004 ISLAND STREET | Combined sewer overflowrevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record d0f8f5c4-dd39-4fa9-950c-44a6ee9d1d49, published Jul 28, 2026, 6:19 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, GREATER LAWRENCE SANITARY DISTRICT, Jul 28, 2026, 4:16 PM EDT · Map |
| Jul 28, 2026, 4:15 PM EDT | Jul 28, 2026, 5:28 PM EDT | Merrimack River, MA | 001 | Blended (partially treated) discharge | 790,000 gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record fadeacc4-0f44-4dc3-bff1-13a332e7b772, published Jul 29, 2026, 1:31 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Blended (partially treated) discharge, GREATER LAWRENCE SANITARY DISTRICT, Jul 28, 2026, 4:15 PM EDT · Map |
| Jul 28, 2026, 4:15 PM EDT | Jul 28, 2026, 5:28 PM EDT | Merrimack River, MA | 001 | Blended (partially treated) dischargerevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 6096903e-8aa4-4221-860f-044fba33afb7, published Jul 28, 2026, 6:20 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Blended (partially treated) discharge, GREATER LAWRENCE SANITARY DISTRICT, Jul 28, 2026, 4:15 PM EDT · Map |
| Jun 26, 2026, 9:26 PM EDT | Jun 26, 2026, 10:00 PM EDT | Merrimack River, MA | 001 | Blended (partially treated) discharge | 890,000 gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 4e08c4fb-a1b1-4075-9bf8-dcf60eddbf0d, published Jun 27, 2026, 2:17 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Blended (partially treated) discharge, GREATER LAWRENCE SANITARY DISTRICT, Jun 26, 2026, 9:26 PM EDT · Map |
| Jun 26, 2026, 9:26 PM EDT | Jun 26, 2026, 10:00 PM EDT | Merrimack River, MA | 001 | Blended (partially treated) dischargerevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 12f51154-e7e9-4188-b2c5-d571446e24f6, published Jun 27, 2026, 2:14 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Blended (partially treated) discharge, GREATER LAWRENCE SANITARY DISTRICT, Jun 26, 2026, 9:26 PM EDT · Map |
| Jun 26, 2026, 8:53 PM EDT | Jun 26, 2026, 9:27 PM EDT | Merrimack River, MA | GLSD004 ISLAND STREET | Combined sewer overflow | 1.04 million gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 202de9f5-b92a-406b-b208-a66e564696ea, published Jun 27, 2026, 2:12 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, GREATER LAWRENCE SANITARY DISTRICT, Jun 26, 2026, 8:53 PM EDT · Map |
| Jun 26, 2026, 8:53 PM EDT | Jun 26, 2026, 9:27 PM EDT | Merrimack River, MA | GLSD004 ISLAND STREET | Combined sewer overflowrevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record fe2dee61-a475-4e50-aaf7-711d4e0ccceb, published Jun 27, 2026, 1:05 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | Event: Combined sewer overflow, GREATER LAWRENCE SANITARY DISTRICT, Jun 26, 2026, 8:53 PM EDT · Map |
| Oct 20, 2025, 11:54 AM EDT | Oct 20, 2025, 1:00 PM EDT | Merrimack River, MA | 001 | Blended (partially treated) discharge | 560,000 gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 009f0b73-24f5-4dc9-9280-fe4330302697, published Oct 21, 2025, 5:58 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 20, 2025, 11:54 AM EDT | Oct 20, 2025, 1:00 PM EDT | Merrimack River, MA | 001 | Blended (partially treated) dischargerevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 217e1319-731e-459c-bcb3-b02acb4cb9da, published Oct 20, 2025, 4:16 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) | |||||||
| Aug 13, 2025, 8:24 PM EDT | Aug 13, 2025, 9:04 PM EDT | Merrimack River, MA | 001 | Blended (partially treated) discharge | 450,000 gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 68d8b038-b24a-4446-9593-b5cd0d42d4a7, published Aug 14, 2025, 11:30 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 13, 2025, 8:24 PM EDT | Aug 13, 2025, 9:04 PM EDT | Merrimack River, MA | 001 | Blended (partially treated) dischargerevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 7ec253d6-3676-446f-bc8a-9f54ff028936, published Aug 14, 2025, 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) | |||||||
| Aug 13, 2025, 7:10 PM EDT | Aug 13, 2025, 7:35 PM EDT | “SPICKETT HARBOR” (not placed) | GLSD006 GENERAL STREET GENERAL HOSPITAL | Combined sewer overflow | 112,047 gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record f14dd312-364e-439a-8704-60f9b88f4a73, published Aug 14, 2025, 11:26 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 13, 2025, 7:00 PM EDT | Aug 13, 2025, 7:55 PM EDT | Merrimack River, MA | GLSD002 MERRIMACK STREET | Combined sewer overflow | 2.41 million gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 00dddec9-50a8-44c5-a288-6cf16daf8ebc, published Aug 14, 2025, 11:28 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Aug 13, 2025, 7:00 PM EDT | Aug 13, 2025, 7:55 PM EDT | Merrimack River, MA | GLSD004 ISLAND STREET | Combined sewer overflow | 8.73 million gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 6306b85a-529f-4694-bc9a-40ddc4d331a5, published Aug 14, 2025, 11:25 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 13, 2025, 7:00 PM EDT | Aug 13, 2025, 7:35 PM EDT | “SPICKETT HARBOR” (not placed) | GLSD006 GENERAL STREET GENERAL HOSPITAL | Combined sewer overflowrevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 4facf4f7-261e-4f43-a530-6b90f9120640, published Aug 14, 2025, 11:17 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 13, 2025, 7:00 PM EDT | Aug 13, 2025, 7:55 PM EDT | Merrimack River, MA | GLSD004 ISLAND STREET | Combined sewer overflowrevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 303de660-8e2b-4578-b6c7-013214157ca8, published Aug 14, 2025, 11:16 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Aug 13, 2025, 7:00 PM EDT | Aug 13, 2025, 7:55 PM EDT | Merrimack River, MA | GLSD002 MERRIMACK STREET | Combined sewer overflowrevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 696b35dc-3df2-46ff-a7a9-624c8d39f237, published Aug 14, 2025, 11:15 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) | |||||||
| Dec 11, 2024, 9:30 AM EST | Dec 11, 2024, 10:12 AM EST | Merrimack River, MA | 001 | Blended (partially treated) discharge | 280,000 gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 44d3c201-c107-4119-b7df-ebb5b8af5018, published Dec 12, 2024, 9:27 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) | |||||||
| Dec 11, 2024, 9:30 AM EST | Dec 11, 2024, 10:12 AM EST | Merrimack River, MA | 001 | Blended (partially treated) dischargerevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 9cfdb878-5d1f-4d9d-8bf4-412756ac9c44, published Dec 12, 2024, 9:25 AM EST, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Aug 19, 2024, 1:38 PM EDT | Aug 19, 2024, 2:55 PM EDT | Merrimack River, MA | 001 | Blended (partially treated) discharge | 980,000 gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record ff9b3361-190f-4f89-be31-60fbe57aa131, published Aug 20, 2024, 9:24 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 19, 2024, 1:38 PM EDT | Aug 19, 2024, 2:55 PM EDT | Merrimack River, MA | 001 | Blended (partially treated) dischargerevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 4103e720-aff6-4bec-bc81-ec4784671335, published Aug 19, 2024, 4:03 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Aug 19, 2024, 1:25 PM EDT | Aug 19, 2024, 1:37 PM EDT | Merrimack River, MA | GLSD004 ISLAND STREET | Combined sewer overflow | 117,000 gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 90e3b7c8-0aa3-4055-86d7-051a7781052e, published Aug 20, 2024, 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) | |||||||
| Aug 19, 2024, 1:25 PM EDT | Aug 19, 2024, 1:37 PM EDT | Merrimack River, MA | GLSD004 ISLAND STREET | Combined sewer overflowrevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record bb722528-efa6-4714-b16f-d3073cadec83, published Aug 19, 2024, 4:01 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) | |||||||
| Aug 15, 2024, 4:05 PM EDT | Aug 15, 2024, 5:35 PM EDT | Merrimack River, MA | 001 | Blended (partially treated) discharge | 2.04 million gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 36be300e-494d-43de-af5a-5d11d6e8934c, published Aug 16, 2024, 9:20 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 15, 2024, 4:05 PM EDT | Aug 15, 2024, 5:35 PM EDT | Merrimack River, MA | 001 | Blended (partially treated) dischargerevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 33c67a3d-4772-4fdf-af6e-e84fe04ba595, published Aug 16, 2024, 9:18 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) | |||||||
| Aug 15, 2024, 3:48 PM EDT | Aug 15, 2024, 4:02 PM EDT | Merrimack River, MA | GLSD004 ISLAND STREET | Combined sewer overflow | 128,000 gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record cafc1e44-bc7b-4bc8-91fc-031fd6469927, published Aug 16, 2024, 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) | |||||||
| Aug 15, 2024, 3:48 PM EDT | Aug 15, 2024, 4:02 PM EDT | Merrimack River, MA | GLSD004 ISLAND STREET | Combined sewer overflowrevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 11388a12-4667-4468-8bc9-ad166f1c3ce3, published Aug 16, 2024, 9:23 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 4, 2024, 2:58 PM EDT | Aug 4, 2024, 3:15 PM EDT | “SPICKETT HARBOR” (not placed) | GLSD006 GENERAL STREET GENERAL HOSPITAL | Combined sewer overflow | 16,774 gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 1dd558b8-5441-4341-a1ff-6a3f0dfa0960, published Aug 5, 2024, 2:48 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 4, 2024, 2:58 PM EDT | Aug 4, 2024, 3:15 PM EDT | “SPICKETT HARBOR” (not placed) | GLSD006 GENERAL STREET GENERAL HOSPITAL | Combined sewer overflowrevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record d026fa8b-e00e-4469-8f03-3694dc9c9fbd, published Aug 5, 2024, 2:11 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 4, 2024, 2:47 PM EDT | Aug 4, 2024, 3:41 PM EDT | Merrimack River, MA | GLSD004 ISLAND STREET | Combined sewer overflow | 2.91 million gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 6bcdfe4a-4112-4364-ab65-e3c106dfa853, published Aug 5, 2024, 2:49 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 4, 2024, 2:47 PM EDT | Aug 4, 2024, 3:41 PM EDT | Merrimack River, MA | GLSD004 ISLAND STREET | Combined sewer overflowrevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 47c72cb7-468d-42b1-bdb9-97fd60e0d5f8, published Aug 5, 2024, 2:09 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 4, 2024, 2:39 PM EDT | Aug 4, 2024, 3:01 PM EDT | Merrimack River, MA | GLSD002 MERRIMACK STREET | Combined sewer overflow | 565,000 gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record af087777-5be7-4611-a821-112857e0dea5, published Aug 5, 2024, 2:46 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) | |||||||
| Aug 4, 2024, 2:39 PM EDT | Aug 4, 2024, 3:01 PM EDT | Merrimack River, MA | GLSD002 MERRIMACK STREET | Combined sewer overflowrevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 9819a7c0-057b-4c47-97f4-0922f8c9aea1, published Aug 5, 2024, 2:13 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 4, 2024, 2:31 PM EDT | Aug 4, 2024, 4:50 PM EDT | Merrimack River, MA | 001 | Blended (partially treated) discharge | 2.19 million gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 27778c67-86fa-45d4-9c66-76405ecbb0fe, published Aug 5, 2024, 2:55 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 4, 2024, 2:31 PM EDT | Aug 4, 2024, 4:50 PM EDT | Merrimack River, MA | 001 | Blended (partially treated) dischargerevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record aa239e03-720f-4a41-bb48-b6aad7a78b0f, published Aug 5, 2024, 2:06 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Aug 2, 2024, 6:50 PM EDT | Aug 2, 2024, 7:15 PM EDT | Merrimack River, MA | 001 | Blended (partially treated) discharge | 711,000 gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record fcfde36c-62f8-4c7b-9660-6a2f4f3430ac, published Aug 3, 2024, 11:11 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 2, 2024, 6:50 PM EDT | Aug 2, 2024, 7:15 PM EDT | Merrimack River, MA | 001 | Blended (partially treated) dischargerevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record e07ed01d-7bfb-4ce3-9ab0-b6013805d0d5, published Aug 3, 2024, 11:07 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 2, 2024, 6:29 PM EDT | Aug 2, 2024, 6:34 PM EDT | Merrimack River, MA | GLSD004 ISLAND STREET | Combined sewer overflow | 28,700 gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 503bd075-cac7-43d0-8398-a476e23d75c1, published Aug 3, 2024, 11:05 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 2, 2024, 6:29 PM EDT | Aug 2, 2024, 6:34 PM EDT | Merrimack River, MA | GLSD004 ISLAND STREET | Combined sewer overflowrevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 12a776d0-b2a2-451c-9bff-0ed87b0fb7ba, published Aug 3, 2024, 11:02 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 16, 2024, 9:23 PM EDT | Jul 16, 2024, 9:50 PM EDT | Merrimack River, MA | GLSD004 ISLAND STREET | Combined sewer overflow | 67,200 gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 13334319-8efd-4e44-9e5f-60f77d5061cd, published Jul 17, 2024, 2:30 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) | |||||||
| Jul 16, 2024, 9:23 PM EDT | Jul 16, 2024, 9:50 PM EDT | Merrimack River, MA | GLSD004 ISLAND STREET | Combined sewer overflowrevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record ff804e38-a993-42fe-9353-5a5b6769ae0b, published Jul 17, 2024, 2:28 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 30, 2024, 10:46 AM EDT | May 30, 2024, 11:03 AM EDT | Merrimack River, MA | GLSD004 ISLAND STREET | Combined sewer overflow | 98,100 gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 0cf9a5a8-8bb9-41bb-93eb-f591f9e35e0f, published May 30, 2024, 3:43 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) | |||||||
| May 30, 2024, 10:46 AM EDT | May 30, 2024, 11:03 AM EDT | Merrimack River, MA | GLSD004 ISLAND STREET | Combined sewer overflowrevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record ff8cc844-24c5-419d-99ac-89e5b28e27f4, published May 30, 2024, 3:11 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 30, 2024, 10:20 AM EDT | May 30, 2024, 12:39 PM EDT | Merrimack River, MA | 001 | Blended (partially treated) discharge | 4.75 million gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 6303dc00-dbb0-41ee-ba29-674058e26ca4, published May 30, 2024, 3:41 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 30, 2024, 10:20 AM EDT | May 30, 2024, 12:39 PM EDT | Merrimack River, MA | 001 | Blended (partially treated) dischargerevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 02589b82-220e-4927-ba62-56891351c8d1, published May 30, 2024, 3:07 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Mar 23, 2024, 7:58 PM EDT | Mar 23, 2024, 9:10 PM EDT | Merrimack River, MA | GLSD004 ISLAND STREET | Combined sewer overflow | 1.87 million gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record c1a6b5de-ad6b-4623-8c04-f3a578c588a2, published Mar 25, 2024, 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) | |||||||
| Mar 23, 2024, 7:58 PM EDT | Mar 23, 2024, 9:10 PM EDT | Merrimack River, MA | GLSD004 ISLAND STREET | Combined sewer overflowrevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 08aba3bd-0313-464b-a1f6-e60563851239, published Mar 23, 2024, 10:47 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) | |||||||
| Mar 23, 2024, 7:34 PM EDT | Mar 23, 2024, 11:11 PM EDT | Merrimack River, MA | 001 | Blended (partially treated) discharge | 6.29 million gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record dee20ea5-201d-405f-b30e-c34456f124ad, published Mar 25, 2024, 4:04 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) | |||||||
| Mar 23, 2024, 7:34 PM EDT | Mar 23, 2024, 11:11 PM EDT | Merrimack River, MA | 001 | Blended (partially treated) dischargerevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 21ff0aca-6ef3-4184-a0ae-9b2f2dda65d6, published Mar 23, 2024, 11:27 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 10, 2024, 3:27 AM EDT | Mar 10, 2024, 5:48 AM EDT | Merrimack River, MA | 001 | Blended (partially treated) discharge | 2.08 million gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record b101d246-46b4-49df-b5e9-093ca5afdebd, published Mar 11, 2024, 2:39 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) | |||||||
| Mar 10, 2024, 3:27 AM EDT | Mar 10, 2024, 5:48 AM EDT | Merrimack River, MA | 001 | Blended (partially treated) dischargerevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 5794ee01-8405-4ddd-8048-0f1a9283b310, published Mar 11, 2024, 2:37 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 7, 2024, 1:45 AM EST | Mar 7, 2024, 3:35 AM EST | Merrimack River, MA | GLSD004 ISLAND STREET | Combined sewer overflow | 3.32 million gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 520ddbad-fc90-4c5f-9118-e3da2b80db88, published Mar 11, 2024, 2:21 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) | |||||||
| Mar 7, 2024, 1:45 AM EST | Mar 7, 2024, 3:35 AM EST | Merrimack River, MA | GLSD004 ISLAND STREET | Combined sewer overflowrevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record bfe39009-d942-4668-affd-03f852614641, published Mar 7, 2024, 2:03 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) | |||||||
| Mar 7, 2024, 1:05 AM EST | Mar 7, 2024, 3:24 AM EST | Merrimack River, MA | 001 | Blended (partially treated) discharge | 2.19 million gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record dcf6a740-0700-483e-9e5b-f79f3d660192, published Aug 5, 2024, 2:52 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 7, 2024, 1:05 AM EST | Mar 7, 2024, 5:15 AM EST | Merrimack River, MA | 001 | Blended (partially treated) dischargerevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record b523637b-cffb-444b-9f58-0750b03a3a69, published Mar 7, 2024, 1:57 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) | |||||||
| Mar 7, 2024, 12:04 AM EST | Mar 7, 2024, 5:15 AM EST | Merrimack River, MA | 001 | Blended (partially treated) discharge | 4.18 million gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 0b0249a5-4e1a-4382-8035-121ad05caa9f, published Mar 11, 2024, 2:27 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Jan 13, 2024, 5:52 AM EST | Jan 13, 2024, 11:42 AM EST | Merrimack River, MA | 001 | Blended (partially treated) discharge | 5.62 million gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record a1d80345-77b0-454c-ba17-d54dab1cb873, published Jan 14, 2024, 1:42 PM EST, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Jan 13, 2024, 5:52 AM EST | Jan 13, 2024, 11:42 AM EST | Merrimack River, MA | 001 | Blended (partially treated) dischargerevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record c3786577-d78b-46ce-8ceb-29a8c7c724c8, published Jan 13, 2024, 4:17 PM EST, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Jan 10, 2024, 3:20 AM EST | Jan 10, 2024, 4:00 AM EST | Merrimack River, MA | GLSD005 CANAL STREET CASEY BRIDGE | Combined sewer overflow | 135,997 gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record dee93991-5176-40f1-9cf7-7d912defca0f, published Jan 10, 2024, 2:17 PM EST, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Jan 10, 2024, 3:20 AM EST | Jan 10, 2024, 4:00 AM EST | Merrimack River, MA | GLSD005 CANAL STREET CASEY BRIDGE | Combined sewer overflowrevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record b84338fd-ea2d-4d56-89fe-6c5b5ed1e2ba, published Jan 10, 2024, 9:36 AM EST, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Jan 10, 2024, 3:13 AM EST | Jan 10, 2024, 4:10 AM EST | Merrimack River, MA | GLSD002 MERRIMACK STREET | Combined sewer overflow | 2 million gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 165d06b6-aa5a-45a4-833f-b28dd540fc05, published Jan 10, 2024, 2:12 PM EST, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Jan 10, 2024, 3:13 AM EST | Jan 10, 2024, 4:10 AM EST | Merrimack River, MA | GLSD002 MERRIMACK STREET | Combined sewer overflowrevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record ba78a0ea-9265-45f7-8b49-dd3872290bac, published Jan 10, 2024, 9:33 AM EST, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Jan 10, 2024, 3:07 AM EST | Jan 10, 2024, 4:35 AM EST | “SPICKETT HARBOR” (not placed) | GLSD006 GENERAL STREET GENERAL HOSPITAL | Combined sewer overflow | 803,334 gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 2ec069e3-0e99-45f6-84f0-0551f04204b9, published Jan 10, 2024, 2:18 PM EST, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Jan 10, 2024, 3:07 AM EST | Jan 10, 2024, 4:35 AM EST | “SPICKETT HARBOR” (not placed) | GLSD006 GENERAL STREET GENERAL HOSPITAL | Combined sewer overflowrevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 372d9328-8985-43ad-b3bc-a4b18acffd3a, published Jan 10, 2024, 9:34 AM EST, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Jan 10, 2024, 2:00 AM EST | Jan 10, 2024, 6:43 AM EST | Merrimack River, MA | GLSD004 ISLAND STREET | Combined sewer overflow | 17.97 million gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 9f133666-e79b-46af-bbef-86a897d67b98, published Jan 10, 2024, 2:15 PM EST, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Jan 10, 2024, 2:00 AM EST | Jan 10, 2024, 6:43 AM EST | Merrimack River, MA | GLSD004 ISLAND STREET | Combined sewer overflowrevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 7272f138-e9bd-4727-bb72-945408995692, published Jan 10, 2024, 9:32 AM EST, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Jan 10, 2024, 1:52 AM EST | Jan 10, 2024, 9:30 AM EST | Merrimack River, MA | 001 | Blended (partially treated) discharge | 9.65 million gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 581ff1a0-d88a-49bd-a592-d28bc0fa8e29, published Jan 10, 2024, 2:25 PM EST, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Jan 10, 2024, 1:52 AM EST | Jan 10, 2024, 9:30 AM EST | Merrimack River, MA | 001 | Blended (partially treated) dischargerevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 0e108659-e279-4c64-9f72-b2b9e31bb0a9, published Jan 10, 2024, 9:30 AM EST, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Dec 18, 2023, 12:11 PM EST | Dec 18, 2023, 12:50 PM EST | “SPICKETT HARBOR” (not placed) | GLSD006 GENERAL STREET GENERAL HOSPITAL | Combined sewer overflow | 69,517 gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record f9f1144d-2964-40e8-a9ef-ff6c1adf7669, published Dec 19, 2023, 3:07 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) | |||||||
| Dec 18, 2023, 12:11 PM EST | Dec 18, 2023, 12:50 PM EST | “SPICKETT HARBOR” (not placed) | GLSD006 GENERAL STREET GENERAL HOSPITAL | Combined sewer overflowrevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record b6aeb4a1-0cd1-4ff7-a94b-9e2890dda169, published Dec 19, 2023, 3:04 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) | |||||||
| Dec 18, 2023, 12:10 PM EST | Dec 18, 2023, 1:11 PM EST | Merrimack River, MA | GLSD002 MERRIMACK STREET | Combined sewer overflow | 782,000 gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 8bf06dd3-01c9-4936-b45f-e2f5bf00453f, published Dec 19, 2023, 3:02 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) | |||||||
| Dec 18, 2023, 12:10 PM EST | Dec 18, 2023, 1:11 PM EST | Merrimack River, MA | GLSD002 MERRIMACK STREET | Combined sewer overflowrevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 02872696-bc47-4eca-8556-a7b512aef694, published Dec 19, 2023, 3:01 PM EST, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Dec 18, 2023, 12:06 PM EST | Dec 18, 2023, 5:22 PM EST | Merrimack River, MA | GLSD004 ISLAND STREET | Combined sewer overflow | 15.11 million gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 46db7af9-2a6f-4f78-a6db-7635c44e0c84, published Dec 19, 2023, 2:58 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) | |||||||
| Dec 18, 2023, 12:06 PM EST | Dec 18, 2023, 5:22 PM EST | Merrimack River, MA | GLSD004 ISLAND STREET | Combined sewer overflowrevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 24026b44-ea6b-4d19-bf0d-03b0fc5a2320, published Dec 19, 2023, 2:56 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) | |||||||
| Dec 18, 2023, 11:27 AM EST | Dec 18, 2023, 7:51 PM EST | Merrimack River, MA | 001 | Blended (partially treated) discharge | 8.69 million gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record f6960fa5-b582-411e-96e6-4e2857baaca6, published Dec 19, 2023, 2:53 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) | |||||||
| Dec 18, 2023, 11:27 AM EST | Dec 18, 2023, 7:51 PM EST | Merrimack River, MA | 001 | Blended (partially treated) dischargerevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 167ed7ac-7eff-4457-ae5a-e5e610252081, published Dec 19, 2023, 2:42 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) | |||||||
| Dec 11, 2023, 2:30 AM EST | Dec 11, 2023, 6:19 AM EST | Merrimack River, MA | 001 | Blended (partially treated) discharge | 4.5 million gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 6ffacb74-1fe7-4790-a756-73be547f1ba1, published Dec 12, 2023, 6:58 AM EST, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Dec 11, 2023, 2:30 AM EST | Dec 11, 2023, 6:19 AM EST | Merrimack River, MA | 001 | Blended (partially treated) dischargerevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record afd10d5d-fd19-4fe4-98ca-9ad6ea813858, published Dec 11, 2023, 2:50 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) | |||||||
| Dec 11, 2023, 2:23 AM EST | Dec 11, 2023, 3:31 AM EST | Merrimack River, MA | GLSD004 ISLAND STREET | Combined sewer overflow | 938,000 gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 19ef07ee-e5a7-4652-950e-5af8476f49be, published Dec 12, 2023, 6:55 AM EST, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Dec 11, 2023, 2:23 AM EST | Dec 11, 2023, 3:31 AM EST | Merrimack River, MA | GLSD004 ISLAND STREET | Combined sewer overflowrevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 9370fa6a-85bf-46ab-bdd0-ff6e61c6b041, published Dec 11, 2023, 2:48 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) | |||||||
| Sep 18, 2023, 10:32 PM EDT | Sep 18, 2023, 11:00 PM EDT | Merrimack River, MA | GLSD005 CANAL STREET CASEY BRIDGE | Combined sewer overflow | 5,650 gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record bdc1c606-e45d-4015-b5fe-92d8935906d5, published Sep 19, 2023, 1:40 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 18, 2023, 10:32 PM EDT | Sep 18, 2023, 11:00 PM EDT | Merrimack River, MA | GLSD005 CANAL STREET CASEY BRIDGE | Combined sewer overflowrevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record a4d16566-6939-4219-9eb8-c449eb64709b, published Sep 19, 2023, 1:35 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 18, 2023, 10:30 PM EDT | Sep 18, 2023, 11:37 PM EDT | Merrimack River, MA | GLSD002 MERRIMACK STREET | Combined sewer overflow | 1.42 million gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record de3e6be3-8d3e-4539-8872-f17fca5c30ce, published Sep 19, 2023, 1:38 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 18, 2023, 10:30 PM EDT | Sep 18, 2023, 11:37 PM EDT | Merrimack River, MA | GLSD002 MERRIMACK STREET | Combined sewer overflowrevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 32ce1994-3445-465c-8adb-7fd7839cb7bf, published Sep 19, 2023, 1:24 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) | |||||||
| Sep 18, 2023, 10:15 PM EDT | Sep 19, 2023, 12:00 AM EDT | “SPICKETT HARBOR” (not placed) | GLSD006 GENERAL STREET GENERAL HOSPITAL | Combined sewer overflow | 357,740 gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record bc12ba3e-769c-4c59-868a-f14d045ae492, published Sep 19, 2023, 1:41 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 18, 2023, 10:15 PM EDT | Sep 19, 2023, 12:00 AM EDT | “SPICKETT HARBOR” (not placed) | GLSD006 GENERAL STREET GENERAL HOSPITAL | Combined sewer overflowrevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 6ba7490c-be21-42c5-af48-65ad0f073a9d, published Sep 19, 2023, 1:37 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 18, 2023, 8:48 PM EDT | Sep 19, 2023, 1:28 AM EDT | Merrimack River, MA | GLSD004 ISLAND STREET | Combined sewer overflow | 3.25 million gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 5172dc59-4b1b-4510-88aa-125d1714b283, published Sep 19, 2023, 1:39 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 18, 2023, 8:48 PM EDT | Sep 19, 2023, 1:28 AM EDT | Merrimack River, MA | GLSD004 ISLAND STREET | Combined sewer overflowrevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 82394b69-0245-41c0-82d0-97fa073dc62d, published Sep 19, 2023, 1:27 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Sep 8, 2023, 3:30 PM EDT | Sep 8, 2023, 4:34 PM EDT | Merrimack River, MA | GLSD004 ISLAND STREET | Combined sewer overflow | 3.25 million gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 3d232128-d982-43b9-b90f-9efab6c3e69f, published Sep 11, 2023, 2:23 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Sep 8, 2023, 3:30 PM EDT | Sep 8, 2023, 4:34 PM EDT | Merrimack River, MA | GLSD004 ISLAND STREET | Combined sewer overflowrevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record dc5cae3c-0b5d-48ba-8999-a0debdacb9ee, published Sep 11, 2023, 2:20 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) | |||||||
| Sep 8, 2023, 2:15 PM EDT | Sep 8, 2023, 3:47 PM EDT | Merrimack River, MA | GLSD002 MERRIMACK STREET | Combined sewer overflow | 376,000 gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 98197992-732b-481d-91fe-f9108c5eaed1, published Sep 11, 2023, 2:21 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) | |||||||
| Sep 8, 2023, 2:15 PM EDT | Sep 8, 2023, 3:47 PM EDT | Merrimack River, MA | GLSD002 MERRIMACK STREET | Combined sewer overflowrevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record b86ff644-384a-4c1c-9a5f-82183d54709a, published Sep 11, 2023, 2:18 PM EDT, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Aug 18, 2023, 10:11 AM EDT | Aug 18, 2023, 10:35 AM EDT | Merrimack River, MA | GLSD005 CANAL STREET CASEY BRIDGE | Combined sewer overflow | 120,249 gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 58334805-05fb-4e85-a023-82ea79176669, published Aug 19, 2023, 8:34 AM EDT, retrieved 2026-11-02 10:58 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Aug 18, 2023, 10:11 AM EDT | Aug 18, 2023, 10:35 AM EDT | Merrimack River, MA | GLSD005 CANAL STREET CASEY BRIDGE | Combined sewer overflowrevised | not reported | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record b38c8f15-db7a-4c6a-944b-30986d07b568, published Aug 19, 2023, 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 18, 2023, 10:09 AM EDT | Aug 18, 2023, 11:00 AM EDT | “SPICKETT HARBOR” (not placed) | GLSD006 GENERAL STREET GENERAL HOSPITAL | Combined sewer overflow | 399,491 gal | GREATER LAWRENCE SANITARY DISTRICT (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 563b415e-70e7-483c-af35-5ab1cb9e1802, published Aug 19, 2023, 8:35 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) | |||||||
Showing the newest 100 events of 173 events. See them all with filters.
History
- Discharge events, last 12 months6Dec 2025 to Nov 2026
- Days with a discharge, last 12 months3Dec 2025 to Nov 2026
- Hours under advisory, last 12 months133Dec 2025 to Nov 2026; on this discharger's reports
- 2026 season under advisory3.0%May to October; 133 h
Discharge events per month
85 events, Jan 2022 to Nov 2026. Counted from 85 verified or annual reports.
- Combined sewer overflow
- Sanitary sewer overflow
- Bypass, blended or other
- No source
- Partly covered or sparse source
No source covers 2022-01 to 2022-05. MassDEP portal records begin 2022-06-30. Verified Data Reports arrive after the month ends, so the latest months count public notices.
Source: MassDEP sewage notification portal. Covered 2022-06-30 to 2026-11-02.
Show table
| Month | Combined sewer overflow | Sanitary sewer overflow | Bypass, blended or other | Total | Counted from | Coverage |
|---|---|---|---|---|---|---|
| Jan 2022 | 0 | 0 | 0 | 0 | No source | |
| Feb 2022 | 0 | 0 | 0 | 0 | No source | |
| Mar 2022 | 0 | 0 | 0 | 0 | No source | |
| Apr 2022 | 0 | 0 | 0 | 0 | No source | |
| May 2022 | 0 | 0 | 0 | 0 | No source | |
| Jun 2022 | 0 | 0 | 0 | 0 | Partly covered or sparse source | |
| Jul 2022 | 1 | 0 | 0 | 1 | Verified or annual reports | |
| Aug 2022 | 0 | 0 | 0 | 0 | ||
| Sep 2022 | 0 | 0 | 1 | 1 | Verified or annual reports | |
| Oct 2022 | 2 | 0 | 0 | 2 | Verified or annual reports | |
| Nov 2022 | 0 | 0 | 0 | 0 | ||
| Dec 2022 | 0 | 0 | 1 | 1 | Verified or annual reports | |
| Jan 2023 | 0 | 0 | 0 | 0 | ||
| Feb 2023 | 0 | 0 | 0 | 0 | ||
| Mar 2023 | 1 | 0 | 0 | 1 | Verified or annual reports | |
| Apr 2023 | 1 | 0 | 0 | 1 | Verified or annual reports | |
| May 2023 | 1 | 0 | 0 | 1 | Verified or annual reports | |
| Jun 2023 | 6 | 0 | 0 | 6 | Verified or annual reports | |
| Jul 2023 | 10 | 0 | 0 | 10 | Verified or annual reports | |
| Aug 2023 | 12 | 0 | 0 | 12 | Verified or annual reports | |
| Sep 2023 | 6 | 0 | 0 | 6 | Verified or annual reports | |
| Oct 2023 | 0 | 0 | 0 | 0 | ||
| Nov 2023 | 0 | 0 | 0 | 0 | ||
| Dec 2023 | 4 | 0 | 2 | 6 | Verified or annual reports | |
| Jan 2024 | 4 | 0 | 2 | 6 | Verified or annual reports | |
| Feb 2024 | 0 | 0 | 0 | 0 | ||
| Mar 2024 | 2 | 0 | 4 | 6 | Verified or annual reports | |
| Apr 2024 | 0 | 0 | 0 | 0 | ||
| May 2024 | 1 | 0 | 1 | 2 | Verified or annual reports | |
| Jun 2024 | 0 | 0 | 0 | 0 | ||
| Jul 2024 | 1 | 0 | 0 | 1 | Verified or annual reports | |
| Aug 2024 | 6 | 0 | 4 | 10 | Verified or annual reports | |
| Sep 2024 | 0 | 0 | 0 | 0 | ||
| Oct 2024 | 0 | 0 | 0 | 0 | ||
| Nov 2024 | 0 | 0 | 0 | 0 | ||
| Dec 2024 | 0 | 0 | 1 | 1 | Verified or annual reports | |
| Jan 2025 | 0 | 0 | 0 | 0 | ||
| Feb 2025 | 0 | 0 | 0 | 0 | ||
| Mar 2025 | 0 | 0 | 0 | 0 | ||
| Apr 2025 | 0 | 0 | 0 | 0 | ||
| May 2025 | 0 | 0 | 0 | 0 | ||
| Jun 2025 | 0 | 0 | 0 | 0 | ||
| Jul 2025 | 0 | 0 | 0 | 0 | ||
| Aug 2025 | 3 | 0 | 1 | 4 | Verified or annual reports | |
| Sep 2025 | 0 | 0 | 0 | 0 | ||
| Oct 2025 | 0 | 0 | 1 | 1 | 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 | 0 | 0 | 0 | 0 | ||
| Apr 2026 | 0 | 0 | 0 | 0 | ||
| May 2026 | 0 | 0 | 0 | 0 | ||
| Jun 2026 | 1 | 0 | 1 | 2 | Verified or annual reports | |
| Jul 2026 | 2 | 0 | 2 | 4 | Verified or annual reports | |
| Aug 2026 | 0 | 0 | 0 | 0 | ||
| Sep 2026 | 0 | 0 | 0 | 0 | ||
| Oct 2026 | 0 | 0 | 0 | 0 | ||
| Nov 2026 | 0 | 0 | 0 | 0 |
Hours under advisory per month
Hours this discharger's reports put a water under an advisory, by the map's red rules.
- Advisory in effect
- No source
- Partly covered or sparse source
No source covers 2022-01 to 2022-05. Official beach and cyanobacteria advisories are counted on water pages only. MassDEP portal records begin 2022-06-30. Verified Data Reports arrive after the month ends, so the latest months count public notices.
Source: MassDEP sewage notification portal. Covered 2022-06-30 to 2026-11-02.
Show table
| Month | Hours under advisory | From discharge windows | Hours in month | Coverage |
|---|---|---|---|---|
| Jan 2022 | 0 | 0 | 744 | No source |
| Feb 2022 | 0 | 0 | 672 | No source |
| Mar 2022 | 0 | 0 | 744 | No source |
| Apr 2022 | 0 | 0 | 720 | No source |
| May 2022 | 0 | 0 | 744 | No source |
| Jun 2022 | 0 | 0 | 720 | Partly covered or sparse source |
| Jul 2022 | 48 | 48 | 744 | |
| Aug 2022 | 0 | 0 | 744 | |
| Sep 2022 | 49 | 49 | 720 | |
| Oct 2022 | 50 | 50 | 744 | |
| Nov 2022 | 0 | 0 | 720 | |
| Dec 2022 | 51 | 51 | 744 | |
| Jan 2023 | 0 | 0 | 744 | |
| Feb 2023 | 0 | 0 | 672 | |
| Mar 2023 | 49 | 49 | 744 | |
| Apr 2023 | 0 | 0 | 720 | |
| May 2023 | 50 | 50 | 744 | |
| Jun 2023 | 181 | 181 | 720 | |
| Jul 2023 | 256 | 256 | 744 | |
| Aug 2023 | 156 | 156 | 744 | |
| Sep 2023 | 103 | 103 | 720 | |
| Oct 2023 | 0 | 0 | 744 | |
| Nov 2023 | 0 | 0 | 720 | |
| Dec 2023 | 108 | 108 | 744 | |
| Jan 2024 | 110 | 110 | 744 | |
| Feb 2024 | 0 | 0 | 696 | |
| Mar 2024 | 155 | 155 | 744 | |
| Apr 2024 | 0 | 0 | 720 | |
| May 2024 | 38 | 38 | 744 | |
| Jun 2024 | 13 | 13 | 720 | |
| Jul 2024 | 49 | 49 | 744 | |
| Aug 2024 | 194 | 194 | 744 | |
| Sep 2024 | 0 | 0 | 720 | |
| Oct 2024 | 0 | 0 | 744 | |
| Nov 2024 | 0 | 0 | 720 | |
| Dec 2024 | 49 | 49 | 744 | |
| Jan 2025 | 0 | 0 | 744 | |
| Feb 2025 | 0 | 0 | 672 | |
| Mar 2025 | 0 | 0 | 744 | |
| Apr 2025 | 0 | 0 | 720 | |
| May 2025 | 0 | 0 | 744 | |
| Jun 2025 | 0 | 0 | 720 | |
| Jul 2025 | 0 | 0 | 744 | |
| Aug 2025 | 50 | 50 | 744 | |
| Sep 2025 | 0 | 0 | 720 | |
| Oct 2025 | 49 | 49 | 744 | |
| Nov 2025 | 0 | 0 | 720 | |
| Dec 2025 | 0 | 0 | 744 | |
| Jan 2026 | 0 | 0 | 744 | |
| Feb 2026 | 0 | 0 | 672 | |
| Mar 2026 | 0 | 0 | 744 | |
| Apr 2026 | 0 | 0 | 720 | |
| May 2026 | 0 | 0 | 744 | |
| Jun 2026 | 49 | 49 | 720 | |
| Jul 2026 | 80 | 80 | 744 | |
| Aug 2026 | 4 | 4 | 744 | |
| Sep 2026 | 0 | 0 | 720 | |
| Oct 2026 | 0 | 0 | 744 | |
| Nov 2026 | 0 | 0 | 32 |
Days with a discharge per month
A day counts when any counted discharge was under way on it (start to reported end, local time); an event with no end counts its start day.
- No source
- Partly covered or sparse source
No source covers 2022-01 to 2022-05.
Source: MassDEP sewage notification portal. Covered 2022-06-30 to 2026-11-02.
Show table
| Month | Days with a discharge | Coverage |
|---|---|---|
| Jan 2022 | 0 | No source |
| Feb 2022 | 0 | No source |
| Mar 2022 | 0 | No source |
| Apr 2022 | 0 | No source |
| May 2022 | 0 | No source |
| Jun 2022 | 0 | Partly covered or sparse source |
| Jul 2022 | 1 | |
| Aug 2022 | 0 | |
| Sep 2022 | 1 | |
| Oct 2022 | 2 | |
| Nov 2022 | 0 | |
| Dec 2022 | 1 | |
| Jan 2023 | 0 | |
| Feb 2023 | 0 | |
| Mar 2023 | 1 | |
| Apr 2023 | 1 | |
| May 2023 | 1 | |
| Jun 2023 | 4 | |
| Jul 2023 | 6 | |
| Aug 2023 | 4 | |
| Sep 2023 | 3 | |
| Oct 2023 | 0 | |
| Nov 2023 | 0 | |
| Dec 2023 | 2 | |
| Jan 2024 | 2 | |
| Feb 2024 | 0 | |
| Mar 2024 | 3 | |
| Apr 2024 | 0 | |
| May 2024 | 1 | |
| Jun 2024 | 0 | |
| Jul 2024 | 1 | |
| Aug 2024 | 4 | |
| Sep 2024 | 0 | |
| Oct 2024 | 0 | |
| Nov 2024 | 0 | |
| Dec 2024 | 1 | |
| Jan 2025 | 0 | |
| Feb 2025 | 0 | |
| Mar 2025 | 0 | |
| Apr 2025 | 0 | |
| May 2025 | 0 | |
| Jun 2025 | 0 | |
| Jul 2025 | 0 | |
| Aug 2025 | 1 | |
| Sep 2025 | 0 | |
| Oct 2025 | 1 | |
| Nov 2025 | 0 | |
| Dec 2025 | 0 | |
| Jan 2026 | 0 | |
| Feb 2026 | 0 | |
| Mar 2026 | 0 | |
| Apr 2026 | 0 | |
| May 2026 | 0 | |
| Jun 2026 | 1 | |
| Jul 2026 | 2 | |
| Aug 2026 | 0 | |
| Sep 2026 | 0 | |
| Oct 2026 | 0 | |
| Nov 2026 | 0 |
Reported volume per year
Gallons, summed from the 85 events that gave a number.
- Partly covered or sparse source
Source: MassDEP sewage notification portal. Covered 2022-06-30 to 2026-11-02.
Show table
| Year | Gallons | Events with a number | Events without | Coverage |
|---|---|---|---|---|
| 2022 | 16,358,700 | 5 | 0 | Partly covered or sparse source |
| 2023 | 176,905,391 | 43 | 0 | |
| 2024 | 70,993,105 | 26 | 0 | |
| 2025 | 12,262,047 | 5 | 0 | |
| 2026 | 4,999,300 | 6 | 0 |
Hours under advisory per year
Hours under advisory each year; 2026 to date.
- Advisory in effect
- Partly covered or sparse source
Official beach and cyanobacteria advisories are counted on water pages only.
Source: MassDEP sewage notification portal. Covered 2022-06-30 to 2026-11-02.
Show table
| Year | Hours under advisory | Share of the year | Coverage |
|---|---|---|---|
| 2022 | 199 | 2.3% | Partly covered or sparse source |
| 2023 | 904 | 10.3% | |
| 2024 | 606 | 6.9% | |
| 2025 | 99 | 1.1% | |
| 2026 | 133 | 1.8% |
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 | 6 | 4 |
| Feb | 0 | 4 |
| Mar | 7 | 4 |
| Apr | 1 | 4 |
| May | 3 | 4 |
| Jun | 8 | 5 |
| Jul | 16 | 5 |
| Aug | 26 | 5 |
| Sep | 7 | 5 |
| Oct | 3 | 5 |
| Nov | 0 | 5 |
| Dec | 8 | 4 |
Discharge events by outfall
The 5 outfalls with the most events of 5, 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 |
|---|---|
| GLSD004 ISLAND STREET | 33 |
| 001 | 21 |
| GLSD002 MERRIMACK STREET | 16 |
| GLSD006 GENERAL STREET GENERAL HOSPITAL | 10 |
| GLSD005 CANAL STREET CASEY BRIDGE | 5 |
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