City of Chicopee (Water Pollution Control)

CSO · Massachusetts · Chicopee

NPDES permit: MA0101508
Outfalls: 18 with coordinates in the registry (the state's layer lists 15)
Receiving waters: CHICOPEE R.; CONNECTICUT R.; WILLIMANSETT BK
Tracked waters: Chicopee River, MA, Connecticut River, MA
Events tracked: 983 discharges · latest August 2026
Volume reported: 363,146,454 gallons across the 581 discharges that give a volume (402 without one)

Source: discharger record from the project's research and EPA ECHO (dischargers.json); counts from the 983 event records below, as of 2026-11-02 11:56 UTC.

How it tells the public

Chicopee 'Combined Sewer Overflow Public Notification' page https://www.chicopeema.gov/936/Combined-Sewer-Overflow-Public-Notificat: English/Spanish check-box PDF notices (start, duration and volume often 'unknown'); page says it is updated within 18 hours on business days, but the newest notice is 2025-07-27. Email list only by emailing the project supervisor (not done). Older PDFs at /1051/CSO-Data-2022-2024; 'Unauthorized Discharge Notifications' page lists 6 dry-weather/unauthorized discharges 2022-2023. MassDEP portal PNs filed 4-7 days after events; no portal records Aug-Oct 2026.

Outfall layer (source data)

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.

18 outfalls in the registry

003 POWER LINE ROW S OF JAMES ST · CSO · Connecticut River
004 RIVERVIEW PUMP STATION · CSO · Connecticut River
005 LESLIE ST PUMP STATION · CSO · Connecticut River
007 JONES FERRY RD PUMP STATION · TCS · Connecticut River
008 EASEMENT OF JONES FERRY RD PUMP STATION · CSO · Connecticut River
009 PADEREWSKI ST PUMP STATION · CSO · Connecticut River
024 FRONT AND DEPOT ST. AREA · CSO · Connecticut River
026 BELL & FRONT ST. · CSO · CHICOPEE RIVER
027 PARKING LOT, TOPORS GARAGE & FRONT ST · CSO · CHICOPEE RIVER
034 GRATTAN ST & HEARTHSTONE TER · CSO · CHICOPEE RIVER
037 EAST MAIN ST #227 · CSO · CHICOPEE RIVER
040 West Main and Oak Streets · CSO · CHICOPEE RIVER
042 CHICOPEE ST NEAR 116 BRIDGE MANHOLE #11 · CSO · WILLLIMANSETT BROOK
32A MAIN STREET WEST OF DEADY MEMORIAL BRIDGE · CSO · CHICOPEE RIVER
32B ROBERTS POND · CSO · CHICOPEE RIVER · not on a tracked water
006 Call Street P.S. · CLS · Connecticut River
029 Chicopee Electric Light Compound-West · CLS · Chicopee River
031 Off Front Street between Wheatland and Ellerton Street · CLS · Chicopee River

Source: EPA ECHO CSO outfall inventory matched to waters (data/outfalls-ne.json).

Event history

Events reported for City of Chicopee (Water Pollution Control), newest first
Start	End	Water	Outfall	Type	Volume	Source	Links
August 2026	September 2026	“CHICOPEE RIVER” (not placed)	32B ROBERTS POND	Combined sewer overflow	“6 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:32B:2026-09, reported Oct 7, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), August 2026 · Map
August 2026	September 2026	Chicopee River, MA	32A MAIN STREET WEST OF DEADY MEMORIAL BRIDGE	Combined sewer overflow	“2 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:32A:2026-09, reported Oct 7, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), August 2026 · Map
August 2026	September 2026	Chicopee River, MA	037 EAST MAIN ST #227	Combined sewer overflow	“1 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:037:2026-09, reported Oct 7, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), August 2026 · Map
August 2026	September 2026	Chicopee River, MA	034 GRATTAN ST & HEARTHSTONE TER	Combined sewer overflow	“3 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:034:2026-09, reported Oct 7, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), August 2026 · Map
August 2026	September 2026	Chicopee River, MA	027 PARKING LOT, TOPORS GARAGE & FRONT ST	Combined sewer overflow	“5 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:027:2026-09, reported Oct 7, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), August 2026 · Map
August 2026	September 2026	Connecticut River, MA	024 FRONT AND DEPOT ST. AREA	Combined sewer overflow	“9 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:024:2026-09, reported Oct 7, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), August 2026 · Map
August 2026	September 2026	Connecticut River, MA	009 PADEREWSKI ST PUMP STATION	Combined sewer overflow	“3 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:009:2026-09, reported Oct 7, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), August 2026 · Map
August 2026	September 2026	Connecticut River, MA	005 LESLIE ST PUMP STATION	Combined sewer overflow	“3 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:005:2026-09, reported Oct 7, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), August 2026 · Map
August 2026	September 2026	Connecticut River, MA	004 RIVERVIEW PUMP STATION	Combined sewer overflow	“2 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:004:2026-09, reported Oct 7, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), August 2026 · Map
August 2026	September 2026	Connecticut River, MA	003 POWER LINE ROW S OF JAMES ST	Combined sewer overflow	“4 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:003:2026-09, reported Oct 7, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), August 2026 · Map
July 2026	August 2026	“CHICOPEE RIVER” (not placed)	32B ROBERTS POND	Combined sewer overflow	“8 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:32B:2026-08, reported Sep 2, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), July 2026 · Map
July 2026	August 2026	Chicopee River, MA	32A MAIN STREET WEST OF DEADY MEMORIAL BRIDGE	Combined sewer overflow	“5 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:32A:2026-08, reported Sep 2, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), July 2026 · Map
July 2026	August 2026	Chicopee River, MA	042 CHICOPEE ST NEAR 116 BRIDGE MANHOLE #11	Combined sewer overflow	“1 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:042:2026-08, reported Sep 2, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), July 2026 · Map
July 2026	August 2026	Chicopee River, MA	037 EAST MAIN ST #227	Combined sewer overflow	“3 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:037:2026-08, reported Sep 2, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), July 2026 · Map
July 2026	August 2026	Chicopee River, MA	034 GRATTAN ST & HEARTHSTONE TER	Combined sewer overflow	“3 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:034:2026-08, reported Sep 2, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), July 2026 · Map
July 2026	August 2026	Chicopee River, MA	027 PARKING LOT, TOPORS GARAGE & FRONT ST	Combined sewer overflow	“8 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:027:2026-08, reported Sep 2, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), July 2026 · Map
July 2026	August 2026	Chicopee River, MA	026 BELL & FRONT ST.	Combined sewer overflow	“2 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:026:2026-08, reported Sep 2, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), July 2026 · Map
July 2026	August 2026	Connecticut River, MA	024 FRONT AND DEPOT ST. AREA	Combined sewer overflow	“9 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:024:2026-08, reported Sep 2, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), July 2026 · Map
July 2026	August 2026	Connecticut River, MA	009 PADEREWSKI ST PUMP STATION	Combined sewer overflow	“2 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:009:2026-08, reported Sep 2, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), July 2026 · Map
July 2026	August 2026	Connecticut River, MA	007 JONES FERRY RD PUMP STATION	Combined sewer overflow	“1 discharge event(s); 4 hr of discharge; .34 MGD (TOTAL; monthly-total semantics unconfirmed)”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:007:2026-08:2, reported Sep 2, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), July 2026 · Map
July 2026	August 2026	Connecticut River, MA	007 JONES FERRY RD PUMP STATION	Combined sewer overflow	“1 discharge event(s); 4 hr of discharge; 0 MGD (TOTAL; monthly-total semantics unconfirmed)”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:007:2026-08:1, reported Sep 2, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), July 2026 · Map
July 2026	August 2026	Connecticut River, MA	005 LESLIE ST PUMP STATION	Combined sewer overflow	“3 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:005:2026-08, reported Sep 2, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), July 2026 · Map
July 2026	August 2026	Connecticut River, MA	004 RIVERVIEW PUMP STATION	Combined sewer overflow	“3 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:004:2026-08, reported Sep 2, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), July 2026 · Map
July 2026	August 2026	Connecticut River, MA	003 POWER LINE ROW S OF JAMES ST	Combined sewer overflow	“2 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:003:2026-08, reported Sep 2, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), July 2026 · Map
Jul 22, 2026, 12:00 AM EDT	Jul 22, 2026, 12:00 AM EDT	Chicopee River, MA	CHI37 EAST MAIN ST #227	Combined sewer overflow	0 gal	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 75fe018f-a778-4319-965a-835a441e8edf, published Sep 1, 2026, 10:13 AM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jul 22, 2026, 12:00 AM EDT · Map
Jul 22, 2026, 12:00 AM EDT	Jul 22, 2026, 12:00 AM EDT	Chicopee River, MA	CHI34 GRATTAN ST & HEARTHSTONE TER	Combined sewer overflow	0 gal	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record ec9fc0bc-820e-49cc-a466-7ca2ba26b4f3, published Sep 1, 2026, 10:12 AM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jul 22, 2026, 12:00 AM EDT · Map
Jul 22, 2026, 12:00 AM EDT	Jul 22, 2026, 2:15 AM EDT	Chicopee River, MA	CHI32B MAIN STREET WEST OF DEADY MEMORIAL BRIDGE	Combined sewer overflow	5,190 gal	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record f46a4b0a-2c31-421e-ad28-195a0d9ddee2, published Sep 1, 2026, 10:11 AM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jul 22, 2026, 12:00 AM EDT · Map
Jul 22, 2026, 12:00 AM EDT	Jul 22, 2026, 12:00 AM EDT	Chicopee River, MA	CHI27 PARKING LOT, TOPORS GARAGE & FRONT ST	Combined sewer overflow	0 gal	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 4055ea5c-17c0-48d3-b01a-ddda040f6aaf, published Sep 1, 2026, 10:10 AM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jul 22, 2026, 12:00 AM EDT · Map
Jul 22, 2026, 12:00 AM EDT	Jul 22, 2026, 1:45 AM EDT	Connecticut River, MA	CHI24 FRONT AND DEPOT ST. AREA	Combined sewer overflow	185,999 gal	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record d1621784-db47-4c81-bc97-328f0e974793, published Sep 1, 2026, 10:09 AM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jul 22, 2026, 12:00 AM EDT · Map
Jul 22, 2026, 12:00 AM EDT	Jul 22, 2026, 12:45 AM EDT	Connecticut River, MA	CHI07 JONES FERRY RD PUMP STATION	Combined sewer overflow	1,588 gal	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record bcfb5402-95a2-4b64-a7a0-73f161d7fda6, published Sep 1, 2026, 10:08 AM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jul 22, 2026, 12:00 AM EDT · Map
Jul 22, 2026, 12:00 AM EDT	Jul 22, 2026, 12:00 AM EDT	Connecticut River, MA	CHI05 LESLIE ST PUMP STATION	Combined sewer overflow	0 gal	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 4a12ca27-e11a-4558-9f63-36bb281005d8, published Sep 1, 2026, 10:08 AM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jul 22, 2026, 12:00 AM EDT · Map
Jul 22, 2026, 12:00 AM EDT	Jul 22, 2026, 1:45 AM EDT	Connecticut River, MA	CHI03 POWER LINE ROW S OF JAMES ST	Combined sewer overflow	238,460 gal	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 56c8a08e-324d-4d1f-804d-f9995de9b67c, published Sep 1, 2026, 10:07 AM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jul 22, 2026, 12:00 AM EDT · Map
Jul 22, 2026, 12:00 AM EDT	Jul 22, 2026, 12:00 AM EDT	Chicopee River, MA	CHI37 EAST MAIN ST #227	Combined sewer overflowrevised	not reported	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 0e46b97f-acab-404e-87b1-81b8ccaf958b, published Jul 29, 2026, 12:48 PM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jul 22, 2026, 12:00 AM EDT · Map
Jul 22, 2026, 12:00 AM EDT	Jul 22, 2026, 12:00 AM EDT	Chicopee River, MA	CHI34 GRATTAN ST & HEARTHSTONE TER	Combined sewer overflowrevised	not reported	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record c96d7e2a-79c9-4250-b2d0-95afa5cff781, published Jul 29, 2026, 12:47 PM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jul 22, 2026, 12:00 AM EDT · Map
Jul 22, 2026, 12:00 AM EDT	Jul 22, 2026, 2:15 AM EDT	Chicopee River, MA	CHI32B MAIN STREET WEST OF DEADY MEMORIAL BRIDGE	Combined sewer overflowrevised	not reported	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 23bc92d0-3341-401a-8738-2289977bf703, published Jul 29, 2026, 12:46 PM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jul 22, 2026, 12:00 AM EDT · Map
Jul 22, 2026, 12:00 AM EDT	Jul 22, 2026, 12:00 AM EDT	Chicopee River, MA	CHI27 PARKING LOT, TOPORS GARAGE & FRONT ST	Combined sewer overflowrevised	not reported	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record c74c94b8-1575-46d5-805c-ef311db3cee7, published Jul 29, 2026, 12:45 PM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jul 22, 2026, 12:00 AM EDT · Map
Jul 22, 2026, 12:00 AM EDT	Jul 22, 2026, 1:45 AM EDT	Connecticut River, MA	CHI24 FRONT AND DEPOT ST. AREA	Combined sewer overflowrevised	not reported	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record eb82fe69-3eb3-4f7b-a278-307b2b1f8bdb, published Jul 29, 2026, 12:45 PM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jul 22, 2026, 12:00 AM EDT · Map
Jul 22, 2026, 12:00 AM EDT	Jul 22, 2026, 12:45 AM EDT	Connecticut River, MA	CHI07 JONES FERRY RD PUMP STATION	Combined sewer overflowrevised	not reported	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 97158b59-1b7a-43ac-9cfa-c423c8124d2b, published Jul 29, 2026, 12:44 PM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jul 22, 2026, 12:00 AM EDT · Map
Jul 22, 2026, 12:00 AM EDT	Jul 22, 2026, 12:00 AM EDT	Connecticut River, MA	CHI05 LESLIE ST PUMP STATION	Combined sewer overflowrevised	not reported	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 2e32d405-85ac-4a78-87f2-e98adce6b294, published Jul 29, 2026, 12:43 PM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jul 22, 2026, 12:00 AM EDT · Map
Jul 22, 2026, 12:00 AM EDT	Jul 22, 2026, 1:45 AM EDT	Connecticut River, MA	CHI03 POWER LINE ROW S OF JAMES ST	Combined sewer overflowrevised	not reported	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record f2b7e500-cf15-4e78-a3f3-a8654d7debfb, published Jul 29, 2026, 12:42 PM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jul 22, 2026, 12:00 AM EDT · Map
Jul 2, 2026, 12:00 AM EDT	Jul 2, 2026, 12:00 AM EDT	Chicopee River, MA	CHI34 GRATTAN ST & HEARTHSTONE TER	Combined sewer overflow	0 gal	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 9d2ca31b-091d-4041-9b1e-c9bcf45f9a85, published Sep 1, 2026, 10:05 AM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jul 2, 2026, 12:00 AM EDT · Map
Jul 2, 2026, 12:00 AM EDT	Jul 2, 2026, 2:15 AM EDT	Chicopee River, MA	CHI32B MAIN STREET WEST OF DEADY MEMORIAL BRIDGE	Combined sewer overflow	5,190 gal	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record cc337bff-0687-44b2-af9c-4bf43e1bc581, published Sep 1, 2026, 10:03 AM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jul 2, 2026, 12:00 AM EDT · Map
Jul 2, 2026, 12:00 AM EDT	Jul 2, 2026, 12:00 AM EDT	Chicopee River, MA	CHI27 PARKING LOT, TOPORS GARAGE & FRONT ST	Combined sewer overflow	0 gal	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 86437da6-3e74-45cc-85c7-f969a222ede5, published Sep 1, 2026, 10:02 AM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jul 2, 2026, 12:00 AM EDT · Map
Jul 2, 2026, 12:00 AM EDT	Jul 2, 2026, 1:00 AM EDT	Connecticut River, MA	CHI03 POWER LINE ROW S OF JAMES ST	Combined sewer overflow	89,902 gal	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 66b99bf3-ccec-4380-af11-d47ee5b4c8fb, published Sep 1, 2026, 9:59 AM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jul 2, 2026, 12:00 AM EDT · Map
Jul 2, 2026, 12:00 AM EDT	Jul 2, 2026, 12:00 AM EDT	Chicopee River, MA	CHI34 GRATTAN ST & HEARTHSTONE TER	Combined sewer overflowrevised	not reported	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 65ccb0ef-0cde-418d-90d2-48fdffed271a, published Jul 2, 2026, 11:34 AM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jul 2, 2026, 12:00 AM EDT · Map
Jul 2, 2026, 12:00 AM EDT	Jul 2, 2026, 2:15 AM EDT	Chicopee River, MA	CHI32B MAIN STREET WEST OF DEADY MEMORIAL BRIDGE	Combined sewer overflowrevised	not reported	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 8b4073aa-4e54-41e0-89a1-25f02d00ef9f, published Jul 2, 2026, 11:33 AM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jul 2, 2026, 12:00 AM EDT · Map
Jul 2, 2026, 12:00 AM EDT	Jul 2, 2026, 12:00 AM EDT	Chicopee River, MA	CHI27 PARKING LOT, TOPORS GARAGE & FRONT ST	Combined sewer overflowrevised	not reported	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 9fad036b-264d-4542-8cd7-978417a93920, published Jul 2, 2026, 11:32 AM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jul 2, 2026, 12:00 AM EDT · Map
Jul 2, 2026, 12:00 AM EDT	Jul 2, 2026, 1:00 AM EDT	Connecticut River, MA	CHI03 POWER LINE ROW S OF JAMES ST	Combined sewer overflowrevised	not reported	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 6b57838f-a561-4c9d-9b0e-28901522a479, published Jul 2, 2026, 11:31 AM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jul 2, 2026, 12:00 AM EDT · Map
June 2026	July 2026	“CHICOPEE RIVER” (not placed)	32B ROBERTS POND	Combined sewer overflow	“13 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:32B:2026-07, reported Aug 5, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), June 2026 · Map
June 2026	July 2026	Chicopee River, MA	32A MAIN STREET WEST OF DEADY MEMORIAL BRIDGE	Combined sewer overflow	“5 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:32A:2026-07, reported Aug 5, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), June 2026 · Map
June 2026	July 2026	Chicopee River, MA	042 CHICOPEE ST NEAR 116 BRIDGE MANHOLE #11	Combined sewer overflow	“1 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:042:2026-07, reported Aug 5, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), June 2026 · Map
June 2026	July 2026	Chicopee River, MA	037 EAST MAIN ST #227	Combined sewer overflow	“2 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:037:2026-07, reported Aug 5, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), June 2026 · Map
June 2026	July 2026	Chicopee River, MA	034 GRATTAN ST & HEARTHSTONE TER	Combined sewer overflow	“6 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:034:2026-07, reported Aug 5, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), June 2026 · Map
June 2026	July 2026	Chicopee River, MA	027 PARKING LOT, TOPORS GARAGE & FRONT ST	Combined sewer overflow	“7 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:027:2026-07, reported Aug 5, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), June 2026 · Map
June 2026	July 2026	Chicopee River, MA	026 BELL & FRONT ST.	Combined sewer overflow	“1 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:026:2026-07, reported Aug 5, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), June 2026 · Map
June 2026	July 2026	Connecticut River, MA	024 FRONT AND DEPOT ST. AREA	Combined sewer overflow	“10 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:024:2026-07, reported Aug 5, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), June 2026 · Map
June 2026	July 2026	Connecticut River, MA	009 PADEREWSKI ST PUMP STATION	Combined sewer overflow	“2 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:009:2026-07, reported Aug 5, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), June 2026 · Map
June 2026	July 2026	Connecticut River, MA	007 JONES FERRY RD PUMP STATION	Combined sewer overflow	“1 discharge event(s); 5 hr of discharge; 1.02 MGD (TOTAL; monthly-total semantics unconfirmed)”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:007:2026-07:2, reported Aug 5, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), June 2026 · Map
June 2026	July 2026	Connecticut River, MA	007 JONES FERRY RD PUMP STATION	Combined sewer overflow	“1 discharge event(s); 5 hr of discharge; 5.75 MGD (TOTAL; monthly-total semantics unconfirmed)”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:007:2026-07:1, reported Aug 5, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), June 2026 · Map
June 2026	July 2026	Connecticut River, MA	005 LESLIE ST PUMP STATION	Combined sewer overflow	“5 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:005:2026-07, reported Aug 5, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), June 2026 · Map
June 2026	July 2026	Connecticut River, MA	004 RIVERVIEW PUMP STATION	Combined sewer overflow	“2 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:004:2026-07, reported Aug 5, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), June 2026 · Map
June 2026	July 2026	Connecticut River, MA	003 POWER LINE ROW S OF JAMES ST	Combined sewer overflow	“7 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:003:2026-07, reported Aug 5, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), June 2026 · Map
Jun 30, 2026, 12:00 AM EDT	Jun 30, 2026, 1:15 AM EDT	Chicopee River, MA	CHI34 GRATTAN ST & HEARTHSTONE TER	Combined sewer overflow	9,336 gal	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record e9bf4a27-8875-49c7-a379-95ebefe89a20, published Sep 1, 2026, 9:55 AM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jun 30, 2026, 12:00 AM EDT · Map
Jun 30, 2026, 12:00 AM EDT	Jun 30, 2026, 3:30 AM EDT	Chicopee River, MA	CHI32B MAIN STREET WEST OF DEADY MEMORIAL BRIDGE	Combined sewer overflow	23,148 gal	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record b8855f1c-4773-4553-9d68-dce373ac7d88, published Sep 1, 2026, 9:54 AM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jun 30, 2026, 12:00 AM EDT · Map
Jun 30, 2026, 12:00 AM EDT	Jun 30, 2026, 2:00 AM EDT	Chicopee River, MA	CHI27 PARKING LOT, TOPORS GARAGE & FRONT ST	Combined sewer overflow	151,932 gal	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 83f7bb19-64ce-479f-82dd-863b7eb7e0bd, published Sep 1, 2026, 9:53 AM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jun 30, 2026, 12:00 AM EDT · Map
Jun 30, 2026, 12:00 AM EDT	Jun 30, 2026, 3:45 AM EDT	Connecticut River, MA	CHI24 FRONT AND DEPOT ST. AREA	Combined sewer overflow	750,936 gal	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record b955f987-d33c-4408-9ea3-0ff1d61012af, published Sep 1, 2026, 9:49 AM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jun 30, 2026, 12:00 AM EDT · Map
Jun 30, 2026, 12:00 AM EDT	Jun 30, 2026, 2:45 AM EDT	Connecticut River, MA	CHI05 LESLIE ST PUMP STATION	Combined sewer overflow	57,781 gal	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record b8ef7e83-ff84-40a3-a5a4-6c5677a4b988, published Sep 1, 2026, 9:47 AM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jun 30, 2026, 12:00 AM EDT · Map
Jun 30, 2026, 12:00 AM EDT	Jun 30, 2026, 3:30 AM EDT	Connecticut River, MA	CHI03 POWER LINE ROW S OF JAMES ST	Combined sewer overflow	1.07 million gal	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 6c8fca4e-be7a-4174-9653-c7c3d01d1535, published Sep 1, 2026, 9:46 AM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jun 30, 2026, 12:00 AM EDT · Map
Jun 30, 2026, 12:00 AM EDT	Jun 30, 2026, 1:15 AM EDT	Chicopee River, MA	CHI34 GRATTAN ST & HEARTHSTONE TER	Combined sewer overflowrevised	not reported	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 7b5f2a4b-26aa-42ff-a060-eee58863fad0, published Jul 1, 2026, 1:36 PM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jun 30, 2026, 12:00 AM EDT · Map
Jun 30, 2026, 12:00 AM EDT	Jun 30, 2026, 3:30 AM EDT	Chicopee River, MA	CHI32B MAIN STREET WEST OF DEADY MEMORIAL BRIDGE	Combined sewer overflowrevised	not reported	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 09cd77b6-8683-4222-aecc-54b4d0e0f0f1, published Jul 1, 2026, 1:35 PM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jun 30, 2026, 12:00 AM EDT · Map
Jun 30, 2026, 12:00 AM EDT	Jun 30, 2026, 2:00 AM EDT	Chicopee River, MA	CHI27 PARKING LOT, TOPORS GARAGE & FRONT ST	Combined sewer overflowrevised	not reported	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record ad36361b-7534-4fba-89f8-6695ec6e00fe, published Jul 1, 2026, 1:34 PM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jun 30, 2026, 12:00 AM EDT · Map
Jun 30, 2026, 12:00 AM EDT	Jun 30, 2026, 3:45 AM EDT	Connecticut River, MA	CHI24 FRONT AND DEPOT ST. AREA	Combined sewer overflowrevised	not reported	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record cf9c67ba-1d2a-489f-b1ff-1c00fdf1ae54, published Jul 1, 2026, 1:30 PM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jun 30, 2026, 12:00 AM EDT · Map
Jun 30, 2026, 12:00 AM EDT	Jun 30, 2026, 2:45 AM EDT	Connecticut River, MA	CHI05 LESLIE ST PUMP STATION	Combined sewer overflowrevised	not reported	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record d1e53722-e7ac-40d9-9657-a6e580e1af00, published Jul 1, 2026, 1:29 PM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jun 30, 2026, 12:00 AM EDT · Map
Jun 30, 2026, 12:00 AM EDT	Jun 30, 2026, 3:30 AM EDT	Connecticut River, MA	CHI03 POWER LINE ROW S OF JAMES ST	Combined sewer overflowrevised	not reported	CITY OF CHICOPEE (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 3ef20f3e-7ff3-492c-8ea1-66528547b027, published Jul 1, 2026, 1:25 PM EDT, retrieved 2026-11-02 10:58 UTC · notice	Event: Combined sewer overflow, CITY OF CHICOPEE, Jun 30, 2026, 12:00 AM EDT · Map
May 2026	June 2026	“CHICOPEE RIVER” (not placed)	32B ROBERTS POND	Combined sewer overflow	“8 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:32B:2026-06, reported Jul 8, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), May 2026 · Map
May 2026	June 2026	Chicopee River, MA	32A MAIN STREET WEST OF DEADY MEMORIAL BRIDGE	Combined sewer overflow	“2 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:32A:2026-06, reported Jul 8, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), May 2026 · Map
May 2026	June 2026	Chicopee River, MA	037 EAST MAIN ST #227	Combined sewer overflow	“1 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:037:2026-06, reported Jul 8, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), May 2026 · Map
May 2026	June 2026	Chicopee River, MA	034 GRATTAN ST & HEARTHSTONE TER	Combined sewer overflow	“3 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:034:2026-06, reported Jul 8, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), May 2026 · Map
May 2026	June 2026	Chicopee River, MA	027 PARKING LOT, TOPORS GARAGE & FRONT ST	Combined sewer overflow	“3 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:027:2026-06, reported Jul 8, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), May 2026 · Map
May 2026	June 2026	Connecticut River, MA	024 FRONT AND DEPOT ST. AREA	Combined sewer overflow	“7 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:024:2026-06, reported Jul 8, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), May 2026 · Map
May 2026	June 2026	Connecticut River, MA	009 PADEREWSKI ST PUMP STATION	Combined sewer overflow	“1 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:009:2026-06, reported Jul 8, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), May 2026 · Map
May 2026	June 2026	Connecticut River, MA	007 JONES FERRY RD PUMP STATION	Combined sewer overflow	“1 discharge event(s); 0.66 hr of discharge; .34 MGD (TOTAL; monthly-total semantics unconfirmed)”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:007:2026-06:2, reported Jul 8, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), May 2026 · Map
May 2026	June 2026	Connecticut River, MA	007 JONES FERRY RD PUMP STATION	Combined sewer overflow	“1 discharge event(s); 0.66 hr of discharge; .08 MGD (TOTAL; monthly-total semantics unconfirmed)”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:007:2026-06:1, reported Jul 8, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), May 2026 · Map
May 2026	June 2026	Connecticut River, MA	005 LESLIE ST PUMP STATION	Combined sewer overflow	“3 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:005:2026-06, reported Jul 8, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), May 2026 · Map
May 2026	June 2026	Connecticut River, MA	004 RIVERVIEW PUMP STATION	Combined sewer overflow	“1 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:004:2026-06, reported Jul 8, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), May 2026 · Map
May 2026	June 2026	Connecticut River, MA	003 POWER LINE ROW S OF JAMES ST	Combined sewer overflow	“6 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:003:2026-06, reported Jul 8, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	Event: Combined sewer overflow, City of Chicopee (Water Pollution Control), May 2026 · Map
April 2026	May 2026	“CHICOPEE RIVER” (not placed)	32B ROBERTS POND	Combined sewer overflow	“9 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:32B:2026-05, reported Jun 10, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	record below · Map
Full record (older than 180 days, so no page of its own) This record in the archive list
April 2026	May 2026	Chicopee River, MA	32A MAIN STREET WEST OF DEADY MEMORIAL BRIDGE	Combined sewer overflow	“2 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:32A:2026-05, reported Jun 10, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	record below · Map
Full record (older than 180 days, so no page of its own) This record in the archive list
April 2026	May 2026	Chicopee River, MA	034 GRATTAN ST & HEARTHSTONE TER	Combined sewer overflow	“2 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:034:2026-05, reported Jun 10, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	record below · Map
Full record (older than 180 days, so no page of its own) This record in the archive list
April 2026	May 2026	Chicopee River, MA	027 PARKING LOT, TOPORS GARAGE & FRONT ST	Combined sewer overflow	“3 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:027:2026-05, reported Jun 10, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	record below · Map
Full record (older than 180 days, so no page of its own) This record in the archive list
April 2026	May 2026	Connecticut River, MA	024 FRONT AND DEPOT ST. AREA	Combined sewer overflow	“7 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:024:2026-05, reported Jun 10, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	record below · Map
Full record (older than 180 days, so no page of its own) This record in the archive list
April 2026	May 2026	Connecticut River, MA	007 JONES FERRY RD PUMP STATION	Combined sewer overflow	“0 discharge event(s); 0 hr of discharge; .22 MGD (TOTAL; monthly-total semantics unconfirmed)”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:007:2026-05:2, reported Jun 10, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	record below · Map
Full record (older than 180 days, so no page of its own) This record in the archive list
April 2026	May 2026	Connecticut River, MA	007 JONES FERRY RD PUMP STATION	Combined sewer overflow	“0 discharge event(s); 0 hr of discharge; .39 MGD (TOTAL; monthly-total semantics unconfirmed)”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:007:2026-05:1, reported Jun 10, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	record below · Map
Full record (older than 180 days, so no page of its own) This record in the archive list
April 2026	May 2026	Connecticut River, MA	005 LESLIE ST PUMP STATION	Combined sewer overflow	“4 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:005:2026-05, reported Jun 10, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	record below · Map
Full record (older than 180 days, so no page of its own) This record in the archive list
April 2026	May 2026	Connecticut River, MA	003 POWER LINE ROW S OF JAMES ST	Combined sewer overflow	“2 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:003:2026-05, reported Jun 10, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	record below · Map
Full record (older than 180 days, so no page of its own) This record in the archive list
March 2026	April 2026	“CHICOPEE RIVER” (not placed)	32B ROBERTS POND	Combined sewer overflow	“9 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:32B:2026-04, reported May 6, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	record below · Map
Full record (older than 180 days, so no page of its own) This record in the archive list
March 2026	April 2026	Chicopee River, MA	32A MAIN STREET WEST OF DEADY MEMORIAL BRIDGE	Combined sewer overflow	“2 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:32A:2026-04, reported May 6, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	record below · Map
Full record (older than 180 days, so no page of its own) This record in the archive list
March 2026	April 2026	Chicopee River, MA	037 EAST MAIN ST #227	Combined sewer overflow	“3 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:037:2026-04, reported May 6, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	record below · Map
Full record (older than 180 days, so no page of its own) This record in the archive list
March 2026	April 2026	Chicopee River, MA	034 GRATTAN ST & HEARTHSTONE TER	Combined sewer overflow	“2 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:034:2026-04, reported May 6, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	record below · Map
Full record (older than 180 days, so no page of its own) This record in the archive list
March 2026	April 2026	Chicopee River, MA	027 PARKING LOT, TOPORS GARAGE & FRONT ST	Combined sewer overflow	“8 discharge event(s); NODI duration Q, flow Q”	EPA ECHO Discharge Monitoring Reports (permittee-reported monthly CSO figures) via ECHO Effluent Charts REST services (per-permit DMR data incl. monthly CSO event counts, duration, volume per outfall), record MA0101508:027:2026-04, reported May 6, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice	record below · Map
Full record (older than 180 days, so no page of its own) This record in the archive list

Showing the newest 100 events of 1,545 events. See them all with filters.

History

Discharge events, last 12 months18Dec 2025 to Nov 2026
Days with a discharge, last 12 months3Dec 2025 to Nov 2026
Hours under advisory, last 12 months149Dec 2025 to Nov 2026; on this discharger's reports
2026 season under advisory3.4%May to October; 149 h

Discharge events per month

581 events, Jan 2022 to Nov 2026. Counted from 581 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. Some dischargers here report only monthly or yearly totals; those are shown under reported totals, not counted here.

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

Show table

Discharge events per month
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	37	0	2	39	Verified or annual reports
Aug 2022	24	0	1	25	Verified or annual reports
Sep 2022	33	0	2	35	Verified or annual reports
Oct 2022	27	0	0	27	Verified or annual reports
Nov 2022	21	0	0	21	Verified or annual reports
Dec 2022	5	0	0	5	Verified or annual reports
Jan 2023	15	0	0	15	Verified or annual reports
Feb 2023	0	1	0	1	Verified or annual reports
Mar 2023	3	1	0	4	Verified or annual reports
Apr 2023	17	0	2	19	Verified or annual reports
May 2023	10	0	1	11	Verified or annual reports
Jun 2023	41	0	1	42	Verified or annual reports
Jul 2023	36	0	4	40	Verified or annual reports
Aug 2023	14	0	0	14	Verified or annual reports
Sep 2023	18	0	2	20	Verified or annual reports
Oct 2023	0	0	0	0
Nov 2023	6	0	0	6	Verified or annual reports
Dec 2023	29	0	2	31	Verified or annual reports
Jan 2024	35	0	1	36	Verified or annual reports
Feb 2024	7	0	1	8	Verified or annual reports
Mar 2024	38	0	3	41	Verified or annual reports
Apr 2024	7	0	0	7	Verified or annual reports
May 2024	9	0	0	9	Verified or annual reports
Jun 2024	18	0	1	19	Verified or annual reports
Jul 2024	8	0	1	9	Verified or annual reports
Aug 2024	0	0	1	1	Verified or annual reports
Sep 2024	0	0	0	0
Oct 2024	0	0	0	0
Nov 2024	0	0	0	0
Dec 2024	17	0	1	18	Verified or annual reports
Jan 2025	0	0	0	0
Feb 2025	0	0	0	0
Mar 2025	28	1	1	30	Verified or annual reports
Apr 2025	0	0	0	0
May 2025	11	0	1	12	Verified or annual reports
Jun 2025	0	0	0	0
Jul 2025	17	0	1	18	Verified or annual reports
Aug 2025	0	0	0	0
Sep 2025	0	0	0	0
Oct 2025	0	0	0	0
Nov 2025	0	0	0	0
Dec 2025	0	0	0	0
Jan 2026	0	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	6	0	0	6	Verified or annual reports
Jul 2026	12	0	0	12	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. 1 discharge events have no reported end and no ongoing status; under the status rules they set caution, not an advisory, and add no hours here. Official beach and cyanobacteria advisories are counted on water pages only. MassDEP portal records begin 2022-06-30. Verified Data Reports arrive after the month ends, so the latest months count public notices.

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

Show table

Hours under advisory per month
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	178	178	744
Aug 2022	150	150	744
Sep 2022	167	167	720
Oct 2022	196	196	744
Nov 2022	132	132	720
Dec 2022	81	81	744
Jan 2023	115	115	744
Feb 2023	56	56	672
Mar 2023	89	89	744
Apr 2023	129	129	720
May 2023	60	60	744
Jun 2023	251	251	720
Jul 2023	350	350	744
Aug 2023	102	102	744
Sep 2023	133	133	720
Oct 2023	17	17	744
Nov 2023	53	53	720
Dec 2023	179	179	744
Jan 2024	185	185	744
Feb 2024	48	48	696
Mar 2024	242	242	744
Apr 2024	148	148	720
May 2024	54	54	744
Jun 2024	111	111	720
Jul 2024	50	50	744
Aug 2024	49	49	744
Sep 2024	0	0	720
Oct 2024	0	0	744
Nov 2024	0	0	720
Dec 2024	105	105	744
Jan 2025	0	0	744
Feb 2025	0	0	672
Mar 2025	217	217	744
Apr 2025	27	27	720
May 2025	24	24	744
Jun 2025	40	40	720
Jul 2025	103	103	744
Aug 2025	0	0	744
Sep 2025	0	0	720
Oct 2025	0	0	744
Nov 2025	0	0	720
Dec 2025	0	0	744
Jan 2026	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	24	24	720
Jul 2026	125	125	744
Aug 2026	0	0	744
Sep 2026	0	0	720
Oct 2026	0	0	744
Nov 2026	0	0	32

Days with a discharge per month

A day counts when any counted discharge was under way on it (start to reported end, local time); an event with no end counts its start day.

No source
Partly covered or sparse source

No source covers 2022-01 to 2022-05.

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

Show table

Days with a discharge per month
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	4
Aug 2022	3
Sep 2022	3
Oct 2022	4
Nov 2022	3
Dec 2022	1
Jan 2023	2
Feb 2023	1
Mar 2023	2
Apr 2023	2
May 2023	1
Jun 2023	5
Jul 2023	12
Aug 2023	2
Sep 2023	3
Oct 2023	0
Nov 2023	1
Dec 2023	3
Jan 2024	4
Feb 2024	1
Mar 2024	4
Apr 2024	3
May 2024	1
Jun 2024	2
Jul 2024	1
Aug 2024	1
Sep 2024	0
Oct 2024	0
Nov 2024	0
Dec 2024	2
Jan 2025	0
Feb 2025	0
Mar 2025	5
Apr 2025	0
May 2025	1
Jun 2025	0
Jul 2025	2
Aug 2025	0
Sep 2025	0
Oct 2025	0
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 581 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

Reported volume per year
Year	Gallons	Events with a number	Coverage
2022	63,791,716	152	Partly covered or sparse source
2023	194,315,769	203
2024	74,947,016	148
2025	27,503,509	60
2026	2,588,444	18

Hours under advisory per year

Hours under advisory each year; 2026 to date.

Advisory in effect
Partly covered or sparse source

1 discharge events have no reported end and no ongoing status; under the status rules they set caution, not an advisory, and add no hours here. Official beach and cyanobacteria advisories are counted on water pages only.

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

Show table

Hours under advisory per year
Year	Hours under advisory	Share of the year	Coverage
2022	903	10.3%	Partly covered or sparse source
2023	1,533	17.5%
2024	991	11.3%
2025	410	4.7%
2026	149	2.0%

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). 1 discharge events have no reported end and no ongoing status; under the status rules they set caution, not an advisory, and add no hours here. Official beach and cyanobacteria advisories are counted on water pages only.

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

Show table

Share of the May to October season under advisory
Season	Share under advisory	Hours under advisory	Hours covered	Season hours	Partly covered
2022	23.3%	690	2,958	4,416	yes
2023	20.6%	912	4,416	4,416
2024	6.0%	264	4,416	4,416
2025	3.8%	167	4,416	4,416
2026	3.4%	149	4,416	4,416

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
Month	Events	Years of records
Jan	51	4
Feb	9	4
Mar	75	4
Apr	26	4
May	32	4
Jun	67	5
Jul	118	5
Aug	40	5
Sep	55	5
Oct	27	5
Nov	27	5
Dec	54	4

Discharge events by outfall

The 10 outfalls with the most events of 14, 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
Outfall	Events
CHI07 JONES FERRY RD PUMP STATION	64
CHI03 POWER LINE ROW S OF JAMES ST	64
CHI24 FRONT AND DEPOT ST. AREA	62
CHI27 PARKING LOT, TOPORS GARAGE & FRONT ST	61
CHI05 LESLIE ST PUMP STATION	60
CHI32B MAIN STREET WEST OF DEADY MEMORIAL BRIDGE	59
CHI34 GRATTAN ST & HEARTHSTONE TER	53
CHI37 EAST MAIN ST #227	40
CHI04 RIVERVIEW PUMP STATION	32
010	29
Other outfalls (4)	54
Outfall not stated	3

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. Source: EPA ECHO discharge monitoring reports (monthly CSO totals). Covered 2024-01-01 to 2026-09-30.

Discharge events reported

Events per month.

Show table

Discharge events reported
Month	Discharge events reported
Jan 2024	44
Feb 2024	13
Mar 2024	67
Apr 2024	46
May 2024	60
Jun 2024	80
Jul 2024	47
Aug 2024	54
Sep 2024	16
Oct 2024	7
Nov 2024	26
Dec 2024	50
Jan 2025	13
Feb 2025	33
Mar 2025	43
Apr 2025	40
May 2025	82
Jun 2025	44
Jul 2025	55
Aug 2025	25
Sep 2025	35
Oct 2025	37
Nov 2025	32
Dec 2025	22
Jan 2026	7
Feb 2026	7
Mar 2026	45
Apr 2026	48
May 2026	29
Jun 2026	37
Jul 2026	63
Aug 2026	51
Sep 2026	38

Hours of discharge reported

Hours per month.

Show table

Hours of discharge reported
Month	Hours of discharge reported
Jan 2024	7 h
Feb 2024	0 h
Mar 2024	10 h
Apr 2024	0 h
May 2024	3 h
Jun 2024	6 h
Jul 2024	1 h
Aug 2024	0 h
Sep 2024	0 h
Oct 2024	0 h
Nov 2024	0 h
Dec 2024	3 h
Jan 2025	0 h
Feb 2025	0 h
Mar 2025	5 h
Apr 2025	0 h
May 2025	12 h
Jun 2025	1 h
Jul 2025	3 h
Aug 2025	1 h
Sep 2025	2 h
Oct 2025	4 h
Nov 2025	0 h
Dec 2025	2 h
Jan 2026	0 h
Feb 2026	0 h
Mar 2026	0 h
Apr 2026	0 h
May 2026	0 h
Jun 2026	1 h
Jul 2026	10 h
Aug 2026	8 h
Sep 2026	0 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.

MassDEP sewage notification portal: 2022-06-30 to now

Month	Events	Years of records
Jan	51	4
Feb	9	4
Mar	75	4
Apr	26	4
May	32	4
Jun	67	5
Jul	118	5
Aug	40	5
Sep	55	5
Oct	27	5
Nov	27	5
Dec	54	4

Month	Events	Years of records
Jan	51	4
Feb	9	4
Mar	75	4
Apr	26	4
May	32	4
Jun	67	5
Jul	118	5
Aug	40	5
Sep	55	5
Oct	27	5
Nov	27	5
Dec	54	4

Month	Events	Years of records
Jan	51	4
Feb	9	4
Mar	75	4
Apr	26	4
May	32	4
Jun	67	5
Jul	118	5
Aug	40	5
Sep	55	5
Oct	27	5
Nov	27	5
Dec	54	4