DirtyWaterWatch

Connecticut / Dischargers /

Greater New Haven Water Pollution Control Authority (East Shore WPAF)

CSO · Connecticut · New Haven, Hamden, East Haven, Woodbridge

NPDES permit
CT0100366
Outfalls
11 with coordinates in the registry
Receiving waters
West River; Mill River; Quinnipiac River; New Haven Harbor; Long Island Sound
Tracked waters
Mill River, CT, Quinnipiac River, CT, Long Island Sound, CT
Events tracked
3,429 discharges · latest Oct 16, 2026, 9:30 AM EDT
Volume reported
8,597,216,848 gallons across the 1,555 discharges that give a volume (1874 without one)

Source: discharger record from the project's research and EPA ECHO (dischargers.json); counts from the 3,429 event records below, as of 2026-11-02 11:56 UTC.

How it tells the public

CT DEEP Performance Dashboard (QScend QAlert reports shown in Zoho Analytics open views: https://deepct.qscend.mygovcenter.com/cms/cms?id=1); X/Twitter @CTSewageSpills (manual DEEP posts). Statutory local notice: operator must notify the chief elected official and local health official within 2 h; they must inform the public within 2 h of receipt (CGS 22a-424a(c)(3)) - channel varies by town. gnhwpca.com: CSO documents/LTCP and 'Construction Alerts' only; no CSO event notices found; Twitter/Facebook links in footer. Emergency 203-466-5260.

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.

11 outfalls in the registry
  • 003 E.T. Grasso Boulevard at Orange Avenue · CSO · West River · not on a tracked water
  • 004 E.T. Grasso Boulevard at Legion Avenue · CSO · West River · not on a tracked water
  • 005 E.T. Grasso Boulevard at Derby Avenue · CSO · West River · not on a tracked water
  • 006 Whalley Avenue at Fitch Street · CSO · West River · not on a tracked water
  • 009 Grande Avenue at James Street · CSO · Mill River
  • 011 Humphrey Street at I-91 · CSO · Mill River
  • 015 James Street Siphon · CSO · Quinnipiac River
  • 016 Poplar Street at River Street · CSO · Quinnipiac River
  • 021 East Street Pump Station · CSO · New Haven Harbor
  • 024 Boulevard Pump Station (Sea Street) · CSO · New Haven Harbor
  • 025 Union Pump Station (Union & State Street) · CSO · New Haven Harbor

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

Event history

Events reported for Greater New Haven Water Pollution Control Authority (East Shore WPAF), newest first
StartEnd Water OutfallTypeVolumeSourceLinks
Oct 16, 2026, 9:30 AM EDT Oct 16, 2026, 10:45 AM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11629, the source gives no report time, retrieved 2026-11-02 11:53 UTC · notice
Oct 16, 2026, 9:30 AM EDT Oct 16, 2026, 10:45 AM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11628, the source gives no report time, retrieved 2026-11-02 11:53 UTC · notice
Oct 16, 2026, 9:30 AM EDT Oct 16, 2026, 10:45 AM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11627, the source gives no report time, retrieved 2026-11-02 11:53 UTC · notice
Oct 16, 2026, 9:30 AM EDT Oct 16, 2026, 10:45 AM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11626, the source gives no report time, retrieved 2026-11-02 11:53 UTC · notice
Oct 12, 2026, 12:00 AM EDT Oct 12, 2026, 1:00 AM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11594, the source gives no report time, retrieved 2026-11-02 11:53 UTC · notice
Oct 12, 2026, 12:00 AM EDT Oct 12, 2026, 1:00 AM EDT not placed not stated Combined sewer overflow “021-No release024-No data 025-No release” Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11593, the source gives no report time, retrieved 2026-11-02 11:53 UTC · notice
Oct 12, 2026, 12:00 AM EDT Oct 12, 2026, 1:00 AM EDT not placed not stated Combined sewer overflow “009-No data 011-No release” Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11592, the source gives no report time, retrieved 2026-11-02 11:53 UTC · notice
Oct 12, 2026, 12:00 AM EDT Oct 12, 2026, 1:00 AM EDT not placed not stated Combined sewer overflow “003-No release004-No release005-No release006-No data” Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11591, the source gives no report time, retrieved 2026-11-02 11:53 UTC · notice
Oct 11, 2026, 2:15 PM EDT Oct 11, 2026, 9:30 PM EDT not placed not stated Combined sewer overflow 663,000 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11575, the source gives no report time, retrieved 2026-11-02 11:53 UTC · notice
Oct 11, 2026, 2:15 PM EDT Oct 11, 2026, 9:00 PM EDT not placed not stated Combined sewer overflow “021-0.289 MG 2010 to 2050024-No data025-No release” Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11574, the source gives no report time, retrieved 2026-11-02 11:53 UTC · notice
Oct 11, 2026, 2:15 PM EDT Oct 11, 2026, 9:00 PM EDT not placed not stated Combined sewer overflow “009-No data 011-No release” Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11573, the source gives no report time, retrieved 2026-11-02 11:53 UTC · notice
Oct 11, 2026, 2:15 PM EDT Oct 11, 2026, 9:00 PM EDT not placed not stated Combined sewer overflow “003-0.197 MG 2005 to 2145004-0.023 MG 2015 to 2040005-0.128 MG 1950 to 2050006-No data” Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11572, the source gives no report time, retrieved 2026-11-02 11:53 UTC · notice
Sep 28, 2026, 12:00 AM EDT Sep 28, 2026, 5:30 AM EDT not placed not stated Combined sewer overflow “0.004 MGD” Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11549, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Sep 28, 2026, 12:00 AM EDT Sep 28, 2026, 11:45 PM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11548, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Sep 28, 2026, 12:00 AM EDT Sep 28, 2026, 11:45 PM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11547, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Sep 28, 2026, 12:00 AM EDT Sep 28, 2026, 11:45 PM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11546, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Sep 27, 2026, 10:15 PM EDT Sep 27, 2026, 11:45 PM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11545, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Sep 27, 2026, 10:15 PM EDT Sep 27, 2026, 11:45 PM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11544, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Sep 27, 2026, 10:15 PM EDT Sep 27, 2026, 11:45 PM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11543, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Sep 27, 2026, 10:15 PM EDT Sep 27, 2026, 11:59 PM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11542, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Sep 26, 2026, 3:30 AM EDT Sep 26, 2026, 11:45 PM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11527, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Sep 26, 2026, 3:30 AM EDT Sep 26, 2026, 11:45 PM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11526, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Sep 26, 2026, 3:30 AM EDT Sep 26, 2026, 11:45 PM EDT not placed not stated Combined sewer overflow “1.798 mgd” Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11525, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Sep 26, 2026, 3:30 AM EDT Sep 26, 2026, 12:30 AM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11524, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Sep 20, 2026, 2:15 PM EDT Sep 20, 2026, 1:00 PM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11506, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Sep 20, 2026, 12:15 PM EDT Sep 20, 2026, 1:00 PM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11508, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Sep 20, 2026, 12:15 PM EDT Sep 20, 2026, 1:00 PM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11507, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Sep 20, 2026, 12:15 PM EDT Sep 20, 2026, 1:15 PM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11505, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Sep 13, 2026, 8:30 AM EDT Sep 13, 2026, 11:45 AM EDT not placed not stated Combined sewer overflow 3.99 million gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11428, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Sep 13, 2026, 8:30 AM EDT Sep 13, 2026, 2:30 PM EDT not placed not stated Combined sewer overflow 1.89 million gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11426, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Sep 13, 2026, 8:30 AM EDT Sep 13, 2026, 11:30 AM EDT not placed not stated Combined sewer overflow 8.02 million gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11425, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Sep 13, 2026, 8:30 AM EDT Sep 13, 2026, 12:45 PM EDT not placed not stated Combined sewer overflow 6.46 million gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11424, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Sep 4, 2026, 10:00 AM EDT Sep 4, 2026, 10:45 AM EDT not placed Manhole, State St, Hamden, CT Sanitary sewer overflow “Less than 50 gallons” Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11405, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Sep 4, 2026, 4:30 AM EDT Sep 4, 2026, 4:45 AM EDT not placed not stated Combined sewer overflow 155,000 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11396, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Sep 4, 2026, 4:30 AM EDT Sep 4, 2026, 4:45 AM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11395, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Sep 4, 2026, 4:30 AM EDT Sep 4, 2026, 4:45 AM EDT not placed not stated Combined sewer overflow 55,000 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11394, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Sep 4, 2026, 4:30 AM EDT Sep 4, 2026, 4:45 AM EDT not placed not stated Combined sewer overflow “003-No data 004-No release005-0.057 MG 0420 to 0445006-No release” Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11393, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Sep 1, 2026, 4:00 AM EDT Sep 1, 2026, 4:45 AM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11354, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Sep 1, 2026, 4:00 AM EDT Sep 1, 2026, 4:45 AM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11353, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Sep 1, 2026, 4:00 AM EDT Sep 1, 2026, 5:00 AM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11352, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Sep 1, 2026, 4:00 AM EDT Sep 1, 2026, 4:45 AM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11351, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Aug 23, 2026, 9:15 AM EDT Aug 23, 2026, 10:30 AM EDT not placed not stated Combined sewer overflow 1.26 million gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11292, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Aug 23, 2026, 9:15 AM EDT Aug 23, 2026, 11:15 AM EDT not placed not stated Combined sewer overflow “015-0.486 MG 0915 to 1110016-No data” Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11291, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Aug 23, 2026, 9:15 AM EDT Aug 23, 2026, 11:45 AM EDT not placed not stated Combined sewer overflow 649,000 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11290, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Aug 23, 2026, 9:15 AM EDT Aug 23, 2026, 10:30 AM EDT not placed not stated Combined sewer overflow 449,000 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11288, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Aug 21, 2026, 12:00 AM EDT Aug 21, 2026, 12:30 AM EDT not placed not stated Combined sewer overflow “015-0.025 MG 0000 to 0025016-No data” Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11267, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Aug 21, 2026, 12:00 AM EDT Aug 21, 2026, 1:00 AM EDT not placed not stated Combined sewer overflow 174,000 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11266, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Aug 21, 2026, 12:00 AM EDT Aug 21, 2026, 3:00 AM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11265, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Aug 21, 2026, 12:00 AM EDT Aug 21, 2026, 12:45 AM EDT not placed not stated Combined sewer overflow 323,000 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11264, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Aug 20, 2026, 7:45 PM EDT Aug 21, 2026, 12:00 AM EDT not placed not stated Combined sewer overflow “015-0.857 MG 2230 to 0000016-No data available” Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11260, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Aug 20, 2026, 7:45 PM EDT Aug 20, 2026, 12:00 AM EDT not placed not stated Combined sewer overflow 665,000 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11259, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Aug 20, 2026, 7:45 PM EDT Aug 20, 2026, 12:00 AM EDT not placed not stated Combined sewer overflow 976,000 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11258, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Aug 20, 2026, 7:45 PM EDT Aug 20, 2026, 12:00 AM EDT not placed not stated Combined sewer overflow 6.44 million gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11257, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Aug 17, 2026, 8:30 AM EDT Aug 17, 2026, 3:15 AM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11230, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Aug 17, 2026, 2:30 AM EDT Aug 17, 2026, 3:15 AM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11231, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Aug 17, 2026, 2:30 AM EDT Aug 17, 2026, 3:15 AM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11229, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Aug 17, 2026, 2:30 AM EDT Aug 17, 2026, 3:15 AM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11228, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Aug 13, 2026, 1:30 AM EDT Aug 13, 2026, 3:00 AM EDT not placed not stated Combined sewer overflow 822,000 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11210, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Aug 13, 2026, 1:30 AM EDT Aug 13, 2026, 3:30 AM EDT not placed not stated Combined sewer overflow 255,000 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11209, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Aug 13, 2026, 1:30 AM EDT Aug 13, 2026, 2:45 AM EDT not placed not stated Combined sewer overflow 566,000 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11208, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Aug 13, 2026, 1:30 AM EDT Aug 13, 2026, 2:45 AM EDT not placed not stated Combined sewer overflow 1.13 million gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11207, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Aug 7, 2026, 8:30 PM EDT Aug 7, 2026, 11:45 PM EDT not placed not stated Combined sewer overflow 21,000 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11189, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Aug 7, 2026, 8:30 PM EDT Aug 7, 2026, 11:45 PM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11188, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Aug 7, 2026, 8:30 PM EDT Aug 7, 2026, 11:30 PM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11187, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Aug 7, 2026, 8:30 PM EDT Aug 7, 2026, 11:45 PM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11186, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Aug 3, 2026, 7:00 AM EDT Aug 3, 2026, 9:00 AM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11139, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Aug 3, 2026, 7:00 AM EDT Aug 3, 2026, 9:00 AM EDT not placed not stated Combined sewer overflow “021-No data available024-No release025-No release” Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11138, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Aug 3, 2026, 7:00 AM EDT Aug 3, 2026, 9:15 AM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11137, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Aug 3, 2026, 7:00 AM EDT Aug 3, 2026, 7:30 AM EDT not placed not stated Combined sewer overflow 405,000 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11136, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Jul 29, 2026, 6:00 AM EDT Jul 29, 2026, 8:00 AM EDT not placed not stated Combined sewer overflow 508,000 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11083, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Jul 29, 2026, 6:00 AM EDT Jul 29, 2026, 7:45 AM EDT not placed not stated Combined sewer overflow 15,000 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11082, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Jul 29, 2026, 6:00 AM EDT Jul 29, 2026, 7:15 AM EDT not placed not stated Combined sewer overflow 114,000 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11081, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Jul 29, 2026, 6:00 AM EDT Jul 29, 2026, 10:30 AM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11080, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Jul 21, 2026, 1:45 PM EDT Jul 21, 2026, 3:45 PM EDT not placed not stated Combined sewer overflow 3.45 million gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11012, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Jul 21, 2026, 1:45 PM EDT Jul 21, 2026, 6:00 PM EDT not placed not stated Combined sewer overflow “015-No data available016-1.250 MG 1310 to 1755” Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11011, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Jul 21, 2026, 1:45 PM EDT Jul 21, 2026, 5:00 PM EDT not placed not stated Combined sewer overflow “021-0.991 MG 1405 to 1650024-No data available 025-No release” Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11010, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Jul 21, 2026, 1:45 PM EDT Jul 21, 2026, 4:00 PM EDT not placed not stated Combined sewer overflow 1.84 million gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11009, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Jul 19, 2026, 12:00 AM EDT Jul 19, 2026, 12:15 AM EDT not placed not stated Combined sewer overflow 12,000 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 10993, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Jul 19, 2026, 12:00 AM EDT Jul 19, 2026, 1:00 AM EDT not placed not stated Combined sewer overflow 36,000 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 10992, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Jul 19, 2026, 12:00 AM EDT Jul 19, 2026, 12:30 AM EDT not placed not stated Combined sewer overflow 28,000 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 10991, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Jul 19, 2026, 12:00 AM EDT Jul 19, 2026, 12:45 AM EDT not placed not stated Combined sewer overflow 370,000 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 10990, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Jul 18, 2026, 3:00 PM EDT Jul 19, 2026, 12:00 AM EDT not placed not stated Combined sewer overflow 1.02 million gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 10984, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Jul 18, 2026, 3:00 PM EDT Jul 18, 2026, 10:45 PM EDT not placed not stated Combined sewer overflow 770,000 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 10983, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Jul 18, 2026, 3:00 PM EDT Jul 18, 2026, 11:00 PM EDT not placed not stated Combined sewer overflow 92,000 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 10982, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Jul 18, 2026, 3:00 PM EDT Jul 18, 2026, 10:15 PM EDT not placed not stated Combined sewer overflow 182,000 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 10981, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Jul 7, 2026, 12:00 AM EDT Jul 7, 2026, 12:15 AM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 10930, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Jul 7, 2026, 12:00 AM EDT Jul 7, 2026, 12:15 AM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 10929, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Jul 7, 2026, 12:00 AM EDT Jul 7, 2026, 12:15 AM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 10928, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Jul 7, 2026, 12:00 AM EDT Jul 7, 2026, 12:15 AM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 10927, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Jul 6, 2026, 12:45 AM EDT Jul 6, 2026, 8:00 PM EDT not placed not stated Combined sewer overflow 2.63 million gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 10900, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Jul 6, 2026, 12:45 AM EDT Jul 6, 2026, 9:00 PM EDT not placed not stated Combined sewer overflow 1.02 million gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 10899, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Jul 6, 2026, 12:45 AM EDT Jul 6, 2026, 9:30 PM EDT not placed not stated Combined sewer overflow 3.34 million gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 10898, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Jul 6, 2026, 12:45 AM EDT Jul 6, 2026, 6:00 PM EDT not placed not stated Combined sewer overflow “009-1.093 MG 1515 to 1810011-No data available” Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 10897, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Jul 4, 2026, 9:15 PM EDT Jul 4, 2026, 9:45 PM EDT not placed not stated Combined sewer overflow 623,000 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 10886, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Jul 4, 2026, 9:15 PM EDT Jul 4, 2026, 11:00 PM EDT not placed not stated Combined sewer overflow 474,000 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 10881, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Jul 4, 2026, 9:15 PM EDT Jul 4, 2026, 10:00 PM EDT not placed not stated Combined sewer overflow 1.38 million gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 10879, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Jul 1, 2026, 5:45 AM EDT Jul 1, 2026, 6:00 AM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 10852, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Jul 1, 2026, 5:45 AM EDT Jul 1, 2026, 6:00 AM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 10851, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Jul 1, 2026, 5:45 AM EDT Jul 1, 2026, 6:00 AM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 10850, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice
Jul 1, 2026, 5:45 AM EDT Jul 1, 2026, 6:00 AM EDT not placed not stated Combined sewer overflow 0 gal Greater New Haven WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 10849, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice

Showing the newest 100 events of 3,667 events. See them all with filters.

History

  • Discharge events, last 12 months177Dec 2025 to Nov 2026
  • Days with a discharge, last 12 months54Dec 2025 to Nov 2026
  • Hours under advisory, last 12 months2,237Dec 2025 to Nov 2026; on this discharger's reports
  • 2026 season under advisory33%May to October; 1,474 h

Discharge events per month

1,278 events, Jan 2022 to Nov 2026. Counted from 952 verified or annual reports, 326 public notices.

  • Combined sewer overflow
  • Sanitary sewer overflow
  • Bypass, blended or other

CT DEEP dashboard records begin 2021-12-02; where CT DEEP's annual report covers a discharger's month, the annual report is counted instead. CT DEEP annual reports (Sewage Right-to-Know) cover 2021-01-01 to 2026-11-02.

Sources: CT DEEP CSO/SSO dashboard; CT DEEP Sewage Right-to-Know annual reports. Covered 2022-01-01 to 2026-11-02.

Show table
Discharge events per month
MonthCombined sewer overflowSanitary sewer overflowBypass, blended or otherTotalCounted fromCoverage
Jan 2022124218Verified or annual reports
Feb 2022200525Verified or annual reports
Mar 2022121316Verified or annual reports
Apr 2022282737Verified or annual reports
May 2022181423Verified or annual reports
Jun 2022203528Verified or annual reports
Jul 202281211Verified or annual reports
Aug 2022160420Verified or annual reports
Sep 2022161421Verified or annual reports
Oct 2022203528Verified or annual reports
Nov 2022160420Verified or annual reports
Dec 2022321841Verified or annual reports
Jan 20234011051Verified or annual reports
Feb 20230101Verified or annual reports
Mar 2023246636Verified or annual reports
Apr 2023201526Verified or annual reports
May 2023162422Verified or annual reports
Jun 202371513Verified or annual reports
Jul 2023211830Verified or annual reports
Aug 2023130720Verified or annual reports
Sep 2023171725Verified or annual reports
Oct 202351511Verified or annual reports
Nov 202383314Verified or annual reports
Dec 2023204933Verified or annual reports
Jan 2024280735Verified or annual reports
Feb 202482212Verified or annual reports
Mar 20244811160Verified or annual reports
Apr 2024281736Verified or annual reports
May 2024360945Verified or annual reports
Jun 2024240731Verified or annual reports
Jul 2024320739Verified or annual reports
Aug 2024241631Verified or annual reports
Sep 2024120214Verified or annual reports
Oct 20244116Verified or annual reports
Nov 2024121316Verified or annual reports
Dec 2024200525Verified or annual reports
Jan 20250628Verified or annual reports
Feb 2025010212Verified or annual reports
Mar 2025001212Verified or annual reports
Apr 2025161421Public notices (no report yet)
May 2025321639Public notices (no report yet)
Jun 20254105Public notices (no report yet)
Jul 2025161017Public notices (no report yet)
Aug 2025120012Public notices (no report yet)
Sep 2025162018Public notices (no report yet)
Oct 2025280028Public notices (no report yet)
Nov 20258109Public notices (no report yet)
Dec 2025120012Public notices (no report yet)
Jan 20263003Public notices (no report yet)
Feb 20264206Public notices (no report yet)
Mar 2026163019Public notices (no report yet)
Apr 20268008Public notices (no report yet)
May 2026121013Public notices (no report yet)
Jun 2026142016Public notices (no report yet)
Jul 2026310031Public notices (no report yet)
Aug 2026280028Public notices (no report yet)
Sep 2026281029Public notices (no report yet)
Oct 2026120012Public notices (no report yet)
Nov 20260000

Hours under advisory per month

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

  • Advisory in effect

401 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. 5 events reported to last more than 31 days are counted to 31 days. Official beach and cyanobacteria advisories are counted on water pages only. CT DEEP dashboard records begin 2021-12-02; where CT DEEP's annual report covers a discharger's month, the annual report is counted instead. CT DEEP annual reports (Sewage Right-to-Know) cover 2021-01-01 to 2026-11-02. CT DEEP's reporting archive runs 2016-07-04 to 2021-12-02.

Sources: CT DEEP CSO/SSO dashboard; CT DEEP Sewage Right-to-Know annual reports; CT DEEP reporting archive 2016-2021. Covered 2016-07-04 to 2026-11-02.

Show table
Hours under advisory per month
MonthHours under advisoryFrom discharge windowsHours in monthCoverage
Jan 2022252252744
Feb 2022220220672
Mar 2022207207744
Apr 2022351351720
May 2022259259744
Jun 2022313313720
Jul 2022130130744
Aug 2022150150744
Sep 2022218218720
Oct 2022285285744
Nov 2022177177720
Dec 2022293293744
Jan 2023405405744
Feb 20234949672
Mar 2023360360744
Apr 2023210210720
May 2023263263744
Jun 2023235235720
Jul 2023439439744
Aug 2023262262744
Sep 2023340340720
Oct 2023263263744
Nov 2023235235720
Dec 2023369369744
Jan 2024272272744
Feb 2024123123696
Mar 2024434434744
Apr 2024258258720
May 2024373373744
Jun 2024195195720
Jul 2024309309744
Aug 2024288288744
Sep 2024101101720
Oct 2024101101744
Nov 2024169169720
Dec 2024240240744
Jan 2025212212744
Feb 2025235235672
Mar 2025213213744
Apr 2025230230720
May 2025285285744
Jun 2025131131720
Jul 2025175175744
Aug 2025100100744
Sep 2025250250720
Oct 2025244244744
Nov 2025139139720
Dec 2025155155744
Jan 20264848744
Feb 2026110110672
Mar 2026349349744
Apr 2026101101720
May 2026174174744
Jun 2026253253720
Jul 2026310310744
Aug 2026306306744
Sep 2026323323720
Oct 2026108108744
Nov 20260032

Days with a discharge per month

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

Sources: CT DEEP CSO/SSO dashboard; CT DEEP Sewage Right-to-Know annual reports. Covered 2022-01-01 to 2026-11-02.

Show table
Days with a discharge per month
MonthDays with a dischargeCoverage
Jan 20226
Feb 20225
Mar 20225
Apr 202210
May 20226
Jun 20228
Jul 20223
Aug 20224
Sep 20224
Oct 20226
Nov 20225
Dec 20228
Jan 202312
Feb 20231
Mar 20238
Apr 20236
May 20237
Jun 20236
Jul 202310
Aug 20237
Sep 20238
Oct 20236
Nov 20235
Dec 202310
Jan 20247
Feb 20244
Mar 202414
Apr 20248
May 20249
Jun 20247
Jul 20248
Aug 20247
Sep 20243
Oct 20242
Nov 20244
Dec 20246
Jan 20255
Feb 20255
Mar 20256
Apr 20254
May 20258
Jun 20252
Jul 20255
Aug 20253
Sep 20256
Oct 20257
Nov 20253
Dec 20253
Jan 20261
Feb 20263
Mar 202610
Apr 20263
May 20264
Jun 20265
Jul 20268
Aug 20267
Sep 20267
Oct 20263
Nov 20260

Discharge events per year, 2016 to 2026

3,122 events, 2016 to 2026.

  • Combined sewer overflow
  • Sanitary sewer overflow
  • Bypass, blended or other
  • Partly covered or sparse source

CT DEEP dashboard records begin 2021-12-02; where CT DEEP's annual report covers a discharger's month, the annual report is counted instead. CT DEEP annual reports (Sewage Right-to-Know) cover 2021-01-01 to 2026-11-02. CT DEEP's reporting archive runs 2016-07-04 to 2021-12-02.

Sources: CT DEEP CSO/SSO dashboard; CT DEEP Sewage Right-to-Know annual reports; CT DEEP reporting archive 2016-2021. Covered 2016-07-04 to 2026-11-02.

Show table
Discharge events per year, 2016 to 2026
YearCombined sewer overflowSanitary sewer overflowBypass, blended or otherTotalCoverage
201699150114Partly covered or sparse source
2017189500239
2018289483340
2019187310218
2020251320283
20215714435650Partly covered or sparse source
20222181753288
20231912269282
2024276767350
20251442326193
202615690165

Reported volume per year

Gallons, summed from the 1,305 events that gave a number (1,817 did not).

  • Partly covered or sparse source

1,817 of 3,122 events gave no volume as a number (1,150 gave a range); only numbers are summed. Some CT DEEP annual-report volumes are given as text or ranges and are not summed. CT DEEP's 2016-2021 archive gives volumes as ranges ("20,001 - 50,000 gallons"); they are not summed.

Sources: CT DEEP CSO/SSO dashboard; CT DEEP Sewage Right-to-Know annual reports; CT DEEP reporting archive 2016-2021. Covered 2016-07-04 to 2026-11-02.

Show table
Reported volume per year
YearGallonsEvents with a numberEvents withoutCoverage
201600114Partly covered or sparse source
201795,02065174
201894,48113327
20191,8164214
20204,206,59312271
2021108,357,326227423Partly covered or sparse source
20227,546,527,12762226
2023402,191,8372820
2024359,994,56433218
202592,228,97416528
202654,807,88814322

Hours under advisory per year

Hours under advisory each year; 2026 to date.

  • Advisory in effect
  • Partly covered or sparse source

401 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. 5 events reported to last more than 31 days are counted to 31 days. Official beach and cyanobacteria advisories are counted on water pages only.

Sources: CT DEEP CSO/SSO dashboard; CT DEEP Sewage Right-to-Know annual reports; CT DEEP reporting archive 2016-2021. Covered 2016-07-04 to 2026-11-02.

Show table
Hours under advisory per year
YearHours under advisoryShare of the yearCoverage
20161,60318.2%Partly covered or sparse source
20173,36238.4%
20184,09146.7%
20193,59841.1%
20203,29437.5%
20212,70830.9%Partly covered or sparse source
20222,85232.6%
20233,42939.1%
20242,86132.6%
20252,36927.0%
20262,08228.4%

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: 2016 (share is of the covered hours). 401 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. 5 events reported to last more than 31 days are counted to 31 days. Official beach and cyanobacteria advisories are counted on water pages only.

Sources: CT DEEP CSO/SSO dashboard; CT DEEP Sewage Right-to-Know annual reports; CT DEEP reporting archive 2016-2021. Covered 2016-07-04 to 2026-11-02.

Show table
Share of the May to October season under advisory
SeasonShare under advisoryHours under advisoryHours coveredSeason hoursPartly covered
201639.0%1,1222,8764,416yes
201736.3%1,6044,4164,416
201848.2%2,1304,4164,416
201934.8%1,5354,4164,416
202043.4%1,9174,4164,416
202129.4%1,2984,4164,416
202230.6%1,3544,4164,416
202340.8%1,8024,4164,416
202430.9%1,3664,4164,416
202526.8%1,1854,4164,416
202633.4%1,4744,4164,416

Discharge events by calendar month, all years

Every counted discharge event, by the calendar month it began.

Months are summed over every year a source covers; the table gives the number of years behind each month.

Sources: CT DEEP CSO/SSO dashboard; CT DEEP Sewage Right-to-Know annual reports; CT DEEP reporting archive 2016-2021. Covered 2016-07-04 to 2026-11-02.

Show table
Discharge events by calendar month, all years
MonthEventsYears of records
Jan22210
Feb17110
Mar27010
Apr30610
May32310
Jun21110
Jul32911
Aug23111
Sep28211
Oct33711
Nov21311
Dec22710

Discharge events by outfall

The 10 outfalls with the most events of 247, all years.

CT DEEP dashboard records begin 2021-12-02; where CT DEEP's annual report covers a discharger's month, the annual report is counted instead. CT DEEP annual reports (Sewage Right-to-Know) cover 2021-01-01 to 2026-11-02. CT DEEP's reporting archive runs 2016-07-04 to 2021-12-02.

Sources: CT DEEP CSO/SSO dashboard; CT DEEP Sewage Right-to-Know annual reports; CT DEEP reporting archive 2016-2021. Covered 2016-07-04 to 2026-11-02.

Show table
Discharge events by outfall
OutfallEvents
Quinnipiac River CSOs: 015, 016, 019, 020592
West River CSOs: 003, 004, 005, 006566
New Haven Harbor CSOs: 021, 024, 025561
Mill River CSOs: 009, 011, 012392
Treatment Plant, 345 E Shore Pkwy, New Haven, CT212
Mill River CSOs: 009,011,012184
Treatment Plant, 345 EAST SHORE PKWY16
Treatment Plant, 345 EAST SHORE PARKWAY13
Treatment Plant, east shore parkway4
Sewer Main, 955 Whitney Ave, Hamden.4
Other outfalls (237)306
Outfall not stated272
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.

  • CT DEEP CSO/SSO dashboard: 2021-12-02 to now
  • CT DEEP Sewage Right-to-Know annual reports: 2021-01-01 to now
  • CT DEEP reporting archive 2016-2021: 2016-07-04 to 2021-12-02