City of Shelton WPCF
SSO · Connecticut · Shelton
- NPDES permit
- CT0100714
- Outfalls
- none with coordinates yet (the state's layer lists 1)
- Receiving waters
- Housatonic River
- Tracked waters
- Housatonic River, CT, Lake Housatonic, CT
- Events tracked
- 24 discharges · latest Jan 29, 2026, 7:30 AM EST
- Volume reported
- 1,863 gallons across the 12 discharges that give a volume (12 without one)
Source: discharger record from the project's research and EPA ECHO (dischargers.json); counts from the 24 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.
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.
Event history
| Start | End | Water | Outfall | Type | Volume | Source | Links |
|---|---|---|---|---|---|---|---|
| Jan 29, 2026, 7:30 AM EST | Jan 29, 2026, 9:30 AM EST | not placed | Manhole, 51 Wells View Rd, Shelton, CT | Sanitary sewer overflow | 500 gal | SHELTON (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 10283, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice | record below |
Full record (older than 180 days, so no page of its own) | |||||||
| Mar 13, 2025, 4:00 PM EDT | Mar 14, 2025, 4:30 PM EDT | not placed | Sewer Main, 159 Division Ave, Shelton, CT | Sanitary sewer overflowrevised | 0 gal | SHELTON (CT DEEP Sewage Right-to-Know annual report 2026) via ct-deep-annual, record 9228-2, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 11:53 UTC · notice | record below |
Full record (older than 180 days, so no page of its own) | |||||||
| Mar 13, 2025, 4:00 PM EDT | Mar 14, 2025, 4:30 PM EDT | not placed | Sewer Main, 159 Division Ave, Shelton, CT | Sanitary sewer overflowrevised | 0 gal | SHELTON (CT DEEP Sewage Right-to-Know annual report 2026) via ct-deep-annual, record 9228, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 11:53 UTC · notice | record below |
Full record (older than 180 days, so no page of its own) | |||||||
| Mar 13, 2025, 4:00 PM EDT | Mar 14, 2025, 4:30 PM EDT | not placed | Sewer Main, 159 Division Ave, Shelton, CT | Sanitary sewer overflow | 0 gal | SHELTON (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 9228, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice | record below |
Full record (older than 180 days, so no page of its own) | |||||||
| Mar 13, 2025, 10:00 AM EDT | Mar 13, 2025, 4:00 PM EDT | not placed | Sewer Main, 11 Meadow St, Shelton, CT | Sanitary sewer overflowrevised | 250 gal | SHELTON (CT DEEP Sewage Right-to-Know annual report 2026) via ct-deep-annual, record 9226-2, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 11:53 UTC · notice | record below |
Full record (older than 180 days, so no page of its own) | |||||||
| Mar 13, 2025, 10:00 AM EDT | Mar 13, 2025, 4:00 PM EDT | not placed | Sewer Main, 11 Meadow St, Shelton, CT | Sanitary sewer overflowrevised | 250 gal | SHELTON (CT DEEP Sewage Right-to-Know annual report 2026) via ct-deep-annual, record 9226, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 11:53 UTC · notice | record below |
Full record (older than 180 days, so no page of its own) | |||||||
| Mar 13, 2025, 10:00 AM EDT | Mar 13, 2025, 4:00 PM EDT | not placed | Sewer Main, 11 Meadow St, Shelton, CT | Sanitary sewer overflow | 250 gal | SHELTON (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 9226, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice | record below |
Full record (older than 180 days, so no page of its own) | |||||||
| Feb 14, 2025, 11:00 AM EST | Feb 15, 2025, 2:00 PM EST | not placed | Sewer Main, 275 Riverview Ave, Shelton, CT | Sanitary sewer overflowrevised | 500 gal | SHELTON (CT DEEP Sewage Right-to-Know annual report 2026) via ct-deep-annual, record 9123-2, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 11:53 UTC · notice | record below |
Full record (older than 180 days, so no page of its own) | |||||||
| Feb 14, 2025, 11:00 AM EST | Feb 15, 2025, 2:00 PM EST | not placed | Sewer Main, Shelton, CT | Sanitary sewer overflowrevised | 500 gal | SHELTON (CT DEEP Sewage Right-to-Know annual report 2026) via ct-deep-annual, record 9123, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 11:53 UTC · notice | record below |
Full record (older than 180 days, so no page of its own) | |||||||
| Feb 14, 2025, 11:00 AM EST | Feb 15, 2025, 2:00 PM EST | not placed | Sewer Main, 275 Riverview Ave, Shelton, CT | Sanitary sewer overflow | 500 gal | SHELTON (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 9123, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice | record below |
Full record (older than 180 days, so no page of its own) | |||||||
| Nov 29, 2024, 10:00 AM EST | Nov 29, 2024, 5:30 PM EST | not placed | Manhole, 20 Wakelee Ave, Shelton, CT | Sanitary sewer overflow | 200 gal | SHELTON (CT DEEP Sewage Right-to-Know annual report 2025) via ct-deep-annual, record x82e5d27fe8b1, published Mar 31, 2025, 1:52 PM EDT, retrieved 2026-11-02 11:53 UTC · notice | record below |
Full record (older than 180 days, so no page of its own) | |||||||
| Oct 12, 2024, 12:15 PM EDT | Oct 12, 2024, 2:00 PM EDT | not placed | Manhole, 739 Long Hill Ave, Shelton, CT | Sanitary sewer overflow | 45 gal | SHELTON (CT DEEP Sewage Right-to-Know annual report 2025) via ct-deep-annual, record x6085288a5506, published Mar 31, 2025, 1:52 PM EDT, retrieved 2026-11-02 11:53 UTC · notice | record below |
Full record (older than 180 days, so no page of its own) | |||||||
| Jul 22, 2024, 9:00 PM EDT | Jul 23, 2024, 7:00 AM EDT | not placed | Basement, 116-118 Maltby St, Shelton, CT | Sanitary sewer overflow | 10 gal | SHELTON (CT DEEP Sewage Right-to-Know annual report 2025) via ct-deep-annual, record x4137ea7a8286, published Mar 31, 2025, 1:52 PM EDT, retrieved 2026-11-02 11:53 UTC · notice | record below |
Full record (older than 180 days, so no page of its own) | |||||||
| Jul 19, 2024, 11:30 AM EDT | Jul 19, 2024, 2:30 AM EDT | not placed | Manhole, 17 Coram Rd, Shelton, CT | Sanitary sewer overflow | 8 gal | SHELTON (CT DEEP Sewage Right-to-Know annual report 2025) via ct-deep-annual, record x349f9a04d250, published Mar 31, 2025, 1:52 PM EDT, retrieved 2026-11-02 11:53 UTC · notice | record below |
Full record (older than 180 days, so no page of its own) | |||||||
| Nov 15, 2022, 9:30 AM EST | Nov 16, 2022, 11:15 AM EST | not placed | Basement, 92 Wooster St, Shelton, CT | Sanitary sewer overflow | “Less than 25 gallons” | SHELTON (CT DEEP Sewage Right-to-Know annual report 2023) via ct-deep-annual, record x3d304780c1af, published Jan 9, 2025, 2:54 PM EST, retrieved 2026-11-02 11:53 UTC · notice | record below |
Full record (older than 180 days, so no page of its own) | |||||||
| Oct 11, 2022, 9:45 AM EDT | Oct 11, 2022, 10:30 AM EDT | not placed | Sewer Main, 11 Birdseye Rd Ext, Shelton, CT | Sanitary sewer overflow | 150 gal | SHELTON (CT DEEP Sewage Right-to-Know annual report 2023) via ct-deep-annual, record x80270331e88c, published Jan 9, 2025, 2:54 PM EST, retrieved 2026-11-02 11:53 UTC · notice | record below |
Full record (older than 180 days, so no page of its own) | |||||||
| Feb 4, 2021, 11:00 AM EST | Feb 4, 2021, 1:00 PM EST | not placed | Lateral - Public, 1 Trap Falls Road | Sanitary sewer overflow | “1-50 gallons” | Shelton (CT DEEP Sewage Right-to-Know annual report 2022) via ct-deep-annual, record xe9719280fe6c, published Oct 9, 2024, 12:47 PM EDT, retrieved 2026-11-02 11:53 UTC · notice | record below |
Full record (older than 180 days, so no page of its own) | |||||||
| Feb 4, 2021, 11:00 AM EST | Feb 4, 2021, 1:00 PM EST | not placed | Lateral - Public, 1 Trap Falls Road | Sanitary sewer overflow | “1 - 50” | Shelton (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35964932, reported Feb 4, 2021, 3:19 PM EST, retrieved 2026-11-02 11:54 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Jan 12, 2021, 8:00 AM EST | Jan 12, 2021, 9:00 AM EST | not placed | Sewer Main, 10 Silva Drive | Sanitary sewer overflow | “1-50 gallons” | Shelton (CT DEEP Sewage Right-to-Know annual report 2022) via ct-deep-annual, record x56084cd71a59, published Oct 9, 2024, 12:47 PM EDT, retrieved 2026-11-02 11:53 UTC · notice | record below |
Full record (older than 180 days, so no page of its own) | |||||||
| Jan 12, 2021, 8:00 AM EST | Jan 12, 2021, 9:00 AM EST | not placed | Sewer Main, 10 Silva Drive | Sanitary sewer overflow | “1 - 50” | Shelton (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35964720, reported Jan 12, 2021, 12:53 PM EST, retrieved 2026-11-02 11:54 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Dec 11, 2019, 10:45 AM EST | Dec 11, 2019, 12:30 PM EST | not placed | Sewer Main, 20 Plaskon Drive Ext | Sanitary sewer overflow | “1 - 50” | Shelton (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35964719, reported Dec 11, 2019, 2:20 PM EST, retrieved 2026-11-02 11:54 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Apr 27, 2019, 6:00 PM EDT | Apr 27, 2019, 7:30 PM EDT | “Wells Hollow Brook” (not placed) | Manhole, 501 Bridgeport Ave/Woodland Mobile Home Park | Sanitary sewer overflow | “same” | Shelton (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35964419, reported Apr 30, 2019, 12:29 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) | |||||||
| Apr 27, 2019, 6:00 PM EDT | Apr 27, 2019, 7:30 PM EDT | “Wells Hollow Brook” (not placed) | Manhole, 501 Bridgeport Ave/Woodland Mobile Home Park | Sanitary sewer overflow | “same” | Shelton (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35964418, reported Apr 30, 2019, 9:11 AM EDT, retrieved 2026-11-02 11:54 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Mar 20, 2019, 9:00 AM EDT | Mar 20, 2019, 10:15 AM EDT | not placed | Manhole, 20 Plaskon Drive Ext | Sanitary sewer overflow | “51 - 500 gallons” | Shelton (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35964287, reported Mar 20, 2019, 12:07 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) | |||||||
| Mar 5, 2019, 8:15 AM EST | Mar 5, 2019, 9:30 AM EST | not placed | Manhole, 265 Riverview Ave | Sanitary sewer overflow | “51 - 500 gallons” | Shelton (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35964718, reported Mar 5, 2019, 11:07 AM EST, retrieved 2026-11-02 11:54 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Mar 5, 2019, 8:15 AM EST | Mar 5, 2019, 9:30 AM EST | Lake Housatonic, CT | Basement, 239 Riverview Ave | Sanitary sewer overflow | “51 - 500 gallons” | Shelton (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35964707, reported Mar 13, 2019, 2:32 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) | |||||||
| May 30, 2018, 9:30 AM EDT | May 30, 2018, 10:30 AM EDT | not placed | Manhole, 11 Cribbins Avenue | Sanitary sewer overflow | “1 - 50” | Shelton (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35964862, reported May 30, 2018, 12:21 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) | |||||||
| Feb 24, 2018, 2:45 PM EST | Feb 24, 2018, 4:15 PM EST | Housatonic River, CT | Manhole, 78 William Street | Sanitary sewer overflow | 100 gal | Shelton (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35964861, reported Mar 1, 2018, 10:47 AM EST, retrieved 2026-11-02 11:54 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Feb 24, 2018, 2:45 PM EST | Feb 24, 2018, 4:15 PM EST | Housatonic River, CT | Manhole, 78 William Street | Sanitary sewer overflow | 100 gal | Shelton (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35964860, reported Feb 27, 2018, 10:13 AM EST, retrieved 2026-11-02 11:54 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
| Jan 27, 2017, 12:15 PM EST | Jan 27, 2017, 1:35 PM EST | not placed | Manhole, 3 Cribbins Avenue | Sanitary sewer overflow | 0 gal | Shelton (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35964863, reported Jan 27, 2017, 2:19 PM EST, retrieved 2026-11-02 11:54 UTC · notice | record below · Map |
Full record (older than 180 days, so no page of its own) | |||||||
History
- Discharge events, last 12 months1Dec 2025 to Nov 2026
- Days with a discharge, last 12 months1Dec 2025 to Nov 2026
- Hours under advisory, last 12 months50Dec 2025 to Nov 2026; on this discharger's reports
- 2026 season under advisory0.0%May to October; 0 h
Discharge events per month
10 events, Jan 2022 to Nov 2026. Counted from 6 verified or annual reports, 4 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
| Month | Combined sewer overflow | Sanitary sewer overflow | Bypass, blended or other | Total | Counted from | Coverage |
|---|---|---|---|---|---|---|
| Jan 2022 | 0 | 0 | 0 | 0 | ||
| Feb 2022 | 0 | 0 | 0 | 0 | ||
| Mar 2022 | 0 | 0 | 0 | 0 | ||
| Apr 2022 | 0 | 0 | 0 | 0 | ||
| May 2022 | 0 | 0 | 0 | 0 | ||
| Jun 2022 | 0 | 0 | 0 | 0 | ||
| Jul 2022 | 0 | 0 | 0 | 0 | ||
| Aug 2022 | 0 | 0 | 0 | 0 | ||
| Sep 2022 | 0 | 0 | 0 | 0 | ||
| Oct 2022 | 0 | 1 | 0 | 1 | Verified or annual reports | |
| Nov 2022 | 0 | 1 | 0 | 1 | Verified or annual reports | |
| Dec 2022 | 0 | 0 | 0 | 0 | ||
| Jan 2023 | 0 | 0 | 0 | 0 | ||
| Feb 2023 | 0 | 0 | 0 | 0 | ||
| Mar 2023 | 0 | 0 | 0 | 0 | ||
| Apr 2023 | 0 | 0 | 0 | 0 | ||
| May 2023 | 0 | 0 | 0 | 0 | ||
| Jun 2023 | 0 | 0 | 0 | 0 | ||
| Jul 2023 | 0 | 0 | 0 | 0 | ||
| Aug 2023 | 0 | 0 | 0 | 0 | ||
| Sep 2023 | 0 | 0 | 0 | 0 | ||
| Oct 2023 | 0 | 0 | 0 | 0 | ||
| Nov 2023 | 0 | 0 | 0 | 0 | ||
| Dec 2023 | 0 | 0 | 0 | 0 | ||
| Jan 2024 | 0 | 0 | 0 | 0 | ||
| Feb 2024 | 0 | 0 | 0 | 0 | ||
| Mar 2024 | 0 | 0 | 0 | 0 | ||
| Apr 2024 | 0 | 0 | 0 | 0 | ||
| May 2024 | 0 | 0 | 0 | 0 | ||
| Jun 2024 | 0 | 0 | 0 | 0 | ||
| Jul 2024 | 0 | 2 | 0 | 2 | Verified or annual reports | |
| Aug 2024 | 0 | 0 | 0 | 0 | ||
| Sep 2024 | 0 | 0 | 0 | 0 | ||
| Oct 2024 | 0 | 1 | 0 | 1 | Verified or annual reports | |
| Nov 2024 | 0 | 1 | 0 | 1 | Verified or annual reports | |
| Dec 2024 | 0 | 0 | 0 | 0 | ||
| Jan 2025 | 0 | 0 | 0 | 0 | ||
| Feb 2025 | 0 | 1 | 0 | 1 | Public notices (no report yet) | |
| Mar 2025 | 0 | 2 | 0 | 2 | Public notices (no report yet) | |
| Apr 2025 | 0 | 0 | 0 | 0 | ||
| May 2025 | 0 | 0 | 0 | 0 | ||
| Jun 2025 | 0 | 0 | 0 | 0 | ||
| Jul 2025 | 0 | 0 | 0 | 0 | ||
| Aug 2025 | 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 | 1 | 0 | 1 | Public notices (no report yet) | |
| 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 | 0 | 0 | 0 | 0 | ||
| Jul 2026 | 0 | 0 | 0 | 0 | ||
| 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
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. 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
| Month | Hours under advisory | From discharge windows | Hours in month | Coverage |
|---|---|---|---|---|
| Jan 2022 | 0 | 0 | 744 | |
| Feb 2022 | 0 | 0 | 672 | |
| Mar 2022 | 0 | 0 | 744 | |
| Apr 2022 | 0 | 0 | 720 | |
| May 2022 | 0 | 0 | 744 | |
| Jun 2022 | 0 | 0 | 720 | |
| Jul 2022 | 0 | 0 | 744 | |
| Aug 2022 | 0 | 0 | 744 | |
| Sep 2022 | 0 | 0 | 720 | |
| Oct 2022 | 49 | 49 | 744 | |
| Nov 2022 | 74 | 74 | 720 | |
| Dec 2022 | 0 | 0 | 744 | |
| Jan 2023 | 0 | 0 | 744 | |
| Feb 2023 | 0 | 0 | 672 | |
| Mar 2023 | 0 | 0 | 744 | |
| Apr 2023 | 0 | 0 | 720 | |
| May 2023 | 0 | 0 | 744 | |
| Jun 2023 | 0 | 0 | 720 | |
| Jul 2023 | 0 | 0 | 744 | |
| Aug 2023 | 0 | 0 | 744 | |
| Sep 2023 | 0 | 0 | 720 | |
| Oct 2023 | 0 | 0 | 744 | |
| Nov 2023 | 0 | 0 | 720 | |
| Dec 2023 | 0 | 0 | 744 | |
| Jan 2024 | 0 | 0 | 744 | |
| Feb 2024 | 0 | 0 | 696 | |
| Mar 2024 | 0 | 0 | 744 | |
| Apr 2024 | 0 | 0 | 720 | |
| May 2024 | 0 | 0 | 744 | |
| Jun 2024 | 0 | 0 | 720 | |
| Jul 2024 | 58 | 58 | 744 | |
| Aug 2024 | 0 | 0 | 744 | |
| Sep 2024 | 0 | 0 | 720 | |
| Oct 2024 | 50 | 50 | 744 | |
| Nov 2024 | 38 | 38 | 720 | |
| Dec 2024 | 18 | 18 | 744 | |
| Jan 2025 | 0 | 0 | 744 | |
| Feb 2025 | 75 | 75 | 672 | |
| Mar 2025 | 79 | 79 | 744 | |
| Apr 2025 | 0 | 0 | 720 | |
| May 2025 | 0 | 0 | 744 | |
| Jun 2025 | 0 | 0 | 720 | |
| Jul 2025 | 0 | 0 | 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 | 50 | 50 | 744 | |
| Feb 2026 | 0 | 0 | 672 | |
| Mar 2026 | 0 | 0 | 744 | |
| Apr 2026 | 0 | 0 | 720 | |
| May 2026 | 0 | 0 | 744 | |
| Jun 2026 | 0 | 0 | 720 | |
| Jul 2026 | 0 | 0 | 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.
Sources: CT DEEP CSO/SSO dashboard; CT DEEP Sewage Right-to-Know annual reports. Covered 2022-01-01 to 2026-11-02.
Show table
| Month | Days with a discharge | Coverage |
|---|---|---|
| Jan 2022 | 0 | |
| Feb 2022 | 0 | |
| Mar 2022 | 0 | |
| Apr 2022 | 0 | |
| May 2022 | 0 | |
| Jun 2022 | 0 | |
| Jul 2022 | 0 | |
| Aug 2022 | 0 | |
| Sep 2022 | 0 | |
| Oct 2022 | 1 | |
| Nov 2022 | 2 | |
| Dec 2022 | 0 | |
| Jan 2023 | 0 | |
| Feb 2023 | 0 | |
| Mar 2023 | 0 | |
| Apr 2023 | 0 | |
| May 2023 | 0 | |
| Jun 2023 | 0 | |
| Jul 2023 | 0 | |
| Aug 2023 | 0 | |
| Sep 2023 | 0 | |
| Oct 2023 | 0 | |
| Nov 2023 | 0 | |
| Dec 2023 | 0 | |
| Jan 2024 | 0 | |
| Feb 2024 | 0 | |
| Mar 2024 | 0 | |
| Apr 2024 | 0 | |
| May 2024 | 0 | |
| Jun 2024 | 0 | |
| Jul 2024 | 3 | |
| Aug 2024 | 0 | |
| Sep 2024 | 0 | |
| Oct 2024 | 1 | |
| Nov 2024 | 1 | |
| Dec 2024 | 0 | |
| Jan 2025 | 0 | |
| Feb 2025 | 2 | |
| Mar 2025 | 2 | |
| Apr 2025 | 0 | |
| May 2025 | 0 | |
| Jun 2025 | 0 | |
| Jul 2025 | 0 | |
| Aug 2025 | 0 | |
| Sep 2025 | 0 | |
| Oct 2025 | 0 | |
| Nov 2025 | 0 | |
| Dec 2025 | 0 | |
| Jan 2026 | 1 | |
| Feb 2026 | 0 | |
| Mar 2026 | 0 | |
| Apr 2026 | 0 | |
| May 2026 | 0 | |
| Jun 2026 | 0 | |
| Jul 2026 | 0 | |
| Aug 2026 | 0 | |
| Sep 2026 | 0 | |
| Oct 2026 | 0 | |
| Nov 2026 | 0 |
Discharge events per year, 2016 to 2026
24 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
| Year | Combined sewer overflow | Sanitary sewer overflow | Bypass, blended or other | Total | Coverage |
|---|---|---|---|---|---|
| 2016 | 0 | 0 | 0 | 0 | Partly covered or sparse source |
| 2017 | 0 | 1 | 0 | 1 | |
| 2018 | 0 | 3 | 0 | 3 | |
| 2019 | 0 | 6 | 0 | 6 | |
| 2020 | 0 | 0 | 0 | 0 | |
| 2021 | 0 | 4 | 0 | 4 | Partly covered or sparse source |
| 2022 | 0 | 2 | 0 | 2 | |
| 2023 | 0 | 0 | 0 | 0 | |
| 2024 | 0 | 4 | 0 | 4 | |
| 2025 | 0 | 3 | 0 | 3 | |
| 2026 | 0 | 1 | 0 | 1 |
Reported volume per year
Gallons, summed from the 12 events that gave a number (12 did not).
- Partly covered or sparse source
12 of 24 events gave no volume as a number (10 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
| Year | Gallons | Events with a number | Events without | Coverage |
|---|---|---|---|---|
| 2016 | 0 | 0 | 0 | Partly covered or sparse source |
| 2017 | 0 | 1 | 0 | |
| 2018 | 200 | 2 | 1 | |
| 2019 | 0 | 0 | 6 | |
| 2020 | 0 | 0 | 0 | |
| 2021 | 0 | 0 | 4 | Partly covered or sparse source |
| 2022 | 150 | 1 | 1 | |
| 2023 | 0 | 0 | 0 | |
| 2024 | 263 | 4 | 0 | |
| 2025 | 750 | 3 | 0 | |
| 2026 | 500 | 1 | 0 |
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.
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
| Year | Hours under advisory | Share of the year | Coverage |
|---|---|---|---|
| 2016 | 0 | 0.0% | Partly covered or sparse source |
| 2017 | 49 | 0.6% | |
| 2018 | 99 | 1.1% | |
| 2019 | 198 | 2.3% | |
| 2020 | 0 | 0.0% | |
| 2021 | 99 | 1.1% | Partly covered or sparse source |
| 2022 | 123 | 1.4% | |
| 2023 | 0 | 0.0% | |
| 2024 | 163 | 1.9% | |
| 2025 | 154 | 1.8% | |
| 2026 | 50 | 0.7% |
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
| Month | Events | Years of records |
|---|---|---|
| Jan | 4 | 10 |
| Feb | 5 | 10 |
| Mar | 5 | 10 |
| Apr | 2 | 10 |
| May | 1 | 10 |
| Jun | 0 | 10 |
| Jul | 2 | 11 |
| Aug | 0 | 11 |
| Sep | 0 | 11 |
| Oct | 2 | 11 |
| Nov | 2 | 11 |
| Dec | 1 | 10 |
Discharge events by outfall
The 10 outfalls with the most events of 20, 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
| Outfall | Discharger | Events |
|---|---|---|
| Lateral - Public, 1 Trap Falls Road | Shelton | 2 |
| Sewer Main, 10 Silva Drive | Shelton | 2 |
| Manhole, 501 Bridgeport Ave/Woodland Mobile Home Park | Shelton | 2 |
| Manhole, 78 William Street | Shelton | 2 |
| Manhole, 20 Wakelee Ave, Shelton, CT | SHELTON | 1 |
| Manhole, 739 Long Hill Ave, Shelton, CT | SHELTON | 1 |
| Basement, 116-118 Maltby St, Shelton, CT | SHELTON | 1 |
| Manhole, 17 Coram Rd, Shelton, CT | SHELTON | 1 |
| Basement, 92 Wooster St, Shelton, CT | SHELTON | 1 |
| Sewer Main, 11 Birdseye Rd Ext, Shelton, CT | SHELTON | 1 |
| Other outfalls (10) | 10 |
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