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Maryland · Maryland (MDE)

Back River WWTP Collection System - Baltimore County

Permit MDC121555

—
No waterway impact reported
Reported events
124
Total volume
2.4M gal
Reached waterways
0 (0%)
Reporting since
2023

What caused the overflows

Other / Unknown
124

Reported overflow events (showing 124 of 124)

DateVolumeCauseReached waterReceiving water
Jun 26, 202630 galOther / Unknown—sewer main hole, estimated to be over 100 feet from surrounding storm drains. Nearest waterway is an unnamed tributary to Gunpowder Falls, Use I
Jun 3, 202640 galOther / Unknown—Storm drains
May 24, 2026—Other / Unknown—Strom drain to Chinquapin Run to Back River
May 22, 202615 galOther / Unknown—storm drain
May 19, 20265 galOther / Unknown—none
May 2, 20261 galOther / Unknown—Bear Creek
Apr 7, 20262 galOther / Unknown—None
Apr 1, 2026738 galOther / Unknown—Herring Run
Mar 25, 202630 galOther / Unknown—none
Mar 20, 20262K galOther / Unknown—Northwest Harbor
Mar 13, 2026100 galOther / Unknown—Redhouse Creek
Mar 10, 2026600 galOther / Unknown—none
Feb 20, 202615 galOther / Unknown—Cleanour
Feb 16, 20261K galOther / Unknown—none
Feb 14, 2026400 galOther / Unknown—Hopkins Creek
Feb 8, 20265 galOther / Unknown—N/A
Feb 7, 202610 galOther / Unknown——
Jan 21, 2026200 galOther / Unknown—none
Dec 29, 2025150 galOther / Unknown—None.
Dec 22, 2025150 galOther / Unknown—None.
Dec 22, 202580 galOther / Unknown—None.
Dec 12, 202525 galOther / Unknown—storm drain
Nov 21, 2025100 galOther / Unknown—N/A
Nov 14, 20252K galOther / Unknown—Lynch Cove
Nov 13, 20252K galOther / Unknown—Stormwater drain into Lynch Cove
Nov 8, 202580 galOther / Unknown—N/A
Oct 31, 2025895 galOther / Unknown—Stansbury Creek
Oct 1, 2025100 galOther / Unknown—N/A
Oct 1, 2025350 galOther / Unknown—no
Sep 30, 2025200 galOther / Unknown—Ruxton Run
Sep 6, 2025250 galOther / Unknown—Red House Run
Sep 6, 2025125 galOther / Unknown—Stemmers Run
Sep 2, 2025200 galOther / Unknown—Not going into any waters of the state
Aug 9, 2025150 galOther / Unknown—Middle River
Aug 6, 2025315 galOther / Unknown—None.
Jul 25, 20252 galOther / Unknown—none
Jul 14, 202560 galOther / Unknown—unknown if SSO reached receiving water.
Jul 1, 20254K galOther / Unknown—Bear Creek
Jun 3, 20253 galOther / Unknown—N/A
May 30, 202530 galOther / Unknown—Middle River
May 16, 2025753K galOther / Unknown—Bullneck Creek
May 5, 202570 galOther / Unknown—None
Apr 29, 2025100 galOther / Unknown—N/A
Apr 24, 2025100 galOther / Unknown—Did not enter body of water
Apr 24, 2025100 galOther / Unknown—originally reported as entering a storm drain (lower gunpowder Falls); final report says did not enter a body of water
Apr 2, 2025100 galOther / Unknown—Back River (UT to Redhouse Creek)
Mar 30, 202570 galOther / Unknown—Claim NA but also mitigation was washing it down the street.
Mar 17, 202580 galOther / Unknown—N/A
Mar 5, 2025125 galOther / Unknown—Herring Run B (sub shed)
Mar 1, 202560 galOther / Unknown—none
Feb 15, 2025200 galOther / Unknown—Scotts Level Branch
Feb 14, 20255K galOther / Unknown—Bens Run
Jan 10, 2025200 galOther / Unknown—Storm drain
Jan 5, 20253K galOther / Unknown—Middle River
Nov 7, 202420 galOther / Unknown—N/A
Oct 28, 2024300 galOther / Unknown—Minebank Run
Oct 5, 2024100 galOther / Unknown—Released into a parking lot and flowed into a nearby a storm drain. Unsure extent of sewage that reached the storm drain. Address is nearest to the Longquarter Branch, Loch Raven Reservoir watershed.
Aug 10, 20243K galOther / Unknown—Back River storm drain
Aug 3, 202425 galOther / Unknown—NA
Aug 3, 202425 galOther / Unknown—None.
Aug 3, 2024197K galOther / Unknown—Moores Run
Jul 30, 20245 galOther / Unknown—N/A
Jul 16, 2024100 galOther / Unknown—n/a
Jul 1, 202410 galOther / Unknown—NA
Jun 8, 202420 galOther / Unknown—No contact with waters of the State
Jun 2, 202440 galOther / Unknown—Jennifer Run
May 21, 202420 galOther / Unknown—none
Apr 28, 202430 galOther / Unknown—sewage entered inlet DIP029275; unknown body of water
Apr 17, 2024750 galOther / Unknown—O'Brian's Run
Mar 21, 2024900 galOther / Unknown—n/a
Mar 14, 202415 galOther / Unknown—N/A
Mar 14, 2024150 galOther / Unknown—N/A
Mar 14, 202415 galOther / Unknown—NA
Mar 14, 2024180 galOther / Unknown—N/A
Mar 7, 202450 galOther / Unknown—None
Mar 4, 2024100 galOther / Unknown—N/A (Chestnut Cove)
Feb 27, 202420 galOther / Unknown—N/A
Feb 22, 20243K galOther / Unknown—Red House Run
Feb 14, 20245 galOther / Unknown—none
Feb 4, 20243K galOther / Unknown—N/A
Feb 1, 2024500 galOther / Unknown—Sediment Pond
Jan 26, 2024250 galOther / Unknown—Entered a stream that flows into Bear Creek.
Jan 9, 2024177K galOther / Unknown—Herring Run
Jan 9, 202426K galOther / Unknown—Shallow Creek
Jan 9, 202419K galOther / Unknown—Chestnut Cove
Jan 9, 2024114K galOther / Unknown—Back River
Jan 9, 2024813K galOther / Unknown—Middle River
Jan 9, 202481K galOther / Unknown—Herring Run
Jan 5, 2024600 galOther / Unknown—Long Quarter Branch
Dec 31, 20231K galOther / Unknown—Stemmers Run
Dec 28, 2023—Other / Unknown—Sewage did drain into a storm drains that discharge into White Marsh Run several hundred feet away from the property or location of the SSO.
Dec 27, 202327K galOther / Unknown—Herring Run
Dec 27, 2023841 galOther / Unknown—Herring Run
Nov 14, 202380 galOther / Unknown—Long Quarters Branch
Nov 6, 202320 galOther / Unknown—n/a
Oct 23, 20234 galOther / Unknown—Receiving waterway would be Brien Run that is connected to Back River, none went into storm drain or stream, sewage overflowed onto a grassy area
Oct 17, 2023900 galOther / Unknown—N/A
Sep 28, 20235 galOther / Unknown—NA
Sep 24, 20230 galOther / Unknown—n/a - was reported to be fully contained.
Sep 12, 202314K galOther / Unknown—Herring Run
Sep 12, 202338K galOther / Unknown—Herring Run
Aug 22, 20234K galOther / Unknown—Old Row Bay
Aug 15, 20234 galOther / Unknown—none
Aug 7, 202324K galOther / Unknown—Herring Run
Aug 7, 202316K galOther / Unknown—Herring Run
Jul 31, 202330 galOther / Unknown—NA (Lower Gunpowder Falls)
Jul 25, 2023240 galOther / Unknown—CHESAPEAKE BAY
Jul 8, 202350K galOther / Unknown—Gunpowder River
Jul 5, 202380 galOther / Unknown—N/A
Jul 5, 202360 galOther / Unknown—N/A
Jul 4, 202360 galOther / Unknown—Big GUNPOWDER FALLS
Jul 3, 202322K galOther / Unknown—HERRING RUN
Jun 16, 2023—Other / Unknown—Big Gunpowder Falls
Jun 14, 20232K galOther / Unknown—WHITE MARSH RUN
Jun 2, 202315 galOther / Unknown—Scotts Level Branch
May 17, 20232 galOther / Unknown—NA
May 14, 202350 galOther / Unknown—NA
May 11, 2023300 galOther / Unknown—N/A
May 4, 202360 galOther / Unknown—Honeygo Run
May 3, 2023240 galOther / Unknown—Towson Run
Apr 25, 202350 galOther / Unknown—Back River
Apr 11, 202320 galOther / Unknown—NA
Mar 6, 202380 galOther / Unknown—Bear Creek
Mar 6, 2023200 galOther / Unknown—Goodwin Run

Source: Maryland (MDE). Volumes are utility-reported estimates. Some events lack precise coordinates or volumes.