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Maryland · Maryland (MDE)

Patapsco WWTP Collection System - Baltimore County

Permit MDC121601

—
No waterway impact reported
Reported events
140
Total volume
3.0M gal
Reached waterways
0 (0%)
Reporting since
2023

What caused the overflows

Other / Unknown
140

Reported overflow events (showing 140 of 140)

DateVolumeCauseReached waterReceiving water
Jun 9, 2026—Other / Unknown—Stonehouse Cove to Patapsco River
Jun 2, 202610 galOther / Unknown—nonw
May 26, 2026100 galOther / Unknown—Dogwood Run
May 23, 202610K galOther / Unknown—Jones Fall River
May 18, 202680 galOther / Unknown—Some of the sewage did reach Spring Branch, a waterway behind the private residence at 205 Cold Brook Rd.
May 14, 2026520 galOther / Unknown—Western Run
Apr 29, 2026100 galOther / Unknown—storm drain
Apr 28, 2026100 galOther / Unknown—storm drain (Gwynn's Falls)
Apr 22, 202610 galOther / Unknown—none
Apr 10, 202640 galOther / Unknown—Storm drain; nearest waterway UT to Cedar Branch, ~650 feet northwest
Mar 24, 202610K galOther / Unknown—unknown
Mar 24, 20262K galOther / Unknown—West Branch Herbert Run
Mar 21, 20262 galOther / Unknown—n/a
Mar 20, 20267 galOther / Unknown—none
Mar 1, 20263K galOther / Unknown—Nearest waterway is Gwynns Falls and an unnamed tributary to Gwynns Falls, both located west of the property.
Feb 22, 20265 galOther / Unknown—N/A
Feb 21, 202675 galOther / Unknown—None.
Feb 20, 202625 galOther / Unknown—N/A
Jan 15, 2026—Other / Unknown—none
Jan 12, 2026150 galOther / Unknown—storm drain ( Scotts Level Branch)
Jan 12, 202675 galOther / Unknown—Storm drain (Scotts Level Branch)
Jan 8, 202650 galOther / Unknown—Mr. Bamba, the property owner, stated that sewage discharged into grassy area and then into retaining pond (Frog Mortar Creek, use class I, confluent to Middle River, use class II)
Dec 29, 2025—Other / Unknown—not impacted (the area is in close proximity of Clement Cove and Peach-orchard Cove, confluent to Bear Creek)
Nov 25, 2025100 galOther / Unknown—Storm drain Dogwood Run
Nov 25, 202530 galOther / Unknown—side ditch
Nov 21, 20251K galOther / Unknown—Bens Run
Nov 21, 20251K galOther / Unknown—Bens Run
Nov 16, 2025250 galOther / Unknown—SSO release drained into a storm drain, which drains to Gwynn Falls (designated class II waters).
Oct 24, 202515 galOther / Unknown—None.
Oct 23, 2025250 galOther / Unknown—None.
Oct 20, 2025150 galOther / Unknown—Initial volume of water ran down the street and into a storm drain that leads to a large retention pond 250 ft away from the ARV vault.
Oct 15, 2025200 galOther / Unknown—Bill Branch
Oct 1, 2025350 galOther / Unknown—N/A
Sep 24, 202520 galOther / Unknown—None.
Aug 17, 20253K galOther / Unknown—Bear Creek
Jul 14, 202588K galOther / Unknown—Maiden Choice Creek
Jul 13, 202586K galOther / Unknown—Maiden Choice Creek
Jul 13, 202560 galOther / Unknown—None.
Jun 24, 2025550 galOther / Unknown—Gwynns Falls
May 30, 202540 galOther / Unknown—Herring Run
May 29, 2025260K galOther / Unknown—Maiden Choice Creek
May 28, 202535 galOther / Unknown—Storm drain
May 17, 202555 galOther / Unknown—N/A
May 14, 20256K galOther / Unknown—Maiden Choice Creek
May 12, 2025100 galOther / Unknown—Unnamed tributary that leads to Gwynns Fall
May 8, 2025100 galOther / Unknown—UT to Gwynns Falls, b/t confluence w/ Horsehead Branch and Scotts Level Branch
Apr 23, 202515 galOther / Unknown—N/A
Apr 15, 2025300 galOther / Unknown—Liberty Reservoir
Mar 30, 202550 galOther / Unknown—NA
Mar 30, 2025510 galOther / Unknown—Gwynns Falls (stated did not reach waterway, but large volume discharged)
Mar 29, 202525 galOther / Unknown—NA
Mar 25, 202515 galOther / Unknown—no
Mar 13, 202540 galOther / Unknown—none
Feb 22, 20255 galOther / Unknown—Groundwater, did not enter any bodies of water via surface flow
Feb 17, 20252K galOther / Unknown—UT to Patapsco River
Jan 22, 202515 galOther / Unknown—NA (nearest waterbody UT to Moores Branch)
Jan 12, 202530 galOther / Unknown—UT to Herring Run
Jan 9, 2025100 galOther / Unknown—NA (nearest waterway is UT to West Branch Herbert Run)
Dec 30, 202410 galOther / Unknown—N/A (watershed is Dead Run, confluent to Gwynns Falls)
Dec 24, 202415K galOther / Unknown—Mardella Branch
Dec 16, 202430 galOther / Unknown—N/A (Patapsco River watershed)
Dec 16, 202430 galOther / Unknown—N/A
Nov 25, 202417K galOther / Unknown—UT to Patapsco River
Nov 25, 202417K galOther / Unknown—Patapsco River
Nov 19, 2024200 galOther / Unknown—None.
Nov 18, 20245 galOther / Unknown—N/A
Nov 7, 20242K galOther / Unknown—Gwynns Falls
Nov 7, 20242K galOther / Unknown—None.
Oct 31, 202498K galOther / Unknown—West Branch
Oct 15, 2024550 galOther / Unknown—Tributary of the Patapsco River
Oct 14, 2024150 galOther / Unknown—Storm drain Roaches Run
Oct 11, 202450 galOther / Unknown—N/A
Oct 2, 202410 galOther / Unknown—none
Sep 26, 202417K galOther / Unknown—Maiden Choice Creek
Sep 19, 20242K galOther / Unknown—Jones Falls
Sep 15, 202435 galOther / Unknown—none
Aug 31, 2024300 galOther / Unknown—West Branch Herbert Run
Aug 19, 2024300 galOther / Unknown—Cedar Branch
Aug 18, 202498K galOther / Unknown—Maiden Choice Creek
Aug 12, 202460 galOther / Unknown—N/A
Jul 18, 202480 galOther / Unknown—Not applicable. No spill to surface waters or storm water.
May 30, 20244K galOther / Unknown—West Branch Herbert Run
May 27, 20243K galOther / Unknown—Maiden Choice Creek
May 21, 2024100 galOther / Unknown—N/A
May 2, 202475 galOther / Unknown—Dead Run - Leakin Park (Gwynns Falls)
Apr 3, 2024140K galOther / Unknown—Maidens Choice Creek
Apr 3, 202441K galOther / Unknown—Gwynns Falls
Apr 3, 20241K galOther / Unknown—West Branch Herbert Run
Apr 3, 202471K galOther / Unknown—Patapsco
Apr 3, 202450K galOther / Unknown—Gwynns Falls
Apr 2, 20247K galOther / Unknown—Gwynn Falls / Patapsco
Apr 2, 2024165K galOther / Unknown—Maidens Choice Creek
Apr 2, 202440 galOther / Unknown—N/A
Apr 2, 202440 galOther / Unknown—NA
Apr 2, 202421K galOther / Unknown—Patapsco River
Apr 2, 20244K galOther / Unknown—Gwynn Falls / Patapsco
Mar 12, 202475 galOther / Unknown—n/a
Mar 7, 20243K galOther / Unknown—West Branch Herbert Run
Mar 7, 20243K galOther / Unknown—West Branch Herbert Run
Feb 27, 2024100 galOther / Unknown—West Branch Herbert Run
Jan 31, 20242K galOther / Unknown—North Branch River
Jan 28, 202415K galOther / Unknown—Gwynn's Falls
Jan 28, 2024565 galOther / Unknown—Maiden Choice Creek
Jan 28, 202417K galOther / Unknown—Gwynns Falls
Jan 10, 2024300 galOther / Unknown—Herbert Run
Jan 10, 202445K galOther / Unknown—West Branch
Jan 9, 2024163K galOther / Unknown—Gwynns Falls
Jan 9, 2024172K galOther / Unknown—Gwynns Falls
Jan 9, 2024490K galOther / Unknown—Maidens Choice Creek
Jan 9, 202438K galOther / Unknown—Gwynns Falls
Jan 9, 202478K galOther / Unknown—Maidens Choice Creek
Dec 24, 202345 galOther / Unknown—Patapsco River or Possibly Back River
Dec 17, 2023107K galOther / Unknown—Gwynn's Falls
Dec 17, 202383K galOther / Unknown—Gwynn's Falls
Dec 17, 2023342K galOther / Unknown—Maiden's Choice Creek
Dec 17, 202320K galOther / Unknown—Herring Run
Dec 17, 2023111K galOther / Unknown—Herring Run
Dec 17, 202335K galOther / Unknown—Maidens Choice Creek
Nov 13, 2023—Other / Unknown—N/A
Oct 17, 2023—Other / Unknown—N/A
Oct 10, 2023150 galOther / Unknown—Lake Roland
Oct 4, 202375 galOther / Unknown—Power Mill Run
Sep 12, 20237K galOther / Unknown—Gwynns Falls
Sep 12, 20233K galOther / Unknown—Gwynns Falls
Sep 12, 20234K galOther / Unknown—Maidens Choice Creek
Sep 12, 20231K galOther / Unknown—Gwynns Falls
Aug 25, 2023875 galOther / Unknown—West Branch Herbert Run
Aug 16, 2023120 galOther / Unknown—Dead Run
Aug 7, 20234K galOther / Unknown—Gwynns Falls
Aug 7, 20238K galOther / Unknown—Gwynns Falls
Aug 7, 202320K galOther / Unknown—Gwynn's Falls
Aug 7, 202392 galOther / Unknown—Maidens Choice Creek
Jul 10, 20235 galOther / Unknown—N/A
Jun 27, 202310 galOther / Unknown—NA
Jun 22, 202335 galOther / Unknown—NA
Jun 15, 202335 galOther / Unknown—Cedar Branch
May 20, 202310 galOther / Unknown—n/a
May 12, 20233 galOther / Unknown—no
Apr 29, 202320 galOther / Unknown—N/A
Apr 6, 2023100 galOther / Unknown—N/A

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