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Maryland · Maryland (MDE)

Blue Plains WWTP Collection System - WSSC (Mo. Co.)

Permit MDC021199

—
No waterway impact reported
Reported events
120
Total volume
61K gal
Reached waterways
0 (0%)
Reporting since
2023

What caused the overflows

Other / Unknown
120

Reported overflow events (showing 120 of 120)

DateVolumeCauseReached waterReceiving water
Jun 28, 2026250 galOther / Unknown—The Potomac River
Jun 25, 2026711 galOther / Unknown—Not reported to be reaching storm drains or any waterways. Cabin John
Jun 22, 2026774 galOther / Unknown—Rock Creek.
Jun 16, 2026351 galOther / Unknown—Cabin John
Jun 8, 2026128 galOther / Unknown—Cabin John
May 23, 2026391 galOther / Unknown—storm drain, Sligo Creek
Apr 25, 202668 galOther / Unknown—Rock Creek
Apr 22, 2026480 galOther / Unknown—Cabin John Creek
Apr 9, 2026197 galOther / Unknown—Cabin John
Apr 8, 2026185 galOther / Unknown—Rock Creek
Apr 7, 2026100 galOther / Unknown—Cabin John
Mar 28, 2026480 galOther / Unknown—Mill Creek
Mar 23, 2026298 galOther / Unknown—Rock Creek
Mar 20, 20262K galOther / Unknown—contained in ditch
Mar 14, 2026177 galOther / Unknown—Cabin John Creek
Feb 28, 20261 galOther / Unknown—N/a just reported to storm drain, Broad Creek
Feb 25, 20261K galOther / Unknown—Discharge is entering the storm drain; the nearest waterway is an Unknown Tributary to Paint Branch.
Feb 9, 2026424 galOther / Unknown—Seneca Creek
Jan 23, 2026293 galOther / Unknown—Northwest Branch Anacostia River, use IV
Jan 22, 202656 galOther / Unknown—Pavement and into a Storm drain that outfalls into northwest Branch.
Jan 3, 20262K galOther / Unknown—Paint Branch
Jan 2, 202680 galOther / Unknown—Watts Branch
Dec 30, 2025460 galOther / Unknown—Cabin John
Dec 24, 2025621 galOther / Unknown—The SSO discharged into UT to Cabin Branch, designated use class I-P waterway.
Dec 20, 2025100 galOther / Unknown—Storm drain
Dec 19, 2025119 galOther / Unknown—Seneca Creek
Dec 16, 2025148 galOther / Unknown—The WSSC representative said that the SSO was not entering into a waterway. They said that the discharge was just entering into a grassy area. They also said that they did not know if the discharge was traveling into a storm drain, ditch, etc.
Dec 2, 2025265 galOther / Unknown—Seneca Creek
Nov 19, 2025490 galOther / Unknown—Muddy Branch
Nov 12, 202592 galOther / Unknown—Sligo Creek
Nov 9, 202588 galOther / Unknown—Little Falls.
Oct 22, 202595 galOther / Unknown—Paint Branch
Oct 19, 2025372 galOther / Unknown—Little Falls
Oct 1, 202550 galOther / Unknown—Northwest Branch
Sep 28, 2025983 galOther / Unknown—Seneca Creek
Sep 16, 202550 galOther / Unknown—Rock Run
Sep 11, 2025660 galOther / Unknown—Northwest Branch
Sep 2, 2025105 galOther / Unknown—Rock Creek
Sep 2, 2025364 galOther / Unknown—nearest waterway to the site is Cabin John Creek
Aug 26, 20254K galOther / Unknown—Rock Creek
Aug 6, 20254K galOther / Unknown—Rock Creek
Jul 24, 2025408 galOther / Unknown—Northwest Branch
Jul 22, 2025230 galOther / Unknown—Cabin John
Jul 15, 2025400 galOther / Unknown—Storm Drain
Jul 3, 2025562 galOther / Unknown—Buck Branch Creek
Jun 18, 2025—Other / Unknown—Potomac River
Jun 13, 20250 galOther / Unknown—Cabin John
Jun 6, 20251K galOther / Unknown—Sligo Creek
Jun 4, 20257 galOther / Unknown—Cabin John
May 29, 2025135 galOther / Unknown—Little Falls
Apr 29, 2025140 galOther / Unknown—N/A
Mar 31, 2025450 galOther / Unknown—N/A
Mar 26, 2025969 galOther / Unknown—N/A
Mar 23, 202569 galOther / Unknown—n/a
Mar 13, 2025253 galOther / Unknown—Lake of Kings
Mar 8, 2025110 galOther / Unknown—N/A
Feb 20, 2025—Other / Unknown—storm drain leading to Gunner's Branch
Feb 8, 2025666 galOther / Unknown—None, entered woods only
Feb 7, 20251K galOther / Unknown—creek that outfalls into Rock Creek
Feb 5, 2025375 galOther / Unknown—Unnamed creek that leads to Rock Creek
Feb 3, 2025159 galOther / Unknown—tributary of Cabin John Creek
Jan 30, 2025801 galOther / Unknown—James Creek
Jan 29, 202593 galOther / Unknown—Little Falls Basin
Jan 21, 2025210 galOther / Unknown—N/A
Jan 21, 20252K galOther / Unknown—Seneca Creek
Jan 16, 2025517 galOther / Unknown—Paint Branch Creek
Jan 4, 2025437 galOther / Unknown—C&O Canal
Jan 2, 20251K galOther / Unknown—tributary of Muddy Branch Creek
Dec 31, 202446 galOther / Unknown—Sligo Creek
Dec 30, 2024288 galOther / Unknown—Rock Creek 2 gallons per minute
Dec 24, 2024366 galOther / Unknown—tributary of Muddy Branch
Dec 3, 2024106 galOther / Unknown—Seneca Creek
Nov 25, 2024921 galOther / Unknown—Rock Run
Nov 25, 2024921 galOther / Unknown—Rock Run Creek
Nov 22, 2024500 galOther / Unknown—Watts Branch
Nov 22, 2024500 galOther / Unknown—Watts Branch
Nov 19, 2024470 galOther / Unknown—Muddy Branch
Nov 7, 202456 galOther / Unknown—Cabin John
Nov 7, 202456 galOther / Unknown—Was contained within grassy area, No discharge into the State Waters
Oct 18, 20241K galOther / Unknown—Rock Creek
Sep 20, 2024249 galOther / Unknown—Sligo Creek
Sep 18, 2024170 galOther / Unknown—Storm drain
Sep 16, 2024750 galOther / Unknown—Broad Creek
Sep 14, 202483 galOther / Unknown—Sligo Creek
Sep 11, 2024344 galOther / Unknown—Rock Creek
Aug 4, 2024805 galOther / Unknown—UT to NW Br. Anacostia River, b/t confluence w/ Bel Pre Creek and Sligo Creek is the closest waterway.
Jul 13, 2024963 galOther / Unknown—Northwest Branch
Jul 9, 202446 galOther / Unknown—Muddy Branch
Jun 24, 2024258 galOther / Unknown—North Branch Rock Creek
Jun 9, 2024374 galOther / Unknown—Cabin John
May 21, 202414 galOther / Unknown—Rock Creek
Apr 4, 2024561 galOther / Unknown—Storm Drain
Mar 25, 2024—Other / Unknown—N/A. Sewage did not reach waters of the state.
Mar 22, 2024446 galOther / Unknown—Rock Creek
Mar 19, 2024726 galOther / Unknown—Storm drain discharges to Little Falls
Feb 26, 202465 galOther / Unknown—N/A, Only reached street, No waterway involved or affected. (less than 1 gal per minute)
Feb 15, 2024175 galOther / Unknown—tributary of Little Paint Branch
Feb 6, 202410 galOther / Unknown—n/a
Jan 13, 2024228 galOther / Unknown—Cabin John Creek
Nov 14, 202374 galOther / Unknown—Muddy Branch
Oct 3, 2023150 galOther / Unknown—Sligo Creek
Sep 17, 2023267 galOther / Unknown—Northwest Branch
Aug 21, 20233K galOther / Unknown—Forest Glen Creek
Jul 20, 2023624 galOther / Unknown—Little Falls Branch
Jul 20, 2023624 galOther / Unknown—Little Falls Branch
Jun 19, 20235 galOther / Unknown—N/A
Jun 5, 2023133 galOther / Unknown—Rock Creek
May 2, 202372 galOther / Unknown—ROCK CREEK
Apr 6, 2023182 galOther / Unknown—No receiving waterway. Only onto grassy area.
Mar 30, 2023131 galOther / Unknown—Storm drain in Paint Branch Basin
Mar 26, 2023763 galOther / Unknown—N/A
Mar 26, 202328 galOther / Unknown—N/A
Mar 23, 2023148 galOther / Unknown—N/A
Mar 20, 20233K galOther / Unknown—Paint Branch Basin
Mar 20, 202315 galOther / Unknown—NA
Mar 17, 20232K galOther / Unknown—tributary of Cabin John Creek
Mar 1, 2023750 galOther / Unknown—Lower Potomac River Tidal
Feb 28, 2023394 galOther / Unknown—Potomac River
Feb 26, 2023306 galOther / Unknown—Northwest Branch Creek
Feb 22, 2023166 galOther / Unknown—Rock Creek

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