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Maryland · Maryland (MDE)

Patapsco WWTP Collection System - Baltimore City

Permit n/a

—
No waterway impact reported
Reported events
543
Total volume
35.8M gal
Reached waterways
0 (0%)
Reporting since
2023

What caused the overflows

Other / Unknown
543

Reported overflow events (showing 200 of 543)

DateVolumeCauseReached waterReceiving water
Jun 10, 20262 galOther / Unknown—N/A
Jun 10, 20263 galOther / Unknown—N/A
Jun 9, 20261 galOther / Unknown—N/A
Jun 9, 20266K galOther / Unknown—Curtis Bay
Jun 8, 20260 galOther / Unknown—none
May 27, 20262 galOther / Unknown—N/A
May 25, 202687 galOther / Unknown—Western Run
May 24, 2026440K galOther / Unknown—Herring Run, Use IV waterway.
May 23, 20263 galOther / Unknown—N/A
May 23, 2026180K galOther / Unknown—Herring Run River
May 20, 20261 galOther / Unknown—N/A
May 19, 20261 galOther / Unknown—N/A
May 13, 20262 galOther / Unknown—N/A
May 12, 20262 galOther / Unknown—N/A
May 12, 20262 galOther / Unknown—N/A
May 11, 2026508 galOther / Unknown—Jones Falls
May 11, 20263 galOther / Unknown—N/A
May 7, 20261K galOther / Unknown—Gwynns Falls
May 6, 20261 galOther / Unknown—N/A
May 6, 20265 galOther / Unknown—Baltimore Harbor
May 5, 20261 galOther / Unknown—N/A
May 1, 20261 galOther / Unknown—N/A
Apr 29, 20262 galOther / Unknown—N/A
Apr 24, 20261 galOther / Unknown—N/A
Apr 24, 202610 galOther / Unknown—Stony Run
Apr 23, 20261K galOther / Unknown—Maiden Choice Run
Apr 23, 20262K galOther / Unknown—Gwynns Falls
Apr 22, 20261 galOther / Unknown—N/A
Apr 22, 20265 galOther / Unknown—Gwynn Falls
Apr 21, 20263 galOther / Unknown—N/A
Apr 19, 2026134 galOther / Unknown—storm drain
Apr 17, 2026159 galOther / Unknown—N/A
Apr 16, 20261 galOther / Unknown—N/A
Apr 15, 20261 galOther / Unknown—N/A
Apr 14, 2026966 galOther / Unknown—Manhole
Apr 14, 2026333 galOther / Unknown—N/A
Apr 14, 202610 galOther / Unknown—Baltimore Harbor
Apr 12, 20262 galOther / Unknown—N/A
Apr 11, 20261 galOther / Unknown—N/A
Apr 11, 2026675 galOther / Unknown—Storm drain; Jones Falls, from confluence w/ Western Run to confluence w/ Stony Run use IV ~300 ft south of overflow site
Apr 9, 20261K galOther / Unknown—Maiden Choice Run (Use I waterway) Runs underneath Pen Lucy Road next to the intersection between Pen Lucy Road and Uplands Parkway.
Apr 9, 20261K galOther / Unknown—Storm drain
Apr 8, 20262 galOther / Unknown—N/A
Apr 3, 20261 galOther / Unknown—N/A
Apr 2, 20266K galOther / Unknown—Northwest Harbor
Mar 31, 20261 galOther / Unknown—N/A
Mar 30, 20261 galOther / Unknown—N/A
Mar 28, 20263 galOther / Unknown—N/A
Mar 27, 202650 galOther / Unknown—nearby stormdrain
Mar 27, 202650 galOther / Unknown—Tiffany Run
Mar 26, 20262 galOther / Unknown—N/A
Mar 26, 20261 galOther / Unknown—N/A
Mar 25, 20261 galOther / Unknown—N/A
Mar 25, 20262 galOther / Unknown—N/A
Mar 24, 2026137 galOther / Unknown—N/A
Mar 23, 2026130 galOther / Unknown—N/A
Mar 23, 20261 galOther / Unknown—N/A
Mar 21, 20261 galOther / Unknown—N/A
Mar 21, 20261 galOther / Unknown—N/A
Mar 21, 2026162 galOther / Unknown—N/A
Mar 21, 20262 galOther / Unknown—N/A
Mar 20, 20261 galOther / Unknown—N/A
Mar 15, 202698 galOther / Unknown—N/A
Mar 15, 2026194 galOther / Unknown—N/A
Mar 14, 202610 galOther / Unknown—Groundwater
Mar 13, 20261 galOther / Unknown—storm drain
Mar 10, 2026280 galOther / Unknown—none
Mar 9, 20262 galOther / Unknown—none
Mar 9, 20263 galOther / Unknown—none
Mar 6, 20262 galOther / Unknown—none
Mar 5, 20260 galOther / Unknown—no
Feb 27, 20261K galOther / Unknown—Western Run
Feb 23, 20262 galOther / Unknown—N/A
Feb 23, 20262 galOther / Unknown—N/A
Feb 22, 20265 galOther / Unknown—N/A
Feb 21, 20261 galOther / Unknown—N/A
Feb 20, 2026—Other / Unknown—N/A
Feb 20, 2026439 galOther / Unknown—Gwynns Falls
Feb 20, 202610K galOther / Unknown—N/A
Feb 19, 20261 galOther / Unknown—N/A
Feb 18, 20263 galOther / Unknown—N/A
Feb 15, 20260 galOther / Unknown—N/A
Feb 15, 20261 galOther / Unknown—N/A
Feb 6, 20261K galOther / Unknown—Jones Falls
Feb 3, 20267K galOther / Unknown—Gwynns Falls
Feb 3, 2026600 galOther / Unknown—Stony Run
Feb 2, 202620K galOther / Unknown—Stony Run
Jan 27, 202620 galOther / Unknown—Nearest waterbody is Jones Falls
Jan 27, 202631K galOther / Unknown—Dead Run, in the Gwynn Falls watershed.
Jan 24, 20263 galOther / Unknown—N/A
Jan 21, 20262 galOther / Unknown—N/A
Jan 21, 20267K galOther / Unknown—N/A
Jan 20, 202611K galOther / Unknown—Gwynns Falls
Jan 20, 2026314 galOther / Unknown—N/A
Jan 16, 20262 galOther / Unknown—N/A
Jan 15, 20265 galOther / Unknown—storm drain
Jan 15, 2026259 galOther / Unknown—N/A
Jan 12, 202610 galOther / Unknown—storm drain
Jan 10, 2026—Other / Unknown—None
Jan 8, 20265 galOther / Unknown—storm drain
Jan 7, 202685 galOther / Unknown—none
Jan 7, 20269K galOther / Unknown—Herring Run
Jan 6, 20262 galOther / Unknown—storm drain
Jan 6, 20263K galOther / Unknown—storm drain underground
Jan 6, 20260 galOther / Unknown—Cleanout
Jan 5, 20261 galOther / Unknown—none
Jan 2, 20260 galOther / Unknown—no
Jan 2, 20261 galOther / Unknown—N/A
Jan 2, 20261 galOther / Unknown—N/A
Dec 30, 20251 galOther / Unknown—N/A
Dec 29, 20251 galOther / Unknown—N/A
Dec 28, 20251 galOther / Unknown—N/A
Dec 27, 20252 galOther / Unknown—N/A
Dec 27, 20251 galOther / Unknown—N/A
Dec 25, 20251 galOther / Unknown—N/A
Dec 24, 202589 galOther / Unknown—N/A
Dec 23, 2025204 galOther / Unknown—Gwynns Falls
Dec 21, 20251 galOther / Unknown—N/A
Dec 20, 20253 galOther / Unknown—N/A
Dec 18, 2025850 galOther / Unknown—Gwynns Falls
Dec 17, 20251 galOther / Unknown—N/A
Dec 16, 202521K galOther / Unknown—Gwynns Falls
Dec 15, 2025140 galOther / Unknown—N/A
Dec 15, 20251 galOther / Unknown—N/A
Dec 15, 2025608 galOther / Unknown—N/A
Dec 15, 2025386 galOther / Unknown—N/A
Dec 13, 20255 galOther / Unknown—Gwynns Falls
Dec 13, 20255 galOther / Unknown—Gwynns Falls
Dec 13, 20251 galOther / Unknown—N/A
Dec 12, 2025585 galOther / Unknown—Gwynns Falls
Dec 10, 202581 galOther / Unknown—none
Dec 8, 2025151 galOther / Unknown—N/A
Dec 8, 20252 galOther / Unknown—N/A
Dec 8, 202532 galOther / Unknown—N/A
Dec 6, 202593 galOther / Unknown—N/A
Dec 3, 20251 galOther / Unknown—N/A
Dec 3, 20251 galOther / Unknown—N/A
Dec 2, 20253 galOther / Unknown—N/A
Dec 1, 2025299 galOther / Unknown—Tiffany Run
Nov 30, 2025742 galOther / Unknown—N/A
Nov 28, 20251 galOther / Unknown—N/A
Nov 26, 20251 galOther / Unknown—N/A
Nov 25, 20252 galOther / Unknown—N/A
Nov 25, 2025166 galOther / Unknown—Gwynns Falls
Nov 24, 2025103 galOther / Unknown—N/A
Nov 24, 202562 galOther / Unknown—N/A
Nov 21, 2025136 galOther / Unknown—storm drain
Nov 21, 202590 galOther / Unknown—Gwynns Falls
Nov 21, 2025115 galOther / Unknown—Gwynns Falls
Nov 21, 2025176 galOther / Unknown—Jones Falls
Nov 19, 2025426 galOther / Unknown—Gwynns Falls
Nov 19, 20253K galOther / Unknown—N/A
Nov 19, 2025316 galOther / Unknown—Gwynns Falls
Nov 17, 20253 galOther / Unknown—N/A
Nov 17, 20251 galOther / Unknown—N/A
Nov 17, 20255 galOther / Unknown—Tiffany Run
Nov 16, 20255K galOther / Unknown—N/A
Nov 15, 2025485 galOther / Unknown—storm drain to Gwynns Falls
Nov 14, 20255K galOther / Unknown—Patapsco River
Nov 14, 2025360 galOther / Unknown—Jones Falls.
Nov 14, 20251K galOther / Unknown—Jones Falls
Nov 13, 202541K galOther / Unknown—Gwynns Falls
Nov 12, 20251.7M galOther / Unknown—Storm drain/Jones Falls
Nov 11, 20253 galOther / Unknown—N/A
Nov 8, 20251 galOther / Unknown—N/A
Nov 7, 20252 galOther / Unknown—N/A
Nov 6, 20250 galOther / Unknown—no
Nov 6, 2025174 galOther / Unknown—N/A
Nov 5, 20251 galOther / Unknown—N/A
Nov 4, 2025625 galOther / Unknown—N/A
Nov 3, 20251 galOther / Unknown—N/A
Nov 1, 20252 galOther / Unknown—N/A
Oct 30, 202510K galOther / Unknown—Patapsco River
Oct 29, 20251 galOther / Unknown—N/A
Oct 29, 20252K galOther / Unknown—Stony Run
Oct 27, 20251 galOther / Unknown—N/A
Oct 27, 20251 galOther / Unknown—N/A
Oct 26, 20251 galOther / Unknown—N/A
Oct 25, 20251 galOther / Unknown—N/A
Oct 23, 202556 galOther / Unknown—Jones Falls
Oct 21, 20254 galOther / Unknown—N/A
Oct 20, 2025112 galOther / Unknown—None
Oct 20, 20251 galOther / Unknown—N/A
Oct 16, 20252K galOther / Unknown—Jones Falls
Oct 12, 20255 galOther / Unknown—N/A
Oct 10, 20251 galOther / Unknown—N/A
Oct 2, 20251 galOther / Unknown—N/A
Sep 29, 20257K galOther / Unknown—Baltimore Harbor
Sep 25, 20251 galOther / Unknown—N/A
Sep 23, 20251 galOther / Unknown—N/A
Sep 23, 20251K galOther / Unknown—Tiffany Run
Sep 23, 2025160 galOther / Unknown—N/A
Sep 22, 2025485 galOther / Unknown—Gwynns Falls
Sep 22, 202570 galOther / Unknown—None.
Sep 20, 20252 galOther / Unknown—N/A
Sep 18, 20252K galOther / Unknown—Jones Falls
Sep 13, 2025590 galOther / Unknown—Did not reach waters of the state. Discharge to street only.
Sep 12, 20251 galOther / Unknown—N/A
Sep 10, 20251 galOther / Unknown—N/A
Sep 10, 20251 galOther / Unknown—N/A

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