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Maryland · Maryland (MDE)
John J. DiFonzo (Cumberland) WRF Collection System - Allegany County
Permit MDC121598
—
No waterway impact reported
Reported events
32
Total volume
16.9M gal
Reached waterways
0 (0%)
Reporting since
2023
What caused the overflows
Other / Unknown
32
Reported overflow events (showing 32 of 32)
| Date | Volume | Cause | Reached water | Receiving water |
|---|---|---|---|---|
| Jun 27, 2026 | 10K gal | Other / Unknown | — | Discharge entering the North Branch Potomac River (Use I-P) via constructed outfall. |
| May 24, 2026 | 446K gal | Other / Unknown | — | Sanitary sewer pipeline overflow. |
| Mar 11, 2026 | 103K gal | Other / Unknown | — | Wills Creek & Potomac River |
| Mar 5, 2026 | 63K gal | Other / Unknown | — | Potomac River & Wills Creek |
| Feb 21, 2026 | 62K gal | Other / Unknown | — | Willis Creek |
| Jan 5, 2026 | 900 gal | Other / Unknown | — | Potomac River. |
| Dec 19, 2025 | 85K gal | Other / Unknown | — | Wills Creek & Potomac River |
| Nov 18, 2025 | 116K gal | Other / Unknown | — | Wills Creek & Potomac River |
| Nov 3, 2025 | 13K gal | Other / Unknown | — | North Branch of the Potomac River |
| Aug 17, 2025 | 800 gal | Other / Unknown | — | Wills Creek |
| Jul 31, 2025 | 3.4M gal | Other / Unknown | — | Nearest waterway Wills Creek, use class IV-P & Potomac River |
| Jul 21, 2025 | — | Other / Unknown | — | The SSO is reported for an ongoing leak from the concrete wall of the underpass and was estimated to be 1 - 2 gallons per minute. The City reports the amount of the leak varies with storm intensity. The leak was first observed in March 2025. |
| Jul 13, 2025 | 37K gal | Other / Unknown | — | Wills Creek and Potomac River |
| Jul 12, 2025 | 19K gal | Other / Unknown | — | Potomac River & Wills Creek |
| May 13, 2025 | — | Other / Unknown | — | Elk Lick Run |
| May 13, 2025 | — | Other / Unknown | — | Elk Lick Run |
| May 13, 2025 | — | Other / Unknown | — | Jennings Run |
| May 13, 2025 | — | Other / Unknown | — | Wills Creek |
| May 13, 2025 | — | Other / Unknown | — | Georges Creek |
| Jan 24, 2025 | — | Other / Unknown | — | North Branch of Potomac River through the City of Cumberland's Combined Sewer. Notice, none of the reportd overflow entered waters of the State. Any of the SSO entered the City of Cumberland's Combined Sewer that is treated at the John J. Difonso WRF. |
| Dec 17, 2024 | 1.0M gal | Other / Unknown | — | Wills Creek |
| Sep 12, 2024 | 45K gal | Other / Unknown | — | Evitts Creek to North Branch of Potomac River |
| Jul 22, 2024 | 113K gal | Other / Unknown | — | Wills Creek to Potomac River |
| May 20, 2024 | — | Other / Unknown | — | SSO appeared to collect around the business location. Water ponded at several locations including the customer parking lot and rear garage lot. Water appears to have overflowed a manhole in the collection system of the John J. DiFonso WRF. |
| Jan 9, 2024 | 6.8M gal | Other / Unknown | — | Wills Creek to Potomac River |
| Nov 11, 2023 | 1K gal | Other / Unknown | — | North Branch of the Potomac River |
| Jun 16, 2023 | 2.8M gal | Other / Unknown | — | Wills & Evitts Creeks, North Branch of Potomac River. |
| Jun 12, 2023 | 1.4M gal | Other / Unknown | — | Wills Creek and Potomac River |
| Mar 24, 2023 | 84K gal | Other / Unknown | — | Georges Creek |
| Feb 27, 2023 | 81K gal | Other / Unknown | — | Jennings Run |
| Feb 27, 2023 | 81K gal | Other / Unknown | — | Wills Creek |
| Feb 22, 2023 | 1K gal | Other / Unknown | — | Wills Creek (63,400 gallons) Potomac River (1800 gallons) |
Source: Maryland (MDE). Volumes are utility-reported estimates. Some events lack precise coordinates or volumes.