POTOMAC RIVER WTP
NPDES ID: WVG640112
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
Violations
March 31, 2026
Aluminum, total recoverable
49% over limit
Discharged 1.12 mg/L against a permitted limit of 0.75 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Aluminum, total recoverable
9% over limit
Discharged 1.64 mg/L against a permitted limit of 1.5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Aluminum, total recoverable
119% over limit
Discharged 1.64 mg/L against a permitted limit of 0.75 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Aluminum, total recoverable
1001% over limit
Discharged 8.26 mg/L against a permitted limit of 0.75 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Aluminum, total recoverable
820% over limit
Discharged 13.8 mg/L against a permitted limit of 1.5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
June 30, 2025
Aluminum, total recoverable
26% over limit
Discharged 0.944 mg/L against a permitted limit of 0.75 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Aluminum, total recoverable
61% over limit
Discharged 2.42 mg/L against a permitted limit of 1.5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Aluminum, total recoverable
223% over limit
Discharged 2.42 mg/L against a permitted limit of 0.75 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Aluminum, total recoverable
19% over limit
Discharged 1.78 mg/L against a permitted limit of 1.5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Aluminum, total recoverable
137% over limit
Discharged 1.78 mg/L against a permitted limit of 0.75 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2024
Aluminum, total recoverable
2% over limit
Discharged 1.53 mg/L against a permitted limit of 1.5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Aluminum, total recoverable
104% over limit
Discharged 1.53 mg/L against a permitted limit of 0.75 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (4 days ago)