U.S. COAST GUARD - BALTIMORE Y
NPDES ID: MD0067300
X — SNC: Effluent violation (non-monthly average limit)
The facility discharged more of a pollutant than its permit allows, measured over a period other than a monthly average.
This quarter: 3 effluent violations.
Violations
March 31, 2026
Copper, total [as Cu]
58% over limit
Discharged 0.0205 mg/L against a permitted limit of 0.013 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, total [as Zn]
94% over limit
Discharged 0.233 mg/L against a permitted limit of 0.12 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2025
Copper, total [as Cu]
109% over limit
Discharged 0.0272 mg/L against a permitted limit of 0.013 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, total [as Zn]
2% over limit
Discharged 0.122 mg/L against a permitted limit of 0.12 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2025
Zinc, total [as Zn]
283% over limit
Discharged 0.46 mg/L against a permitted limit of 0.12 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
650% over limit
Discharged 0.0975 mg/L against a permitted limit of 0.013 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
June 30, 2025
Zinc, total [as Zn]
635% over limit
Discharged 0.882 mg/L against a permitted limit of 0.12 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
3085% over limit
Discharged 0.414 mg/L against a permitted limit of 0.013 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2025
Zinc, total [as Zn]
1017% over limit
Discharged 1.34 mg/L against a permitted limit of 0.12 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
1108% over limit
Discharged 0.157 mg/L against a permitted limit of 0.013 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2024
Zinc, total [as Zn]
623% over limit
Discharged 0.868 mg/L against a permitted limit of 0.12 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
769% over limit
Discharged 0.113 mg/L against a permitted limit of 0.013 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (5 days ago)