NATIONAL INSTITUTES OF HEALTH
NPDES ID: MD0025496
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
Copper, total [as Cu]
142% over limit
Discharged 0.063 mg/L against a permitted limit of 0.026 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
172% over limit
Discharged 0.044 mg/L against a permitted limit of 0.0162 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Copper, total [as Cu]
123% over limit
Discharged 0.058 mg/L against a permitted limit of 0.026 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
159% over limit
Discharged 0.042 mg/L against a permitted limit of 0.0162 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Copper, total [as Cu]
181% over limit
Discharged 0.073 mg/L against a permitted limit of 0.026 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
184% over limit
Discharged 0.046 mg/L against a permitted limit of 0.0162 mg/L (MO AVG)
DMR, Limited - Numeric Violation
June 30, 2025
Copper, total [as Cu]
196% over limit
Discharged 0.077 mg/L against a permitted limit of 0.026 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
153% over limit
Discharged 0.041 mg/L against a permitted limit of 0.0162 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Copper, total [as Cu]
35% over limit
Discharged 0.035 mg/L against a permitted limit of 0.026 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
67% over limit
Discharged 0.027 mg/L against a permitted limit of 0.0162 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Copper, total [as Cu]
79% over limit
Discharged 0.0466 mg/L against a permitted limit of 0.026 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
81% over limit
Discharged 0.0293 mg/L against a permitted limit of 0.0162 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
September 30, 2024
Copper, total [as Cu]
47% over limit
Discharged 0.0382 mg/L against a permitted limit of 0.026 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
102% over limit
Discharged 0.0328 mg/L against a permitted limit of 0.0162 mg/L (MX MO AV)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (5 days ago)