BULLSKIN 1 MINE
NPDES ID: PA0251658
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
This quarter: 1 single-event violation.
Violations
March 31, 2026
Aluminum, total [as Al]
233% over limit
Discharged 2.5 mg/L against a permitted limit of 0.75 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
7% over limit
Discharged 37.5 mg/L against a permitted limit of 35 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Aluminum, total [as Al]
140% over limit
Discharged 1.8 mg/L against a permitted limit of 0.75 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Aluminum, total [as Al]
233% over limit
Discharged 2.5 mg/L against a permitted limit of 0.75 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2026
Aluminum, total [as Al]
100% over limit
Discharged 1.5 mg/L against a permitted limit of 0.75 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Aluminum, total [as Al]
60% over limit
Discharged 1.2 mg/L against a permitted limit of 0.75 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Aluminum, total [as Al]
100% over limit
Discharged 1.5 mg/L against a permitted limit of 0.75 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
14% over limit
Discharged 40 mg/L against a permitted limit of 35 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Solids, total suspended
30% over limit
Discharged 45.5 mg/L against a permitted limit of 35 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Aluminum, total [as Al]
260% over limit
Discharged 2.7 mg/L against a permitted limit of 0.75 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Aluminum, total [as Al]
173% over limit
Discharged 2.05 mg/L against a permitted limit of 0.75 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Aluminum, total [as Al]
260% over limit
Discharged 2.7 mg/L against a permitted limit of 0.75 mg/L (INST MAX)
DMR, Limited - Numeric Violation
December 31, 2025
Aluminum, total [as Al]
419% over limit
Discharged 3.89 mg/L against a permitted limit of 0.75 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Iron, total [as Fe]
45% over limit
Discharged 4.34 mg/L against a permitted limit of 3 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Iron, total [as Fe]
137% over limit
Discharged 3.56 mg/L against a permitted limit of 1.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Aluminum, total [as Al]
471% over limit
Discharged 4.28 mg/L against a permitted limit of 0.75 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Iron, total [as Fe]
17% over limit
Discharged 4.34 mg/L against a permitted limit of 3.7 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Aluminum, total [as Al]
471% over limit
Discharged 4.28 mg/L against a permitted limit of 0.75 mg/L (INST MAX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)