MINNESOTA POWER - BOSWELL ENERGY CENTER
NPDES ID: MN0001007
D — SNC: Discharge monitoring report not received
The facility didn't submit its required discharge monitoring report.
This quarter: 1 effluent violation, 5 reporting violations.
Violations
June 30, 2026
Chlorine, total residual
2532% over limit
Discharged 1 mg/L against a permitted limit of 0.038 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2026
Chlorine, total residual
189% over limit
Discharged 0.11 mg/L against a permitted limit of 0.038 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
2044% over limit
Discharged 9.07000043 mg/L against a permitted limit of 0.42300002 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
556% over limit
Discharged 2.0930001 mg/L against a permitted limit of 0.31900002 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Chlorination
0% over limit
Discharged 0 d/mo against a permitted limit of 1.57799995 d/mo (CUM TOTL)
DMR, Limited - Overdue
Cycles Of Concentration
0% over limit
Discharged 0 c against a permitted limit of 0 c (DAILY AV)
DMR, Monitor Only - Overdue
First flagged
April 14, 2026 (5 months ago)
Last confirmed
September 15, 2026 (4 days ago)