GUARDIAN ENERGY HANKINSON
NPDES ID: ND0026310
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
Chlorine, total residual
82% over limit
Discharged 0.02 mg/L against a permitted limit of 0.011 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
111% over limit
Discharged 0.04 mg/L against a permitted limit of 0.019 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2025
Chlorine, total residual
80% over limit
Discharged 0.019833 mg/L against a permitted limit of 0.011 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
111% over limit
Discharged 0.04 mg/L against a permitted limit of 0.019 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2025
Chlorine, total residual
111% over limit
Discharged 0.04 mg/L against a permitted limit of 0.019 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chlorine, total residual
27% over limit
Discharged 0.014 mg/L against a permitted limit of 0.011 mg/L (MO AVG)
DMR, Limited - Numeric Violation
June 30, 2025
Solids, total suspended
103% over limit
Discharged 61 mg/L against a permitted limit of 30 mg/L (MX30DAAV)
DMR, Limited - Numeric Violation
Solids, total suspended
36% over limit
Discharged 61 mg/L against a permitted limit of 45 mg/L (MX 7D AV)
DMR, Limited - Numeric Violation
Chlorine, total residual
111% over limit
Discharged 0.04 mg/L against a permitted limit of 0.019 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chlorine, total residual
86% over limit
Discharged 0.0205 mg/L against a permitted limit of 0.011 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Chlorine, total residual
27% over limit
Discharged 0.014 mg/L against a permitted limit of 0.011 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Toxic Units Static Renewal 48Hr Acute Ceriodaphnia dubia
0% over limit
Discharged 0 toxic against a permitted limit of 1 toxic (MAXIMUM)
DMR, Limited - Overdue
Chlorine, total residual
163% over limit
Discharged 0.05 mg/L against a permitted limit of 0.019 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
TU Static Renewal 96Hr Acute Pimphales promelas
0% over limit
Discharged 0 toxic against a permitted limit of 1 toxic (MAXIMUM)
DMR, Limited - Overdue
September 30, 2024
Chlorine, total residual
163% over limit
Discharged 0.05 mg/L against a permitted limit of 0.019 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chlorine, total residual
200% over limit
Discharged 0.033 mg/L against a permitted limit of 0.011 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)