MAHNOMEN WWTP
Quick Summary
- •Currently out of compliance in at least one environmental program (CAA, CWA, or RCRA).
- •Assessed $0 in total penalties since records began.
- Address
-
104 W MADISON AVE, P.O. BOX 250
MAHNOMEN, MN 56557
View on map ↗ - County
- MAHNOMEN County
- Industry
- Utilities
- NAICS (North American Industry Classification)
- 221320
- Inspections
- 2 · last Sep 24, 2025
- Total Penalties
- $0
- Registry ID
- 110008796348
Compliance Status (Last 12 Quarters)
Number of calendar quarters, out of the last 12, in which this facility was in violation of its permit. Zero means no recorded violations in that program over the past three years.
Qtrs Non-Compliant
Compliance Violations
Individual permit violations recorded by the EPA across air, water, and hazardous waste programs. Open violations are unresolved as of the most recent ECHO data update.
| Program | Type | Violation Date | Return to Compliance | Status |
|---|---|---|---|---|
| cwa | Schedule Event unachieved and not reported | Jun 13, 2023 | Jul 14, 2023 | Resolved |
| cwa | Schedule Event unachieved and not reported | Jan 31, 2023 | Mar 3, 2023 | Resolved |
| cwa | Schedule Event unachieved and not reported | Jan 31, 2022 | Mar 3, 2022 | Resolved |
| cwa | Schedule Event unachieved and not reported | Jan 31, 2021 | Mar 3, 2021 | Resolved |
| cwa | Schedule Event unachieved and not reported | Jan 31, 2020 | Mar 2, 2020 | Resolved |
| cwa | Permit Violations - Failure to Submit Timely Permit Renewal Application | Aug 23, 2017 | Nov 29, 2018 | Resolved |
| cwa | Management Practice Violations - Improper Operation and Maintenance | Aug 23, 2017 | Nov 29, 2018 | Resolved |
| cwa | Effluent Violations - Unauthorized Discharge | Aug 23, 2017 | Nov 29, 2018 | Resolved |
| cwa | Permit Violations - Violation Specified in Comment | Feb 20, 1993 | — | Open |
Discharge Limit Exceedances
Instances where this facility's reported discharge monitoring results exceeded its permitted limits under the Clean Water Act. Exceedance percentage shows how far over the permit limit the discharge was.
| Pollutant | Violation | Reported | Limit | Exceedance | Period | Status |
|---|---|---|---|---|---|---|
| Mercury, total [as Hg] | DMR, Limited - Numeric Violation | 0.00 mg/L | 0.00 | +33% | Jun 2024 | Open |
| E. coli | DMR, Limited - Numeric Violation | 290.90 MPN/100mL | 235.00 | +24% | Jun 2022 | Open |
| E. coli | DMR, Limited - Numeric Violation | 166.75 MPN/100mL | 126.00 | +32% | Jun 2022 | Open |
| E. coli | DMR, Limited - Numeric Violation | 547.50 MPN/100mL | 235.00 | +133% | Oct 2019 | Open |
| E. coli | DMR, Limited - Numeric Violation | 446.00 MPN/100mL | 126.00 | +254% | Oct 2019 | Open |
| E. coli | DMR, Limited - Numeric Violation | 410.60 MPN/100mL | 235.00 | +75% | Jun 2019 | Open |
| E. coli | DMR, Limited - Numeric Violation | 240.70 MPN/100mL | 126.00 | +91% | Jun 2019 | Open |
| BOD, carb-5 day, 20 deg C, percent removal | DMR, Limited - Numeric Violation | 64.00 % | 85.00 | +140% | Jun 2019 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 132.40 kg/d | 98.00 | +35% | Apr 2019 | Open |
| E. coli | DMR, Limited - Numeric Violation | 866.40 MPN/100mL | 235.00 | +269% | May 2018 | Open |
| E. coli | DMR, Limited - Numeric Violation | 360.90 MPN/100mL | 235.00 | +54% | Jun 2015 | Open |
Enforcement Actions
Formal enforcement cases brought by the EPA or state agencies, including administrative orders and civil penalties assessed. Penalty amounts reflect what was formally assessed, not necessarily what was collected.