Non-Compliance
Clean Water Act
LAKE MILLS SEWAGE TREATMENT PLANT (STP)
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
-
893-575 US-69
LAKE MILLS, IA 50450
View on map ↗ - County
- WINNEBAGO County
- Industry
- Utilities
- NAICS (North American Industry Classification)
- 221320
- Inspections
- 1 · last Mar 17, 2023
- Total Penalties
- $0
- Registry ID
- 110010035700
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.
11
Water (CWA)
Qtrs Non-Compliant
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 reported late | Dec 1, 2024 | — | Open |
| cwa | Schedule Event unachieved but reported | Dec 1, 2024 | Apr 17, 2025 | Resolved |
| cwa | Schedule Event unachieved and not reported | Dec 1, 2024 | Apr 17, 2025 | Resolved |
| cwa | Schedule Event reported late | Dec 1, 2024 | — | Open |
| cwa | Schedule Event unachieved and not reported | Dec 1, 2024 | Apr 17, 2025 | Resolved |
| cwa | Schedule Event achieved late but reported | Dec 1, 2024 | — | Open |
| cwa | Schedule Event achieved late but reported | Dec 1, 2024 | — | Open |
| cwa | Schedule Event unachieved but reported | Dec 1, 2024 | Apr 17, 2025 | Resolved |
| cwa | Schedule Event reported late | Mar 1, 2023 | — | Open |
| cwa | Schedule Event achieved late but reported | Mar 1, 2023 | — | Open |
| cwa | Schedule Event unachieved but reported | Sep 1, 2022 | Dec 12, 2022 | Resolved |
| cwa | Schedule Event unachieved and not reported | Sep 1, 2022 | Jan 4, 2023 | Resolved |
| cwa | Schedule Event reported late | Sep 1, 2022 | — | Open |
| cwa | Schedule Event achieved late but reported | Sep 1, 2022 | — | Open |
| cwa | Schedule Event reported late | Nov 1, 2021 | — | Open |
| cwa | Schedule Event achieved late but reported | Nov 1, 2021 | — | Open |
| cwa | Schedule Event achieved late but reported | Mar 1, 2019 | — | Open |
| cwa | Schedule Event achieved late but reported | Jun 1, 2018 | — | Open |
| cwa | Schedule Event reported late | Jun 1, 2018 | — | Open |
| cwa | Schedule Event reported late | Mar 1, 2018 | — | Open |
| cwa | Schedule Event achieved late but reported | Mar 1, 2018 | — | Open |
| cwa | Schedule Event achieved late but reported | Jun 1, 2017 | — | Open |
| cwa | Schedule Event reported late | Jun 1, 2017 | — | 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 |
|---|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 5.40 mg/L | 3.40 | +59% | Jan 2026 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 3.90 mg/L | 5.00 | +22% | Jan 2026 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 3.06 mg/L | 2.50 | +23% | Dec 2025 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 3.38 mg/L | 2.70 | +25% | Nov 2025 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 2.43 mg/L | 2.30 | +6% | Nov 2025 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 3.60 mg/L | 5.00 | +28% | Sep 2025 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 2.94 mg/L | 2.70 | +9% | Sep 2025 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 3.20 mg/L | 5.00 | +36% | Aug 2025 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 3.40 mg/L | 5.00 | +32% | Jul 2025 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 2.06 mg/L | 1.30 | +59% | Jun 2025 | Resolved |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 4.40 mg/L | 5.00 | +12% | Jun 2025 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 3.87 mg/L | 3.20 | +21% | Jun 2025 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 9.35 kg/d | 9.08 | +3% | May 2025 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 6.45 mg/L | 3.20 | +102% | May 2025 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 3.50 mg/L | 5.00 | +30% | May 2025 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 3.47 mg/L | 1.70 | +104% | May 2025 | Resolved |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 5.58 mg/L | 4.70 | +19% | Apr 2025 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 4.35 kg/d | 4.31 | +1% | Apr 2025 | Resolved |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 3.66 mg/L | 1.50 | +144% | Apr 2025 | Resolved |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 7.46 mg/L | 3.90 | +91% | Mar 2025 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 6.57 mg/L | 3.40 | +93% | Mar 2025 | Resolved |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 4.59 mg/L | 4.00 | +15% | Feb 2025 | Resolved |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 5.46 mg/L | 3.90 | +40% | Dec 2024 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 4.50 mg/L | 5.00 | +10% | Aug 2024 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 3.43 mg/L | 3.20 | +7% | Jun 2024 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 1.47 mg/L | 1.30 | +13% | Jun 2024 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 1.82 mg/L | 1.70 | +7% | May 2024 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 2.50 mg/L | 5.00 | +50% | May 2024 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 3.76 mg/L | 3.20 | +17% | May 2024 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 44.00 mg/L | 40.00 | +10% | Apr 2024 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 25.38 mg/L | 25.00 | +2% | Mar 2024 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 3.41 mg/L | 2.50 | +36% | Dec 2023 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 12.50 mg/L | 11.00 | +14% | Aug 2023 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 18.00 mg/L | 16.00 | +13% | Aug 2023 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 3.11 mg/L | 5.00 | +38% | Jun 2023 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 4.20 mg/L | 5.00 | +16% | May 2023 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 2.90 mg/L | 5.00 | +42% | Jan 2022 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 4.00 mg/L | 5.00 | +20% | Aug 2021 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 4.30 mg/L | 5.00 | +14% | Jul 2021 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 20.00 mg/L | 16.00 | +25% | Aug 2018 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 4.30 mg/L | 5.00 | +14% | Jun 2018 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 4.90 mg/L | 5.00 | +2% | May 2018 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 89.15 kg/d | 85.35 | +4% | May 2018 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 11.63 mg/L | 9.10 | +28% | Apr 2018 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 31.00 mg/L | 30.00 | +3% | Nov 2017 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 19.00 mg/L | 16.00 | +19% | Aug 2017 | Open |
| Oxygen, dissolved [DO] | DMR, Limited - Numeric Violation | 4.00 mg/L | 5.00 | +20% | Jun 2017 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 0.77 MGD | 0.75 | +3% | Sep 2016 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 1.67 MGD | 1.00 | +67% | Sep 2016 | Open |
| Flow, in conduit or thru treatment plant | DMR, Limited - Numeric Violation | 1.64 MGD | 1.00 | +64% | Aug 2016 | Open |
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· Utilities