Non-Compliance
Clean Water Act
AMBOY 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
-
600 EAST MAINE ST
AMBOY, MN 56010
View on map ↗ - County
- BLUE EARTH County
- Inspections
- 2 · last May 21, 2025
- Total Penalties
- $0
- Registry ID
- 110006739226
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.
9
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 unachieved and not reported | Dec 31, 2021 | Nov 10, 2022 | Resolved |
| cwa | Schedule Event unachieved but reported | Dec 31, 2021 | Dec 5, 2022 | Resolved |
| cwa | Schedule Event unachieved and not reported | Dec 31, 2021 | Dec 5, 2022 | Resolved |
| cwa | Schedule Event reported late | Dec 31, 2021 | — | Open |
| cwa | Schedule Event unachieved but reported | Dec 31, 2021 | Nov 10, 2022 | Resolved |
| cwa | Schedule Event achieved late but reported | Dec 31, 2021 | — | Open |
| cwa | Schedule Event reported late | Dec 31, 2021 | — | Open |
| cwa | Schedule Event achieved late but reported | Dec 31, 2021 | — | Open |
| cwa | Schedule Event achieved late but reported | Jan 16, 2021 | — | Open |
| cwa | Schedule Event reported late | Jan 16, 2021 | — | Open |
| cwa | Schedule Event unachieved and not reported | Jan 16, 2021 | Feb 26, 2021 | Resolved |
| cwa | Schedule Event unachieved but reported | Jan 16, 2021 | Feb 26, 2021 | Resolved |
| cwa | Schedule Event achieved late but reported | Dec 31, 2020 | — | Open |
| cwa | Schedule Event reported late | Dec 31, 2020 | — | Open |
| cwa | Schedule Event unachieved and not reported | Dec 31, 2020 | Feb 26, 2021 | Resolved |
| cwa | Schedule Event unachieved but reported | Dec 31, 2020 | Feb 26, 2021 | Resolved |
| cwa | Schedule Event achieved late but reported | Jan 1, 1991 | — | Open |
| cwa | Schedule Event achieved late but reported | Oct 1, 1990 | — | Open |
| cwa | Schedule Event achieved late but reported | Jul 1, 1990 | — | Open |
| cwa | Schedule Event achieved late but reported | Apr 1, 1990 | — | Open |
| cwa | Schedule Event achieved late but reported | Jan 1, 1990 | — | Open |
| cwa | Schedule Event reported late | Oct 1, 1989 | — | Open |
| cwa | Schedule Event achieved late but reported | Oct 1, 1989 | — | Open |
| cwa | Schedule Event achieved late but reported | Jul 1, 1989 | — | Open |
| cwa | Schedule Event achieved late but reported | Apr 1, 1989 | — | Open |
| cwa | Schedule Event achieved late but reported | Jan 1, 1989 | — | Open |
| cwa | Schedule Event achieved late but reported | Oct 1, 1988 | — | 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 |
|---|---|---|---|---|---|---|
| Solids, suspended percent removal | DMR, Limited - Numeric Violation | 84.00 % | 85.00 | +7% | Nov 2025 | Open |
| Solids, suspended percent removal | DMR, Limited - Numeric Violation | 69.00 % | 85.00 | +107% | Sep 2025 | Open |
| BOD, carb-5 day, 20 deg C, percent removal | DMR, Limited - Numeric Violation | 82.00 % | 85.00 | +20% | Aug 2025 | Open |
| Solids, suspended percent removal | DMR, Limited - Numeric Violation | 79.00 % | 85.00 | +40% | Aug 2025 | Open |
| Solids, suspended percent removal | DMR, Limited - Numeric Violation | 82.00 % | 85.00 | +20% | Jul 2025 | Open |
| Coliform, fecal MPN + membrane ftl 44.5 C | DMR, Limited - Numeric Violation | 357.00 MPN/100mL | 200.00 | +79% | Jul 2025 | Open |
| BOD, carb-5 day, 20 deg C, percent removal | DMR, Limited - Numeric Violation | 84.00 % | 85.00 | +7% | Jul 2025 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 49.00 mg/L | 25.00 | +96% | Jun 2025 | Open |
| BOD, carb-5 day, 20 deg C, percent removal | DMR, Limited - Numeric Violation | 73.00 % | 85.00 | +80% | Jun 2025 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 38.10 kg/d | 27.10 | +41% | Jun 2025 | Open |
| Phosphorus, total [as P] | DMR, Limited - Numeric Violation | 3.30 kg/d | 1.40 | +136% | Jun 2025 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 33.00 kg/d | 32.60 | +1% | Jun 2025 | Open |
| Solids, suspended percent removal | DMR, Limited - Numeric Violation | 80.00 % | 85.00 | +33% | Jun 2025 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 110.40 kg/d | 48.80 | +126% | Jun 2025 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 20.00 mg/L | 15.00 | +33% | Jun 2025 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 32.00 mg/L | 30.00 | +7% | May 2025 | Open |
| Solids, suspended percent removal | DMR, Limited - Numeric Violation | 54.00 % | 85.00 | +207% | May 2025 | Open |
| BOD, carb-5 day, 20 deg C, percent removal | DMR, Limited - Numeric Violation | 73.00 % | 85.00 | +80% | May 2025 | Open |
| BOD, carb-5 day, 20 deg C, percent removal | DMR, Limited - Numeric Violation | 72.00 % | 85.00 | +87% | Apr 2025 | Open |
| Solids, suspended percent removal | DMR, Limited - Numeric Violation | 42.00 % | 85.00 | +287% | Apr 2025 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 18.00 mg/L | 15.00 | +20% | Mar 2025 | Open |
| BOD, carb-5 day, 20 deg C, percent removal | DMR, Limited - Numeric Violation | 76.00 % | 85.00 | +60% | Mar 2025 | Open |
| Solids, suspended percent removal | DMR, Limited - Numeric Violation | 83.00 % | 85.00 | +13% | Mar 2025 | Open |
| Solids, suspended percent removal | DMR, Limited - Numeric Violation | 78.00 % | 85.00 | +47% | Feb 2025 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 27.00 mg/L | 25.00 | +8% | Feb 2025 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 35.00 mg/L | 30.00 | +17% | Feb 2025 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 22.00 mg/L | 15.00 | +47% | Feb 2025 | Open |
| BOD, carb-5 day, 20 deg C, percent removal | DMR, Limited - Numeric Violation | 84.00 % | 85.00 | +7% | Feb 2025 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 56.00 mg/L | 45.00 | +24% | Feb 2025 | Open |
| BOD, carb-5 day, 20 deg C, percent removal | DMR, Limited - Numeric Violation | 80.00 % | 85.00 | +33% | Jul 2024 | Open |
| Solids, suspended percent removal | DMR, Limited - Numeric Violation | 75.00 % | 85.00 | +67% | Jul 2024 | Open |
| BOD, carb-5 day, 20 deg C, percent removal | DMR, Limited - Numeric Violation | 80.00 % | 85.00 | +33% | Jun 2024 | Open |
| Solids, suspended percent removal | DMR, Limited - Numeric Violation | 79.00 % | 85.00 | +40% | Jun 2024 | Open |
| Solids, suspended percent removal | DMR, Limited - Numeric Violation | 75.00 % | 85.00 | +67% | May 2024 | Open |
| Coliform, fecal MPN + membrane ftl 44.5 C | DMR, Limited - Numeric Violation | 297.00 MPN/100mL | 200.00 | +49% | May 2024 | Open |
| Solids, suspended percent removal | DMR, Limited - Numeric Violation | 84.00 % | 85.00 | +7% | Apr 2024 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 52.00 mg/L | 45.00 | +16% | Jan 2024 | Open |
| BOD, carb-5 day, 20 deg C, percent removal | DMR, Limited - Numeric Violation | 82.00 % | 85.00 | +20% | May 2023 | Open |
| Solids, suspended percent removal | DMR, Limited - Numeric Violation | 78.00 % | 85.00 | +47% | May 2023 | Open |
| BOD, carb-5 day, 20 deg C, percent removal | DMR, Limited - Numeric Violation | 53.00 % | 85.00 | +213% | Apr 2023 | Open |
| Solids, suspended percent removal | DMR, Limited - Numeric Violation | 81.00 % | 85.00 | +27% | Apr 2023 | Open |
| Solids, suspended percent removal | DMR, Limited - Numeric Violation | 83.00 % | 85.00 | +13% | Mar 2022 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 48.00 mg/L | 45.00 | +7% | Feb 2022 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 33.00 mg/L | 30.00 | +10% | Feb 2022 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 16.00 mg/L | 15.00 | +7% | Feb 2022 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 39.00 mg/L | 25.00 | +56% | Dec 2021 | Open |
| BOD, carb-5 day, 20 deg C, percent removal | DMR, Limited - Numeric Violation | 78.00 % | 85.00 | +47% | Mar 2021 | Open |
| Solids, suspended percent removal | DMR, Limited - Numeric Violation | 83.00 % | 85.00 | +13% | Feb 2021 | 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.
State CWA Non Penalty AO
Clean Water Act
· Case MN-NOV12062022 · Dec 6, 2022
Civil Judicial Action
Clean Water Act
· Case MN-N00000320 · Jul 13, 1988
State CWA Non Penalty AO
Clean Water Act
· Case MN-N00000006 · Sep 30, 1987
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