Non-Compliance
Clean Water Act
O' FALLON WASTEWATER TREATMENT PLANT
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
-
150 FIRMA ROAD
O'FALLON, MO 63366
View on map ↗ - County
- ST. CHARLES County
- Industry
- Utilities
- NAICS (North American Industry Classification)
- 22132
- Inspections
- 8 · last Dec 4, 2025
- Total Penalties
- $0
- Registry ID
- 110000572979
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.
5
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 | Permit Violations - Violation Specified in Comment | Dec 31, 2025 | — | Open |
| cwa | Pretreatment - Failure to Develop/Enforce Standards | Dec 31, 2025 | — | Open |
| cwa | Permit Violations - Violation Specified in Comment | Nov 27, 2024 | Jan 9, 2025 | Resolved |
| cwa | Pretreatment - Failure to Develop/Enforce Standards | Nov 27, 2024 | Jan 9, 2025 | Resolved |
| cwa | Pretreatment - Failure to Develop/Enforce Standards | Oct 14, 2021 | Jan 13, 2022 | Resolved |
| cwa | Pretreatment - Failure to Develop/Enforce Standards | Oct 10, 2019 | — | Open |
| cwa | Permit Violations - Violation Specified in Comment | Oct 10, 2019 | Dec 27, 2019 | Resolved |
| cwa | Permit Violations - Violation Specified in Comment | Jul 26, 2019 | Sep 17, 2019 | Resolved |
| cwa | Reporting Violations - Improper/ Incorrect Reporting | Jul 26, 2019 | Sep 17, 2019 | Resolved |
| cwa | Schedule Event reported late | Apr 1, 2019 | — | Open |
| cwa | Schedule Event unachieved and not reported | Apr 1, 2019 | Aug 15, 2019 | Resolved |
| cwa | Schedule Event achieved late but reported | Apr 1, 2019 | — | Open |
| cwa | Schedule Event unachieved but reported | Apr 1, 2019 | Aug 15, 2019 | Resolved |
| cwa | Schedule Event reported late | Jan 28, 2019 | — | Open |
| cwa | Schedule Event unachieved and not reported | Jan 28, 2019 | Mar 5, 2019 | Resolved |
| cwa | Schedule Event achieved late but reported | Jan 28, 2019 | — | Open |
| cwa | Schedule Event unachieved but reported | Jan 28, 2019 | Mar 5, 2019 | Resolved |
| cwa | Pretreatment - Failure to Develop/Enforce Standards | Jan 23, 2018 | — | Open |
| cwa | Schedule Event achieved late but reported | Apr 1, 2017 | — | Open |
| cwa | Schedule Event reported late | Apr 1, 2017 | — | Open |
| cwa | Schedule Event unachieved but reported | Mar 31, 2017 | May 12, 2017 | Resolved |
| cwa | Schedule Event reported late | Mar 31, 2017 | — | Open |
| cwa | Schedule Event achieved late but reported | Mar 31, 2017 | — | Open |
| cwa | Schedule Event unachieved and not reported | Mar 31, 2017 | May 12, 2017 | Resolved |
| cwa | Schedule Event unachieved and not reported | Oct 31, 2013 | Apr 8, 2014 | Resolved |
| cwa | Schedule Event achieved late but reported | Oct 31, 2013 | — | Open |
| cwa | Schedule Event reported late | Oct 31, 2013 | — | Open |
| cwa | Schedule Event unachieved but reported | Oct 31, 2013 | Apr 8, 2014 | Resolved |
| cwa | Schedule Event unachieved but reported | Apr 30, 2013 | Aug 21, 2013 | Resolved |
| cwa | Schedule Event achieved late but reported | Apr 30, 2013 | — | Open |
| cwa | Schedule Event reported late | Apr 30, 2013 | — | Open |
| cwa | Schedule Event unachieved and not reported | Apr 30, 2013 | Aug 21, 2013 | Resolved |
| cwa | Schedule Event achieved late but reported | Jan 28, 2013 | — | Open |
| cwa | Schedule Event unachieved and not reported | Oct 31, 2012 | Aug 21, 2013 | Resolved |
| cwa | Schedule Event reported late | Oct 31, 2012 | — | Open |
| cwa | Schedule Event unachieved but reported | Oct 31, 2012 | Aug 21, 2013 | Resolved |
| cwa | Schedule Event achieved late but reported | Oct 31, 2012 | — | Open |
| cwa | Schedule Event achieved late but reported | Apr 30, 2012 | — | Open |
| cwa | Schedule Event unachieved and not reported | Apr 30, 2012 | Aug 21, 2013 | Resolved |
| cwa | Schedule Event unachieved but reported | Apr 30, 2012 | Aug 21, 2013 | Resolved |
| cwa | Schedule Event reported late | Apr 30, 2012 | — | Open |
| cwa | Schedule Event achieved late but reported | Jan 28, 2012 | — | Open |
| cwa | Schedule Event reported late | Oct 31, 2011 | — | Open |
| cwa | Schedule Event achieved late but reported | Oct 31, 2011 | — | Open |
| cwa | Schedule Event reported late | Apr 30, 2011 | — | Open |
| cwa | Schedule Event achieved late but reported | Apr 30, 2011 | — | Open |
| cwa | Schedule Event unachieved but reported | Apr 30, 2011 | Dec 5, 2011 | Resolved |
| cwa | Schedule Event unachieved and not reported | Apr 30, 2011 | Dec 5, 2011 | Resolved |
| cwa | Schedule Event achieved late but reported | Jan 28, 2011 | — | Open |
| cwa | Schedule Event reported late | Jan 28, 2011 | — | 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 |
|---|---|---|---|---|---|---|
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | DMR, Limited - Numeric Violation | 3.50 toxic | 1.50 | +133% | Dec 2022 | Open |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | DMR, Limited - Numeric Violation | 3.60 toxic | 1.50 | +140% | Dec 2021 | Open |
| E. coli | DMR, Limited - Numeric Violation | 131.33 MPN/100mL | 126.00 | +4% | Apr 2021 | Open |
| E. coli | DMR, Limited - Numeric Violation | 215.37 MPN/100mL | 126.00 | +71% | Sep 2020 | Open |
| E. coli | DMR, Limited - Numeric Violation | 2,419.60 MPN/100mL | 630.00 | +284% | Aug 2020 | Open |
| E. coli | DMR, Limited - Numeric Violation | 211.72 MPN/100mL | 126.00 | +68% | Aug 2020 | Open |
| E. coli, colony forming units [CFU] | DMR, Limited - Numeric Violation | 440.29 MPN/100mL | 126.00 | +249% | Jul 2020 | Open |
| E. coli, colony forming units [CFU] | DMR, Limited - Numeric Violation | 2,047.13 MPN/100mL | 630.00 | +225% | Jul 2020 | Open |
| E. coli, colony forming units [CFU] | DMR, Limited - Numeric Violation | 177.54 MPN/100mL | 126.00 | +41% | Jun 2020 | Open |
| E. coli, colony forming units [CFU] | DMR, Limited - Numeric Violation | 2,419.60 MPN/100mL | 630.00 | +284% | Jun 2020 | Open |
| E. coli, colony forming units [CFU] | DMR, Limited - Numeric Violation | 2,419.60 MPN/100mL | 630.00 | +284% | Apr 2020 | Open |
| E. coli, colony forming units [CFU] | DMR, Limited - Numeric Violation | 664.08 MPN/100mL | 126.00 | +427% | Apr 2020 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 24.00 mg/L | 23.80 | +1% | Oct 2019 | Open |
| E. coli, colony forming units [CFU] | DMR, Limited - Numeric Violation | 189.60 MPN/100mL | 126.00 | +50% | Sep 2019 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 44.00 mg/L | 23.80 | +85% | May 2019 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 26.00 mg/L | 23.80 | +9% | Dec 2018 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 28.00 mg/L | 23.80 | +18% | Sep 2018 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 24.00 mg/L | 23.80 | +1% | Jul 2018 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 24.00 mg/L | 23.80 | +1% | Dec 2017 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 28.00 mg/L | 23.80 | +18% | Nov 2017 | Open |
| Nitrogen, ammonia total [as N] | DMR, Limited - Numeric Violation | 27.00 mg/L | 23.80 | +13% | Sep 2017 | Open |
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