Non-Compliance
Clean Water Act
ST CHARLES COUNTY REGIONAL AIRPORT
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
-
6490 GRAFTON FERRY ROAD
PORTAGE DES SIOUX, MO 63373
View on map ↗ - County
- ST. CHARLES County
- Inspections
- 1 · last Jul 22, 2025
- Total Penalties
- $0
- Registry ID
- 110006666232
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.
1
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 | Effluent Violations - Unauthorized Discharge | Aug 5, 2025 | Aug 5, 2025 | Resolved |
| cwa | Schedule Event achieved late but reported | Oct 31, 2014 | — | Open |
| cwa | Schedule Event unachieved but reported | Oct 31, 2014 | Dec 5, 2014 | Resolved |
| cwa | Schedule Event unachieved and not reported | Oct 31, 2014 | Dec 5, 2014 | Resolved |
| cwa | Schedule Event reported late | Oct 31, 2014 | — | 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 |
|---|---|---|---|---|---|---|
| Ethylbenzene | DMR, Limited - Numeric Violation | 1.00 mg/L | 0.32 | +212% | Mar 2020 | Open |
| Ethylbenzene | DMR, Limited - Overdue | 1.00 mg/L | 0.32 | +212% | Mar 2020 | Resolved |
| Ethylbenzene | DMR, Limited - Numeric Violation | 1.00 mg/L | 0.32 | +212% | Mar 2020 | Open |
| Ethylbenzene | DMR, Limited - Overdue | 1.00 mg/L | 0.32 | +212% | Mar 2020 | Resolved |
| Solids, total suspended | DMR, Limited - Numeric Violation | 89.00 mg/L | 70.00 | +27% | Feb 2020 | Open |
| Oxygen demand, chem. [high level] [COD] | DMR, Limited - Numeric Violation | 95.60 mg/L | 90.00 | +6% | Feb 2020 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 89.00 mg/L | 70.00 | +27% | Feb 2020 | Open |
| Ethylbenzene | DMR, Limited - Numeric Violation | 1.00 mg/L | 0.32 | +213% | Mar 2018 | Open |
| Ethylbenzene | DMR, Limited - Numeric Violation | 1.00 mg/L | 0.32 | +213% | Mar 2018 | Open |
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