Non-Compliance
Clean Water Act
THORNBURY TOWNSHIP 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
-
490 THORNTON RD
CHEYNEY, PA 19319
View on map ↗ - County
- DELAWARE County
- Inspections
- 5 · last Nov 12, 2025
- Total Penalties
- $0 · last Apr 24, 2017
- Registry ID
- 110009162244
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.
4
Water (CWA)
Qtrs Non-Compliant
Qtrs Non-Compliant
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 |
|---|---|---|---|---|---|---|
| Chlorine, total residual | DMR, Limited - Numeric Violation | 2.20 mg/L | 1.20 | +83% | Jan 2026 | Open |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 3.20 mg/L | 1.20 | +167% | Sep 2025 | Open |
| BOD, carbonaceous [5 day, 20 C] | DMR, Limited - Numeric Violation | 53.10 mg/L | 40.00 | +33% | Jan 2024 | Open |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 2.20 mg/L | 1.20 | +83% | Feb 2022 | Open |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 1.59 mg/L | 1.20 | +33% | Jan 2022 | Open |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 1.40 mg/L | 1.20 | +17% | Aug 2020 | Open |
| Coliform, fecal general | DMR, Limited - Numeric Violation | 2,420.00 MPN/100mL | 1,000.00 | +142% | Jun 2019 | Open |
| Phosphorus, total [as P] | DMR, Limited - Numeric Violation | 2.50 mg/L | 2.00 | +25% | Jan 2019 | Open |
| Phosphorus, total [as P] | DMR, Limited - Numeric Violation | 2.40 mg/L | 2.00 | +20% | Sep 2018 | Open |
| Coliform, fecal general | DMR, Limited - Numeric Violation | 209.00 MPN/100mL | 200.00 | +5% | Mar 2018 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 53.12 kg/d | 30.87 | +72% | Feb 2018 | Open |
| Solids, total suspended | DMR, Limited - Numeric Violation | 86.00 mg/L | 45.00 | +91% | Feb 2018 | Open |
| Chlorine, total residual | DMR, Limited - Numeric Violation | 1.27 mg/L | 1.20 | +6% | Dec 2016 | Resolved |
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 Penalty AO
Clean Water Act
· Case PA-0053473_04242017 · Apr 24, 2017
$4,254
State CWA Penalty AO
Clean Water Act
· Case PA-0053473_07012015 · Jul 1, 2015
$1,344
State CWA Penalty AO
Clean Water Act
· Case PA-0053473_04012009 · Apr 1, 2009
$2,400
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