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Sewerage Systems, Malvern, Pennsylvania. NPDES permit PA0056731, in force until Mar 31, 2028. Last 12 months: over a limit 2 times (last February 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit |
|---|---|---|---|
| February 2026 | Coliform, fecal general, geometric mean | > 141 #/100mL | ≤ 200 #/100mL |
| February 2026 | Coliform, fecal general, instantaneous maximum | > 20000 #/100mL | ≤ 1000 #/100mL |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 6 mg/L | all year | 001 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 001 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 10 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.5 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 4.5 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Phosphorus, total [as P] | monthly average | ≤ 1 mg/L | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Coliform, fecal general | geometric mean | ≤ 200 #/100mL | all year | 001 |
| Coliform, fecal general | instantaneous maximum | report only (#/100mL) | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 10 mg/L | all year | 001 |
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 6 mg/L | all year | 101 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 101 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 101 |
| Solids, total suspended | monthly average | ≤ 20 mg/L | all year | 101 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2 mg/L | May–Oct | 101 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 4.5 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 101 |
| Phosphorus, total [as P] | monthly average | ≤ 2 mg/L | all year | 101 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 101 |
| Coliform, fecal general | geometric mean | ≤ 200 #/100mL | May–Sep | 101 |
| Coliform, fecal general | geometric mean | ≤ 200 #/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 101 |
| Coliform, fecal general | instantaneous maximum | ≤ 1000 #/100mL | May–Sep | 101 |
| Coliform, fecal general | instantaneous maximum | ≤ 1000 #/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 101 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 15 mg/L | all year | 101 |
Cited limits by parameter: Pennsylvania's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/PA0056731 · MCP: https://passage-data.com/mcp