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Sewerage Systems, Malvern, Pennsylvania. NPDES permit PA0050920, in force until Sep 30, 2027. Last 12 months: over a limit 13 times (last June 2026), 19 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | Chlorine, total residual, monthly average | .1 mg/L | ≤ .06 mg/L | 67% |
| November 2025 | Chlorine, total residual, monthly average | .07 mg/L | ≤ .06 mg/L | 17% |
| December 2025 | Solids, total dissolved, quarterly average | 1060 mg/L | ≤ 1000 mg/L | 6% |
| January 2026 | Coliform, fecal general, instantaneous maximum | 3200 #/100mL | ≤ 1000 #/100mL | 220% |
| February 2026 | Solids, total suspended, monthly average | 11 mg/L | ≤ 10 mg/L | 10% |
| March 2026 | Coliform, fecal general, instantaneous maximum | 2100 #/100mL | ≤ 1000 #/100mL | 110% |
| March 2026 | Solids, total suspended, monthly average | 12 mg/L | ≤ 10 mg/L | 20% |
| April 2026 | Phosphorus, total [as P], monthly average | 1.2 | ≤ .3 lb/d | 300% |
| April 2026 | Phosphorus, total [as P], monthly average | 6 mg/L | ≤ .5 mg/L | 1100% |
| May 2026 | Coliform, fecal general, instantaneous maximum | 3800 #/100mL | ≤ 1000 #/100mL | 280% |
| May 2026 | Coliform, fecal general, monthly average | 2240 #/100mL | ≤ 200 #/100mL | 1020% |
| June 2026 | Coliform, fecal general, instantaneous maximum | 8600 #/100mL | ≤ 1000 #/100mL | 760% |
| June 2026 | Coliform, fecal general, monthly average | 2740 #/100mL | ≤ 200 #/100mL | 1270% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 6 mg/L | all year |
| pH | instantaneous minimum | ≥ 6 SU | all year |
| pH | instantaneous maximum | ≤ 9 SU | all year |
| Solids, total suspended | monthly average | ≤ 10 mg/L | all year |
| Solids, total suspended | monthly average | ≤ 5.8 lb/d | all year |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.8 mg/L | May–Oct |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 5.4 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1 lb/d | May–Oct |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 3.1 lb/d | Jan, Feb, Mar, Apr, Nov, Dec |
| Phosphorus, total [as P] | monthly average | ≤ .5 mg/L | all year |
| Phosphorus, total [as P] | monthly average | ≤ .3 lb/d | all year |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| Chlorine, total residual | monthly average | ≤ .06 mg/L | all year |
| Chlorine, total residual | instantaneous maximum | ≤ .2 mg/L | all year |
| E. coli | instantaneous maximum | report only (#/100mL) | all year |
| Solids, total dissolved | quarterly average | ≤ 1000 mg/L | all year |
| Coliform, fecal general | monthly average | ≤ 200 #/100mL | May–Sep |
| Coliform, fecal general | monthly average | ≤ 200 #/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| Coliform, fecal general | instantaneous maximum | ≤ 1000 #/100mL | May–Sep |
| Coliform, fecal general | instantaneous maximum | ≤ 1000 #/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 10 mg/L | May–Oct |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 15 mg/L | Jan, Feb, Mar, Apr, Nov, Dec |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 5.8 lb/d | May–Oct |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 8.6 lb/d | Jan, Feb, Mar, Apr, Nov, Dec |
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/PA0050920 · MCP: https://passage-data.com/mcp