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Sewerage Systems, Elverson, Pennsylvania. NPDES permit PA0031631 expired Jan 31, 2025; its limits still apply. Last 12 months: over a limit 15 times (last June 2026), 18 required values missing, 2 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | Chlorine, total residual, monthly average | .6 mg/L | ≤ .5 mg/L | 20% |
| November 2025 | Chlorine, total residual, monthly average | .6 mg/L | ≤ .5 mg/L | 20% |
| December 2025 | Chlorine, total residual, instantaneous maximum | 1.65 mg/L | ≤ 1.6 mg/L | 3% |
| December 2025 | Chlorine, total residual, monthly average | .7 mg/L | ≤ .5 mg/L | 40% |
| January 2026 | Solids, total suspended, monthly average | 33 mg/L | ≤ 30 mg/L | 10% |
| February 2026 | Phosphorus, total [as P], instantaneous maximum | 4.61 mg/L | ≤ 4 mg/L | 15% |
| February 2026 | Phosphorus, total [as P], monthly average | 2.9 mg/L | ≤ 2 mg/L | 45% |
| February 2026 | Solids, total suspended, instantaneous maximum | 1900 mg/L | ≤ 60 mg/L | 3067% |
| February 2026 | Solids, total suspended, monthly average | 965 mg/L | ≤ 30 mg/L | 3117% |
| April 2026 | Solids, total suspended, monthly average | 40 mg/L | ≤ 30 mg/L | 33% |
| May 2026 | Chlorine, total residual, monthly average | .6 mg/L | ≤ .5 mg/L | 20% |
| May 2026 | Nitrogen, ammonia total [as N], instantaneous maximum | 55.2 mg/L | ≤ 28 mg/L | 97% |
| May 2026 | Nitrogen, ammonia total [as N], monthly average | 44 mg/L | ≤ 14 mg/L | 214% |
| June 2026 | Nitrogen, ammonia total [as N], instantaneous maximum | 40.3 mg/L | ≤ 28 mg/L | 44% |
| June 2026 | Nitrogen, ammonia total [as N], monthly average | 22 mg/L | ≤ 14 mg/L | 57% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Oxygen, dissolved [DO] | daily minimum | ≥ 5 mg/L | all year |
| pH | daily minimum | ≥ 6 SU | all year |
| pH | instantaneous maximum | ≤ 9 SU | all year |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year |
| Solids, total suspended | instantaneous maximum | ≤ 60 mg/L | all year |
| Nitrogen, total [as N] | annual average | report only (mg/L) | all year |
| Nitrogen, total [as N] | annual average | report only (lb/d) | all year |
| Nitrogen, total [as N] | annual total | report only (lb/d) | all year |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 14 mg/L | May–Oct |
| Nitrogen, ammonia total [as N] | instantaneous maximum | ≤ 28 mg/L | May–Oct |
| Phosphorus, total [as P] | monthly average | ≤ 2 mg/L | all year |
| Phosphorus, total [as P] | instantaneous maximum | ≤ 4 mg/L | all year |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year |
| Phosphorus, total [as P] | annual total | ≤ 164.48 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 | ≤ .5 mg/L | all year |
| Chlorine, total residual | instantaneous maximum | ≤ 1.6 mg/L | all year |
| Coliform, fecal general | geometric mean | ≤ 200 #/100mL | May–Sep |
| Coliform, fecal general | geometric mean | ≤ 2000 #/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| Coliform, fecal general | instantaneous maximum | ≤ 1000 #/100mL | May–Sep |
| Coliform, fecal general | instantaneous maximum | ≤ 10000 #/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 25 mg/L | all year |
| BOD, carbonaceous [5 day, 20 C] | instantaneous maximum | ≤ 50 mg/L | all year |
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/PA0031631 · MCP: https://passage-data.com/mcp