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Sewage treatment plant, major discharger, Willow Grove, Pennsylvania. NPDES permit PA0025976, in force until Oct 31, 2030. Last 12 months: over a limit 10 times (last May 2026), 52 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| December 2025 | Coliform, fecal general, instantaneous maximum | 2300 #/100mL | ≤ 1000 #/100mL | 130% |
| February 2026 | Cyanide, free available, daily maximum | .024 mg/L | ≤ .0079 mg/L | 204% |
| February 2026 | Cyanide, free available, daily maximum | .899 | ≤ .47 lb/d | 91% |
| February 2026 | Cyanide, free available, monthly average | .024 mg/L | ≤ .0051 mg/L | 371% |
| February 2026 | Cyanide, free available, monthly average | .899 | ≤ .3 lb/d | 200% |
| May 2026 | Chlorine, total residual, monthly average | .06 mg/L | ≤ .048 mg/L | 25% |
| May 2026 | Cyanide, free available, daily maximum | .014 mg/L | ≤ .0079 mg/L | 77% |
| May 2026 | Cyanide, free available, daily maximum | .559 | ≤ .47 lb/d | 19% |
| May 2026 | Cyanide, free available, monthly average | .014 mg/L | ≤ .0051 mg/L | 175% |
| May 2026 | Cyanide, free available, monthly average | .559 | ≤ .3 lb/d | 86% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 6 mg/L | all year | 001 |
| Oxygen, dissolved [DO] | monthly average | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | report only (lb/d) | all year | 001 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 001 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 1799 lb/d | all year | 001 |
| Solids, total suspended | weekly average | ≤ 2698 lb/d | all year | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 001 |
| Solids, total suspended | monthly average | report only (lb/d) | all year | 001 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.4 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 4.2 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 84 lb/d | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 252 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (lb/d) | all year | 001 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrite + Nitrate total [as N] | monthly average | report only (lb/d) | all year | 001 |
| Phosphorus, total [as P] | monthly average | ≤ 2 mg/L | all year | 001 |
| Phosphorus, total [as P] | monthly average | ≤ 120 lb/d | all year | 001 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year | 001 |
| Copper, total [as Cu] | monthly average | ≤ .03 mg/L | all year | 001 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 001 |
| Antimony, total [as Sb] | daily maximum | report only (mg/L) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Chlorine, total residual | monthly average | ≤ .048 mg/L | all year | 001 |
| Chlorine, total residual | instantaneous maximum | ≤ .155 mg/L | all year | 001 |
| E. coli | instantaneous maximum | report only (#/100mL) | all year | 001 |
| Ultraviolet light transmittance | instantaneous minimum | report only (%) | all year | 001 |
| Cyanide, free available | monthly average | ≤ .0051 mg/L | all year | 001 |
| Cyanide, free available | daily maximum | ≤ .0079 mg/L | all year | 001 |
| Cyanide, free available | monthly average | ≤ .3 lb/d | all year | 001 |
| Cyanide, free available | daily maximum | ≤ .47 lb/d | all year | 001 |
| Perfluorooctanoic acid (PFOA) | instantaneous maximum | report only (ug/L) | all year | 001 |
| Perfluorooctanesulfonate | instantaneous maximum | report only (ug/L) | all year | 001 |
| Perfluorobutanesulfonic acid (PFBS) | instantaneous maximum | report only (ug/L) | all year | 001 |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) | instantaneous maximum | report only (ug/L) | all year | 001 |
| Toxicity [chronic], Ceriodaphnia dubia | daily maximum | ≤ 1.3 tox chronic | all year | 001 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | daily maximum | report only (tox chronic) | all year | 001 |
| Solids, total dissolved | quarterly average | ≤ 1000 mg/L | all year | 001 |
| Solids, total dissolved | quarterly average | report only (lb/d) | all year | 001 |
| Coliform, fecal general | geometric mean | ≤ 200 #/100mL | all year | 001 |
| Coliform, fecal general | instantaneous maximum | ≤ 1000 #/100mL | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 24 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 12 mg/L | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 36 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 18 mg/L | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 1440 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 720 lb/d | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 2160 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 1080 lb/d | May–Oct | 001 |
| TU Static 7Day Chronic Ceriodaphnia dubia | daily maximum | ≤ 1.3 tox chronic | all year | 001 |
| Static 7Day Chronic Pimephales Promelas | daily maximum | report only (tox chronic) | all year | 001 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | report only (mg/L) | all year | 005 |
| pH | daily maximum | report only (SU) | all year | 005 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 005 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 005 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 005 |
| Iron, dissolved [as Fe] | daily maximum | report only (mg/L) | all year | 005 |
| Coliform, fecal general | daily maximum | report only (#/100mL) | all year | 005 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | all year | 005 |
| Parameter | New limit | New or tighter | Median, last 12 months | × new limit |
|---|---|---|---|---|
| Copper, total [as Cu], monthly average | 0.0233 mg/L | tighter | 0.015 mg/L (9 values) | 0.644× |
Cited limits by parameter: Pennsylvania's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
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