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Sewage treatment plant, major discharger, King Of Prussia, Pennsylvania. NPDES permit PA0026131, in force until Jun 30, 2029. Last 12 months: over a limit 4 times (last February 2026), 32 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| December 2025 | Chlorine, total residual, instantaneous maximum | 1.3 mg/L | ≤ 1.2 mg/L | 8% |
| February 2026 | BOD, carbonaceous [5 day, 20 C], monthly average | 40.1 mg/L | ≤ 25 mg/L | 60% |
| February 2026 | BOD, carbonaceous [5 day, 20 C], weekly average | 67.8 mg/L | ≤ 40 mg/L | 70% |
| February 2026 | Nitrogen, ammonia total [as N], monthly average | 24.85 mg/L | ≤ 20 mg/L | 24% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 5 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | report only (lb/d) | all year | 002 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 002 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 002 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year | 002 |
| Solids, total suspended | monthly average | ≤ 1500 lb/d | all year | 002 |
| Solids, total suspended | weekly average | ≤ 2250 lb/d | all year | 002 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 002 |
| Solids, total suspended | monthly average | report only (lb/d) | all year | 002 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Nitrogen, total [as N] | monthly average | report only (lb/d) | all year | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 15 mg/L | May–Oct | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 20 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 750 lb/d | May–Oct | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1000 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year | 002 |
| Copper, total [as Cu] | monthly average | ≤ .041 mg/L | all year | 002 |
| Copper, total [as Cu] | daily maximum | ≤ .048 mg/L | all year | 002 |
| Copper, total [as Cu] | monthly average | ≤ 2.05 lb/d | all year | 002 |
| Copper, total [as Cu] | daily maximum | ≤ 2.4 lb/d | all year | 002 |
| Zinc, total [as Zn] | quarterly average | report only (mg/L) | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Chlorine, total residual | monthly average | ≤ .5 mg/L | all year | 002 |
| Chlorine, total residual | instantaneous maximum | ≤ 1.2 mg/L | all year | 002 |
| E. coli | instantaneous maximum | report only (#/100mL) | all year | 002 |
| PCBs Dry Weather Analysis | daily maximum | report only (pg/L) | all year | 002 |
| Toxicity [chronic], Ceriodaphnia dubia | daily maximum | report only (tox chronic) | all year | 002 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | daily maximum | report only (tox chronic) | all year | 002 |
| Solids, total dissolved | quarterly average | ≤ 1000 mg/L | all year | 002 |
| Solids, total dissolved | quarterly average | report only (lb/d) | all year | 002 |
| Coliform, fecal general | geometric mean | ≤ 200 #/100mL | May–Sep | 002 |
| Coliform, fecal general | geometric mean | ≤ 200 #/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 002 |
| Coliform, fecal general | instantaneous maximum | ≤ 1000 #/100mL | May–Sep | 002 |
| Coliform, fecal general | instantaneous maximum | ≤ 1000 #/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 25 mg/L | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 40 mg/L | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 1251 lb/d | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 2000 lb/d | all year | 002 |
| TU Static 7Day Chronic Ceriodaphnia dubia | daily maximum | report only (tox chronic) | all year | 002 |
| Static 7Day Chronic Pimephales Promelas | daily maximum | report only (tox chronic) | all year | 002 |
| Oxygen demand, chem. [high level] [COD] | annual average | report only (mg/L) | all year | 003 |
| pH | annual average | report only (SU) | all year | 003 |
| Solids, total suspended | annual average | report only (mg/L) | all year | 003 |
| Oil & Grease | annual average | report only (mg/L) | all year | 003 |
| Nitrogen, Kjeldahl, total [as N] | annual average | report only (mg/L) | all year | 003 |
| Phosphorus, total [as P] | annual average | report only (mg/L) | all year | 003 |
| Iron, dissolved [as Fe] | annual average | report only (mg/L) | all year | 003 |
| Coliform, fecal general | annual average | report only (#/100mL) | all year | 003 |
| BOD, carbonaceous [5 day, 20 C] | annual average | report only (mg/L) | all year | 003 |
Cited limits by parameter: Pennsylvania's rules and the federal ones.
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