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Sewage treatment plant, major discharger, Doylestown, Pennsylvania. NPDES permit PA0021172, in force until Apr 30, 2027. Last 12 months: no values over a limit, 46 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 5 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 | weekly average | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | report only (lb/d) | all year | 001 |
| BOD, 5-day, 20 deg. C | weekly 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 | ≤ 400 lb/d | all year | 001 |
| Solids, total suspended | weekly average | ≤ 600 lb/d | all year | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 001 |
| Solids, total suspended | weekly average | report only (mg/L) | all year | 001 |
| Solids, total suspended | monthly average | report only (lb/d) | all year | 001 |
| Solids, total suspended | weekly 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] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 26.7 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 13.3 lb/d | May–Oct | 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 | ≤ 10 mg/L | Jul–Oct | 001 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, May, Jun, Nov, Dec | 001 |
| Nitrite + Nitrate total [as N] | monthly average | ≤ 133 lb/d | Jul–Oct | 001 |
| Nitrite + Nitrate total [as N] | monthly average | report only (lb/d) | Jan, Feb, Mar, Apr, May, Jun, Nov, Dec | 001 |
| Phosphorus, total [as P] | monthly average | ≤ .5 mg/L | Apr–Oct | 001 |
| Phosphorus, total [as P] | monthly average | ≤ 1 mg/L | Jan, Feb, Mar, Nov, Dec | 001 |
| Phosphorus, total [as P] | monthly average | ≤ 6.7 lb/d | Apr–Oct | 001 |
| Phosphorus, total [as P] | monthly average | ≤ 13.3 lb/d | Jan, Feb, Mar, Nov, Dec | 001 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year | 001 |
| Copper, total [as Cu] | monthly average | report only (mg/L) | all year | 001 |
| Iron, total [as Fe] | monthly average | report only (mg/L) | all year | 001 |
| Iron, dissolved [as Fe] | monthly average | report only (mg/L) | all year | 001 |
| Zinc, total [as Zn] | quarterly average | report only (mg/L) | all year | 001 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 001 |
| Aluminum, total [as Al] | monthly average | ≤ .75 mg/L | all year | 001 |
| Aluminum, total [as Al] | monthly average | ≤ 10 lb/d | all year | 001 |
| Chloroform | quarterly average | report only (mg/L) | all year | 001 |
| Chloroform | daily maximum | report only (mg/L) | all year | 001 |
| Ultraviolet light intensity | daily minimum | report only (mW/cm2) | 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 |
| E. coli | monthly average | report only (#/100mL) | all year | 001 |
| E. coli | daily maximum | report only (#/100mL) | all year | 001 |
| Cyanide, free available | quarterly average | report only (mg/L) | all year | 001 |
| Cyanide, free available | daily maximum | report only (mg/L) | all year | 001 |
| Toxicity [chronic], Ceriodaphnia dubia | daily maximum | report only (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 | daily maximum | ≤ 2000 mg/L | all year | 001 |
| Coliform, fecal general | geometric mean | ≤ 200 #/100mL | May–Sep | 001 |
| Coliform, fecal general | geometric mean | ≤ 200 #/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| Coliform, fecal general | instantaneous maximum | ≤ 1000 #/100mL | May–Sep | 001 |
| Coliform, fecal general | instantaneous maximum | ≤ 1000 #/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 10 mg/L | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 20 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 15 mg/L | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 30 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 133 lb/d | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 267 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 200 lb/d | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 400 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | report only (mg/L) | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (lb/d) | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | report only (lb/d) | all year | 001 |
| TU Static 7Day Chronic Ceriodaphnia dubia | daily maximum | report only (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] | annual average | report only (mg/L) | all year | 002 |
| pH | annual average | report only (SU) | all year | 002 |
| Solids, total suspended | annual average | report only (mg/L) | all year | 002 |
| Oil & Grease | annual average | report only (mg/L) | all year | 002 |
| Nitrogen, Kjeldahl, total [as N] | annual average | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | annual average | report only (mg/L) | all year | 002 |
| Iron, dissolved [as Fe] | annual average | report only (mg/L) | all year | 002 |
| Coliform, fecal general | annual average | report only (#/100mL) | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | annual average | report only (mg/L) | 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 |
| Oxygen demand, chem. [high level] [COD] | annual average | report only (mg/L) | all year | 004 |
| pH | annual average | report only (SU) | all year | 004 |
| Solids, total suspended | annual average | report only (mg/L) | all year | 004 |
| Oil & Grease | annual average | report only (mg/L) | all year | 004 |
| Nitrogen, Kjeldahl, total [as N] | annual average | report only (mg/L) | all year | 004 |
| Phosphorus, total [as P] | annual average | report only (mg/L) | all year | 004 |
| Iron, dissolved [as Fe] | annual average | report only (mg/L) | all year | 004 |
| Coliform, fecal general | annual average | report only (#/100mL) | all year | 004 |
| BOD, carbonaceous [5 day, 20 C] | annual average | report only (mg/L) | all year | 004 |
| Oxygen demand, chem. [high level] [COD] | annual average | report only (mg/L) | all year | 005 |
| pH | annual average | report only (SU) | all year | 005 |
| Solids, total suspended | annual average | report only (mg/L) | all year | 005 |
| Oil & Grease | annual average | report only (mg/L) | all year | 005 |
| Nitrogen, Kjeldahl, total [as N] | annual average | report only (mg/L) | all year | 005 |
| Phosphorus, total [as P] | annual average | report only (mg/L) | all year | 005 |
| Iron, dissolved [as Fe] | annual average | report only (mg/L) | all year | 005 |
| Coliform, fecal general | annual average | report only (#/100mL) | all year | 005 |
| BOD, carbonaceous [5 day, 20 C] | annual average | report only (mg/L) | all year | 005 |
Cited limits by parameter: Pennsylvania's rules and the federal ones.
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