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Sewage treatment plant, major discharger, Doylestown, Pennsylvania. NPDES permit PA0021181, in force until Jun 30, 2030. Last 12 months: no values over a limit, 61 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 |
| 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 | ≤ 300 lb/d | all year | 001 |
| Solids, total suspended | weekly average | ≤ 450 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, ammonia total [as N] | monthly average | ≤ 1.5 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 4.5 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 15 lb/d | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 45 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 | ≤ 9.5 mg/L | May–Oct | 001 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrite + Nitrate total [as N] | monthly average | ≤ 95 lb/d | May–Oct | 001 |
| Nitrite + Nitrate total [as N] | monthly average | report only (lb/d) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Phosphorus, total [as P] | monthly average | ≤ .85 mg/L | Apr–Oct | 001 |
| Phosphorus, total [as P] | monthly average | ≤ 1.7 mg/L | Jan, Feb, Mar, Nov, Dec | 001 |
| Phosphorus, total [as P] | monthly average | ≤ 8.5 lb/d | Apr–Oct | 001 |
| Phosphorus, total [as P] | monthly average | ≤ 17 lb/d | Jan, Feb, Mar, Nov, Dec | 001 |
| Hardness, total [as CaCO3] | quarterly average | report only (mg/L) | all year | 001 |
| Cadmium, total [as Cd] | quarterly average | report only (mg/L) | all year | 001 |
| Copper, total [as Cu] | monthly average | ≤ .036 mg/L | all year | 001 |
| Copper, total [as Cu] | daily maximum | ≤ .056 mg/L | all year | 001 |
| Iron, dissolved [as Fe] | quarterly average | report only (mg/L) | all year | 001 |
| Zinc, total [as Zn] | quarterly average | report only (mg/L) | all year | 001 |
| Aluminum, total [as Al] | quarterly average | report only (mg/L) | all year | 001 |
| Hexachlorobutadiene | quarterly average | report only (mg/L) | all year | 001 |
| Ultraviolet light intensity | instantaneous 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 | weekly average | report only (MGD) | all year | 001 |
| E. coli | monthly average | report only (#/100mL) | all year | 001 |
| Cyanide, free available | quarterly average | report only (mg/L) | all year | 001 |
| Perfluorooctanoic acid (PFOA) | quarterly average | report only (ug/L) | all year | 001 |
| Perfluorobutanoic acid (PFBA) | quarterly average | report only (ug/L) | all year | 001 |
| Perfluorooctanesulfonate | quarterly average | report only (ug/L) | all year | 001 |
| Perfluorobutanesulfonic acid (PFBS) | quarterly average | report only (ug/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 | daily maximum | report only (mg/L) | all year | 001 |
| Mercury, total [as Hg] | quarterly average | report only (mg/L) | all year | 001 |
| Coliform, fecal general | geometric mean | ≤ 200 #/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| Coliform, fecal general | geometric mean | ≤ 200 #/100mL | May–Sep | 001 |
| Coliform, fecal general | instantaneous maximum | ≤ 1000 #/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| Coliform, fecal general | instantaneous maximum | ≤ 1000 #/100mL | May–Sep | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 25 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 15 mg/L | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 40 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 23 mg/L | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 250 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 150 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] | weekly average | ≤ 230 lb/d | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly 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, dissolved [DO] | instantaneous minimum | ≥ 5 mg/L | all year | 002 |
| Oxygen, dissolved [DO] | monthly average | report only (mg/L) | 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 | ≤ 50 lb/d | all year | 002 |
| Solids, total suspended | weekly average | ≤ 75 lb/d | all year | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.5 mg/L | May–Oct | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 4.5 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.5 lb/d | May–Oct | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 7.5 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (lb/d) | all year | 002 |
| Nitrite + Nitrate total [as N] | monthly average | ≤ 9.5 mg/L | May–Oct | 002 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| Nitrite + Nitrate total [as N] | monthly average | ≤ 16 lb/d | May–Oct | 002 |
| Nitrite + Nitrate total [as N] | monthly average | report only (lb/d) | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| Phosphorus, total [as P] | monthly average | ≤ 1.7 mg/L | Jan, Feb, Mar, Nov, Dec | 002 |
| Phosphorus, total [as P] | monthly average | ≤ .85 mg/L | Apr–Oct | 002 |
| Phosphorus, total [as P] | monthly average | ≤ 2.8 lb/d | Jan, Feb, Mar, Nov, Dec | 002 |
| Phosphorus, total [as P] | monthly average | ≤ 1.4 lb/d | Apr–Oct | 002 |
| Ultraviolet light intensity | instantaneous minimum | report only (mW/cm2) | 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 | weekly average | report only (MGD) | all year | 002 |
| E. coli | monthly average | report only (#/100mL) | all year | 002 |
| Solids, total dissolved | daily maximum | report only (mg/L) | 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 | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 15 mg/L | May–Oct | 002 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 40 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 23 mg/L | May–Oct | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 42 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 25 lb/d | May–Oct | 002 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 66 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 002 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 38 lb/d | May–Oct | 002 |
| Oxygen demand, chem. [high level] [COD] | annual average | report only (mg/L) | all year | 003 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | report only (mg/L) | all year | 003 |
| pH | annual average | report only (SU) | all year | 003 |
| pH | daily maximum | report only (SU) | all year | 003 |
| Solids, total suspended | annual average | report only (mg/L) | all year | 003 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 003 |
| Oil & Grease | annual average | report only (mg/L) | all year | 003 |
| Oil & Grease | daily maximum | report only (mg/L) | all year | 003 |
| Nitrogen, Kjeldahl, total [as N] | annual average | report only (mg/L) | all year | 003 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 003 |
| Phosphorus, total [as P] | annual average | report only (mg/L) | all year | 003 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 003 |
| Iron, dissolved [as Fe] | annual average | report only (mg/L) | all year | 003 |
| Iron, dissolved [as Fe] | daily maximum | report only (mg/L) | all year | 003 |
| Coliform, fecal general | annual average | report only (#/100mL) | all year | 003 |
| Coliform, fecal general | daily maximum | report only (#/100mL) | all year | 003 |
| BOD, carbonaceous [5 day, 20 C] | annual average | report only (mg/L) | all year | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | all year | 003 |
| Oxygen demand, chem. [high level] [COD] | annual average | report only (mg/L) | all year | 004 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | report only (mg/L) | all year | 004 |
| pH | annual average | report only (SU) | all year | 004 |
| pH | daily maximum | report only (SU) | all year | 004 |
| Solids, total suspended | annual average | report only (mg/L) | all year | 004 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 004 |
| Oil & Grease | annual average | report only (mg/L) | all year | 004 |
| Oil & Grease | daily maximum | report only (mg/L) | all year | 004 |
| Nitrogen, Kjeldahl, total [as N] | annual average | report only (mg/L) | all year | 004 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 004 |
| Phosphorus, total [as P] | annual average | report only (mg/L) | all year | 004 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 004 |
| Iron, dissolved [as Fe] | annual average | report only (mg/L) | all year | 004 |
| Iron, dissolved [as Fe] | daily maximum | report only (mg/L) | all year | 004 |
| Coliform, fecal general | annual average | report only (#/100mL) | all year | 004 |
| Coliform, fecal general | daily maximum | report only (#/100mL) | all year | 004 |
| BOD, carbonaceous [5 day, 20 C] | annual average | report only (mg/L) | all year | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | all year | 004 |
Cited limits by parameter: Pennsylvania's rules and the federal ones.
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