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Sewage treatment plant, major discharger, Conshohocken, Pennsylvania. NPDES permit PA0026794, in force until Jul 31, 2027. Last 12 months: over a limit 2 times (last May 2026), 33 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| April 2026 | Coliform, fecal general, 90% of samples | 2419.6 #/100mL | ≤ 1000 #/100mL | 142% |
| May 2026 | Coliform, fecal general, instantaneous maximum | 1540.2 #/100mL | ≤ 1000 #/100mL | 54% |
| 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 | 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 | ≤ 575 lb/d | all year | 001 |
| Solids, total suspended | weekly average | ≤ 863 lb/d | all year | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | 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 | ≤ 8 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 20 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 153 lb/d | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 384 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year | 001 |
| Cadmium, total [as Cd] | quarterly average | report only (mg/L) | all year | 001 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year | 001 |
| Copper, total [as Cu] | monthly average | ≤ .0654 mg/L | all year | 001 |
| Copper, total [as Cu] | daily maximum | ≤ .115 mg/L | all year | 001 |
| Copper, total [as Cu] | monthly average | ≤ 1.25 lb/d | all year | 001 |
| Copper, total [as Cu] | daily maximum | ≤ 2.22 lb/d | all year | 001 |
| Silver, total [as Ag] | quarterly average | report only (mg/L) | all year | 001 |
| Silver, total [as Ag] | daily maximum | 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 |
| Heptachlor | monthly average | ≤ .0004 ug/L | all year | 001 |
| Heptachlor | daily maximum | ≤ .0007 ug/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 | ≤ .5 mg/L | all year | 001 |
| Chlorine, total residual | instantaneous maximum | ≤ 1.6 mg/L | all year | 001 |
| E. coli | instantaneous maximum | report only (#/100mL) | all year | 001 |
| PCBs Wet Weather Analysis | daily maximum | report only (pg/L) | all year | 001 |
| PCBs Dry Weather Analysis | daily maximum | report only (pg/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 |
| Mercury, total [as Hg] | quarterly average | report only (mg/L) | all year | 001 |
| Mercury, total [as Hg] | daily maximum | report only (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 | 90% of samples | ≤ 1000 #/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 20 mg/L | May–Oct | 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] | weekly average | ≤ 30 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] | monthly average | ≤ 384 lb/d | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 480 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 575 lb/d | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 767 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 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] | daily maximum | report only (mg/L) | all year | 002 |
| pH | daily maximum | report only (SU) | all year | 002 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 002 |
| Oil & Grease | daily maximum | report only (mg/L) | all year | 002 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 002 |
| Iron, dissolved [as Fe] | daily maximum | report only (mg/L) | all year | 002 |
| Coliform, fecal general | daily maximum | report only (#/100mL) | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | all year | 002 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | report only (mg/L) | all year | 003 |
| pH | daily maximum | report only (SU) | all year | 003 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 003 |
| Oil & Grease | daily maximum | 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] | daily maximum | report only (mg/L) | all year | 003 |
| Iron, dissolved [as Fe] | daily maximum | report only (mg/L) | all year | 003 |
| Coliform, fecal general | daily maximum | report only (#/100mL) | all year | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | all year | 003 |
Cited limits by parameter: Pennsylvania's rules and the federal ones.
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