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Sewage treatment plant, St Clair, Pennsylvania. NPDES permit PA0025224, in force until Feb 28, 2030. Last 12 months: over a limit once (last May 2026), 102 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| May 2026 | Coliform, fecal general, instantaneous maximum | 2420 #/100mL | ≤ 1000 #/100mL | 142% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 3 mg/L | 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 | ≤ 187.6 lb/d | all year | 001 |
| Solids, total suspended | weekly average | ≤ 281.4 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, total [as N] | monthly average | report only (lb/d) | all year | 001 |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 24.7 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 49.4 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) | May–Oct | 001 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (lb/d) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | 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] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrite + Nitrate total [as N] | monthly average | report only (lb/d) | all year | 001 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (lb/d) | all year | 001 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | all year | 001 |
| Copper, total [as Cu] | monthly average | report only (mg/L) | all year | 001 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 001 |
| Copper, total [as Cu] | monthly average | report only (lb/d) | all year | 001 |
| Copper, total [as Cu] | daily maximum | report only (lb/d) | all year | 001 |
| Iron, total [as Fe] | monthly average | report only (mg/L) | all year | 001 |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | all year | 001 |
| Iron, total [as Fe] | monthly average | report only (lb/d) | all year | 001 |
| Iron, total [as Fe] | daily maximum | report only (lb/d) | all year | 001 |
| Lead, total [as Pb] | monthly average | report only (mg/L) | all year | 001 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 001 |
| Lead, total [as Pb] | monthly average | report only (lb/d) | all year | 001 |
| Lead, total [as Pb] | daily maximum | report only (lb/d) | all year | 001 |
| Manganese, total [as Mn] | monthly average | report only (mg/L) | all year | 001 |
| Manganese, total [as Mn] | daily maximum | report only (mg/L) | all year | 001 |
| Manganese, total [as Mn] | monthly average | report only (lb/d) | all year | 001 |
| Manganese, total [as Mn] | daily maximum | report only (lb/d) | all year | 001 |
| Zinc, total [as Zn] | monthly average | report only (mg/L) | all year | 001 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 001 |
| Zinc, total [as Zn] | monthly average | report only (lb/d) | all year | 001 |
| Zinc, total [as Zn] | daily maximum | report only (lb/d) | all year | 001 |
| Aluminum, total [as Al] | monthly average | report only (mg/L) | all year | 001 |
| Aluminum, total [as Al] | daily maximum | report only (mg/L) | all year | 001 |
| Aluminum, total [as Al] | monthly average | report only (lb/d) | all year | 001 |
| Aluminum, total [as Al] | daily maximum | report only (lb/d) | all year | 001 |
| Ultraviolet light intensity | instantaneous minimum | report only (uW/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 |
| Chlorine, total residual | monthly average | report only (mg/L) | all year | 001 |
| Chlorine, total residual | instantaneous maximum | ≤ .75 mg/L | all year | 001 |
| E. coli | instantaneous maximum | report only (#/100mL) | all year | 001 |
| Coliform, fecal general | geometric mean | ≤ 2000 #/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| Coliform, fecal general | geometric mean | ≤ 200 #/100mL | May–Sep | 001 |
| Coliform, fecal general | instantaneous maximum | ≤ 10000 #/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 | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 40 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 156 lb/d | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 250 lb/d | all year | 001 |
| BOD, 5-day, percent removal | monthly average minimum | report only (%) | all year | 001 |
| Solids, suspended percent removal | monthly average minimum | report only (%) | all year | 001 |
| pH | instantaneous minimum | report only (SU) | all year | 002 |
| pH | instantaneous minimum | report only (SU) | all year | 002 |
| pH | instantaneous maximum | report only (SU) | all year | 002 |
| pH | instantaneous maximum | report only (SU) | all year | 002 |
| Copper, total [as Cu] | annual average | report only (ug/L) | all year | 002 |
| Copper, total [as Cu] | daily maximum | report only (ug/L) | all year | 002 |
| Copper, total [as Cu] | annual average | report only (lb/d) | all year | 002 |
| Copper, total [as Cu] | daily maximum | report only (lb/d) | all year | 002 |
| Iron, total [as Fe] | annual average | report only (ug/L) | all year | 002 |
| Iron, total [as Fe] | daily maximum | report only (ug/L) | all year | 002 |
| Iron, total [as Fe] | annual average | report only (lb/d) | all year | 002 |
| Iron, total [as Fe] | daily maximum | report only (lb/d) | all year | 002 |
| Lead, total [as Pb] | annual average | report only (ug/L) | all year | 002 |
| Lead, total [as Pb] | daily maximum | report only (ug/L) | all year | 002 |
| Lead, total [as Pb] | annual average | report only (lb/d) | all year | 002 |
| Lead, total [as Pb] | daily maximum | report only (lb/d) | all year | 002 |
| Manganese, total [as Mn] | annual average | report only (ug/L) | all year | 002 |
| Manganese, total [as Mn] | daily maximum | report only (ug/L) | all year | 002 |
| Manganese, total [as Mn] | annual average | report only (lb/d) | all year | 002 |
| Manganese, total [as Mn] | daily maximum | report only (lb/d) | all year | 002 |
| Zinc, total [as Zn] | annual average | report only (ug/L) | all year | 002 |
| Zinc, total [as Zn] | daily maximum | report only (ug/L) | all year | 002 |
| Zinc, total [as Zn] | annual average | report only (lb/d) | all year | 002 |
| Zinc, total [as Zn] | daily maximum | report only (lb/d) | all year | 002 |
| Aluminum, total [as Al] | annual average | report only (ug/L) | all year | 002 |
| Aluminum, total [as Al] | daily maximum | report only (ug/L) | all year | 002 |
| Aluminum, total [as Al] | annual average | report only (lb/d) | all year | 002 |
| Aluminum, total [as Al] | daily maximum | report only (lb/d) | all year | 002 |
| Rainfall | monthly total | report only (in) | all year | 002 |
| Rainfall | daily maximum | report only (in) | 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 | report only (mg/L) | all year | 002 |
| Chlorine, total residual | instantaneous maximum | report only (mg/L) | all year | 002 |
| E. coli | instantaneous maximum | report only (#/100mL) | all year | 002 |
| Coliform, fecal general | instantaneous maximum | report only (#/100mL) | Apr–Oct | 002 |
| Duration of discharge | monthly total | report only (hr) | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 101 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 101 |
| BOD, 5-day, 20 deg. C | monthly average | report only (lb/d) | all year | 101 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (lb/d) | all year | 101 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 101 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 101 |
| Solids, total suspended | monthly average | report only (lb/d) | all year | 101 |
| Solids, total suspended | daily maximum | report only (lb/d) | all year | 101 |
| Iron, total [as Fe] | monthly average | report only (ug/L) | all year | 101 |
| Iron, total [as Fe] | daily maximum | report only (ug/L) | all year | 101 |
| Iron, total [as Fe] | monthly average | report only (lb/d) | all year | 101 |
| Iron, total [as Fe] | daily maximum | report only (lb/d) | all year | 101 |
| Manganese, total [as Mn] | monthly average | report only (ug/L) | all year | 101 |
| Manganese, total [as Mn] | daily maximum | report only (ug/L) | all year | 101 |
| Manganese, total [as Mn] | monthly average | report only (lb/d) | all year | 101 |
| Manganese, total [as Mn] | daily maximum | report only (lb/d) | all year | 101 |
| Aluminum, total [as Al] | monthly average | report only (ug/L) | all year | 101 |
| Aluminum, total [as Al] | daily maximum | report only (ug/L) | all year | 101 |
| Aluminum, total [as Al] | monthly average | report only (lb/d) | all year | 101 |
| Aluminum, total [as Al] | daily maximum | report only (lb/d) | all year | 101 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 101 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 101 |
| Parameter | New limit | New or tighter | Median, last 12 months | × new limit |
|---|---|---|---|---|
| Copper, total [as Cu], daily maximum | 0.034 mg/L | new | 0.02 mg/L (9 values, 1 below detection) | 0.588× |
| Copper, total [as Cu], daily maximum | 0.21 lb/d | new | 0.06 lb/d (9 values) | 0.286× |
| Copper, total [as Cu], monthly average | 0.16 lb/d | new | 0.03 lb/d (9 values, 7 below detection) | — |
| Copper, total [as Cu], monthly average | 0.025 mg/L | new | 0.01 mg/L (9 values, 6 below detection) | — |
| Lead, total [as Pb], daily maximum | 0.015 mg/L | new | 0.02 mg/L (9 values, 9 below detection) | — |
| Lead, total [as Pb], daily maximum | 0.093 lb/d | new | 0.08 lb/d (9 values, 9 below detection) | — |
| Lead, total [as Pb], monthly average | 0.01 mg/L | new | 0.01 mg/L (9 values, 9 below detection) | — |
| Lead, total [as Pb], monthly average | 0.06 lb/d | new | 0.05 lb/d (9 values, 9 below detection) | — |
| Nitrogen, ammonia total [as N], daily maximum | 26.2 mg/L (May–Oct) | tighter | 0.49 mg/L (3 values) | 0.0187× |
| Nitrogen, ammonia total [as N], monthly average | 13.1 mg/L (May–Oct) | tighter | 0.36 mg/L (3 values) | 0.0275× |
Cited limits by parameter: Pennsylvania's rules and the federal ones.
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