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Sewage treatment plant, major discharger, Donora, Pennsylvania. NPDES permit PA0026158, in force until Jan 31, 2031. Last 12 months: over a limit 6 times (last May 2026), 56 required values missing, 4 of 21 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| March 2026 | Solids, suspended percent removal, instantaneous minimum | 57 % | ≥ 60 % | 8% |
| April 2026 | Solids, suspended percent removal, instantaneous minimum | 36.8 % | ≥ 60 % | 58% |
| May 2026 | BOD, carb-5 day, 20 deg C, percent removal, instantaneous minimum | 32.7 % | ≥ 35 % | 4% |
| May 2026 | Coliform, fecal general, geometric mean | 2420 #/100mL | ≤ 200 #/100mL | 1110% |
| May 2026 | Coliform, fecal general, instantaneous maximum | 2420 #/100mL | ≤ 1000 #/100mL | 142% |
| May 2026 | Solids, suspended percent removal, instantaneous minimum | 41.4 % | ≥ 60 % | 47% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 4 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 | ≤ 1240 lb/d | all year | 001 |
| Solids, total suspended | weekly average | ≤ 1860 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] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | weekly average | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) | all year | 001 |
| Nitrogen, ammonia total [as N] | weekly average | report only (lb/d) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | 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 |
| 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 |
| Perfluorooctanoic acid (PFOA) | daily maximum | report only (ng/L) | all year | 001 |
| Perfluorooctanesulfonate | daily maximum | report only (ng/L) | all year | 001 |
| Perfluorobutanesulfonic acid (PFBS) | instantaneous maximum | report only (ng/L) | all year | 001 |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) | daily maximum | report only (ng/L) | 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 | ≤ 38 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 1030 lb/d | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly average | ≤ 1570 lb/d | all year | 001 |
| Oxygen, dissolved [DO] | instantaneous minimum | report only (mg/L) | all year | 007 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 007 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 007 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 007 |
| Solids, total suspended | weekly average | report only (mg/L) | all year | 007 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 007 |
| Solids, total suspended | instantaneous maximum | report only (mg/L) | all year | 007 |
| Nitrogen, total [as N] | instantaneous maximum | report only (mg/L) | all year | 007 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 007 |
| Nitrogen, ammonia total [as N] | instantaneous maximum | report only (mg/L) | all year | 007 |
| Phosphorus, total [as P] | instantaneous maximum | report only (mg/L) | all year | 007 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 007 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 007 |
| Chlorine, total residual | monthly average | ≤ .5 mg/L | all year | 007 |
| Chlorine, total residual | instantaneous maximum | ≤ 1.6 mg/L | all year | 007 |
| E. coli | instantaneous maximum | report only (#/100mL) | all year | 007 |
| Coliform, fecal general | geometric mean | ≤ 200 #/100mL | May–Sep | 007 |
| Coliform, fecal general | geometric mean | ≤ 2000 #/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 007 |
| Coliform, fecal general | instantaneous maximum | ≤ 1000 #/100mL | May–Sep | 007 |
| Coliform, fecal general | instantaneous maximum | ≤ 10000 #/100mL | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 007 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | all year | 007 |
| BOD, carbonaceous [5 day, 20 C] | instantaneous maximum | report only (mg/L) | all year | 007 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | all year | 007 |
| BOD, carbonaceous [5 day, 20 C] | instantaneous maximum | report only (mg/L) | all year | 007 |
| BOD, carb-5 day, 20 deg C, percent removal | instantaneous minimum | ≥ 35 % | all year | 007 |
| Solids, suspended percent removal | instantaneous minimum | ≥ 60 % | all year | 007 |
Cited limits by parameter: Pennsylvania's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
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