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Blast Furnaces And Steel Mills, Monessen, Pennsylvania. NPDES permit PA0217034, in force until Dec 31, 2030. Last 12 months: no values over a limit, 42 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. fahrenheit | daily maximum | ≤ 110 deg F | all year | 001 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 001 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 001 |
| Oil & Grease | monthly average | ≤ 15 mg/L | all year | 001 |
| Oil & Grease | instantaneous maximum | ≤ 30 mg/L | all year | 001 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 001 |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | all year | 001 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 001 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 001 |
| Aluminum, total [as Al] | daily maximum | report only (mg/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 | ≤ 1.25 mg/L | 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) | daily maximum | report only (ng/L) | all year | 001 |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) | daily maximum | report only (ng/L) | all year | 001 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 002 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | instantaneous maximum | ≤ 50 mg/L | all year | 002 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 002 |
| Oil & Grease | instantaneous maximum | report only (mg/L) | all year | 002 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 002 |
| Nitrogen, total [as N] | instantaneous maximum | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | instantaneous maximum | report only (mg/L) | all year | 002 |
| Copper, total [as Cu] | monthly average | report only (mg/L) | all year | 002 |
| Copper, total [as Cu] | instantaneous maximum | report only (mg/L) | all year | 002 |
| Iron, total [as Fe] | monthly average | report only (mg/L) | all year | 002 |
| Iron, total [as Fe] | instantaneous maximum | report only (mg/L) | all year | 002 |
| Iron, dissolved [as Fe] | monthly average | report only (mg/L) | all year | 002 |
| Iron, dissolved [as Fe] | instantaneous maximum | ≤ 7 mg/L | all year | 002 |
| Lead, total [as Pb] | monthly average | report only (mg/L) | all year | 002 |
| Lead, total [as Pb] | instantaneous maximum | report only (mg/L) | all year | 002 |
| Manganese, total [as Mn] | monthly average | report only (mg/L) | all year | 002 |
| Manganese, total [as Mn] | instantaneous maximum | report only (mg/L) | all year | 002 |
| Zinc, total [as Zn] | monthly average | report only (mg/L) | all year | 002 |
| Zinc, total [as Zn] | instantaneous maximum | report only (mg/L) | all year | 002 |
| Aluminum, total [as Al] | monthly average | report only (mg/L) | all year | 002 |
| Aluminum, total [as Al] | instantaneous maximum | report only (mg/L) | 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 |
| pH | instantaneous minimum | report only (SU) | all year | 101 |
| pH | instantaneous maximum | report only (SU) | all year | 101 |
| Solids, total suspended | quarterly average | ≤ 29.7 mg/L | all year | 101 |
| Solids, total suspended | daily maximum | ≤ 72.8 mg/L | all year | 101 |
| Solids, total suspended | quarterly average | ≤ 278 lb/d | all year | 101 |
| Solids, total suspended | daily maximum | ≤ 539 lb/d | all year | 101 |
| Oil & Grease | quarterly average | ≤ 7.76 mg/L | all year | 101 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 101 |
| Oil & Grease | quarterly average | ≤ 23.9 lb/d | all year | 101 |
| Oil & Grease | daily maximum | ≤ 70.3 lb/d | all year | 101 |
| Nitrogen, ammonia total [as N] | quarterly average | ≤ 25 mg/L | all year | 101 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 85 mg/L | all year | 101 |
| Nitrogen, ammonia total [as N] | quarterly average | ≤ 46.4 lb/d | all year | 101 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 156 lb/d | all year | 101 |
| Cyanide, total [as CN] | monthly average | report only (mg/L) | all year | 101 |
| Cyanide, total [as CN] | daily maximum | report only (mg/L) | all year | 101 |
| Cyanide, total [as CN] | monthly average | ≤ 12.6 lb/d | all year | 101 |
| Cyanide, total [as CN] | daily maximum | ≤ 21.2 lb/d | all year | 101 |
| Phenolics, total recoverable | quarterly average | ≤ .05 mg/L | all year | 101 |
| Phenolics, total recoverable | daily maximum | ≤ .1 mg/L | all year | 101 |
| Phenolics, total recoverable | quarterly average | ≤ .092 lb/d | all year | 101 |
| Phenolics, total recoverable | daily maximum | ≤ .185 lb/d | all year | 101 |
| Benzo[a]pyrene | quarterly average | ≤ 12.97 ug/L | all year | 101 |
| Benzo[a]pyrene | daily maximum | ≤ 23.25 ug/L | all year | 101 |
| Benzo[a]pyrene | quarterly average | ≤ .019 lb/d | all year | 101 |
| Benzo[a]pyrene | daily maximum | ≤ .033 lb/d | all year | 101 |
| Naphthalene | quarterly average | ≤ 13.07 ug/L | all year | 101 |
| Naphthalene | daily maximum | ≤ 23.44 ug/L | all year | 101 |
| Naphthalene | quarterly average | ≤ .019 lb/d | all year | 101 |
| Naphthalene | daily maximum | ≤ .034 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 |
Cited limits by parameter: Pennsylvania's rules and the federal ones.
Same industry: the 85 Primary Metal Industries permits in Pennsylvania.
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On EPA ECHO: Facility report · DMR history
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