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Blast Furnaces And Steel Mills, major discharger, Delta, Ohio. NPDES permit OH0122386, in force until Jan 31, 2029. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 001 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 001 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 5 mg/L | all year | 001 |
| Oil and grease, hexane extr method | daily maximum | ≤ 10 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | ≤ 1 mg/L | all year | 001 |
| Phosphorus, total [as P] | daily maximum | ≤ 1.1 kg/d | all year | 001 |
| Iron, total recoverable | monthly average | report only (ug/L) | Jun, Dec | 001 |
| Iron, total recoverable | daily maximum | report only (ug/L) | Jun, Dec | 001 |
| Nickel, total recoverable | monthly average | report only (ug/L) | Jun, Dec | 001 |
| Nickel, total recoverable | daily maximum | report only (ug/L) | Jun, Dec | 001 |
| Zinc, total recoverable | daily maximum | ≤ 450 ug/L | all year | 001 |
| Zinc, total recoverable | daily maximum | ≤ .49 kg/d | all year | 001 |
| Lead, total recoverable | daily maximum | ≤ 640 ug/L | all year | 001 |
| Lead, total recoverable | daily maximum | ≤ .7 kg/d | all year | 001 |
| Copper, total recoverable | monthly average | report only (ug/L) | Jun, Dec | 001 |
| Copper, total recoverable | daily maximum | report only (ug/L) | Jun, Dec | 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 | daily maximum | ≤ .038 mg/L | all year | 001 |
| Mercury, total low level | monthly average | ≤ 2.42 ng/L | all year | 001 |
| Mercury, total low level | daily maximum | ≤ 1700 ng/L | all year | 001 |
| Mercury, total low level | monthly average | ≤ .0000027 kg/d | all year | 001 |
| Mercury, total low level | daily maximum | ≤ .00187 kg/d | all year | 001 |
| Toxicity [acute], Ceriodaphnia dubia | daily maximum | ≤ 1 tox acute | Mar, Jun, Aug, Dec | 001 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | monthly average | report only (tox acute) | Jun, Dec | 001 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum | report only (tox acute) | Jun, Dec | 001 |
| pH, maximum | daily maximum | ≤ 9 SU | all year | 001 |
| pH, minimum | daily minimum | ≥ 6.5 SU | all year | 001 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | all year | 001 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | all year | 001 |
| Zinc, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 002 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 002 |
| Aluminum, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 002 |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 002 |
| Zinc, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 003 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 003 |
| Aluminum, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 003 |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 003 |
| Zinc, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 004 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 004 |
| Aluminum, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 004 |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 004 |
| Mercury, total low level | monthly average | report only (ng/L) | all year | 600 |
| Mercury, total low level | daily maximum | report only (ng/L) | all year | 600 |
| pH | daily minimum | ≥ 6 SU | all year | 601 |
| pH | daily maximum | ≤ 9 SU | all year | 601 |
| Solids, total suspended | monthly average | ≤ 80.8 kg/d | all year | 601 |
| Solids, total suspended | daily maximum | ≤ 217 kg/d | all year | 601 |
| Oil and grease, hexane extr method | monthly average | ≤ 8.77 kg/d | all year | 601 |
| Oil and grease, hexane extr method | daily maximum | ≤ 59.9 kg/d | all year | 601 |
| Lead, total [as Pb] | monthly average | ≤ .22 kg/d | all year | 601 |
| Lead, total [as Pb] | daily maximum | ≤ .645 kg/d | all year | 601 |
| Zinc, total [as Zn] | monthly average | ≤ .322 kg/d | all year | 601 |
| Zinc, total [as Zn] | daily maximum | ≤ .968 kg/d | all year | 601 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 601 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 601 |
Cited limits by parameter: Ohio's rules and the federal ones.
Same industry: the 56 Primary Metal Industries permits in Ohio.
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On EPA ECHO: Facility report · DMR history
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