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Gray And Ductile Iron Foundries, Orrville, Ohio. NPDES permit OH0126322, in force until May 31, 2028. Last 12 months: no values over a limit, 30 of 66 reports late. 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 |
| pH | daily minimum | ≥ 6.5 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| Oil and grease, hexane extr method | monthly average | report only (mg/L) | all year | 001 |
| Oil and grease, hexane extr method | 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 |
| pH | daily minimum | ≥ 6.5 SU | all year | 002 |
| pH | daily maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 002 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 002 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | all year | 002 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 002 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| Aluminum, total recoverable | monthly average | report only (ug/L) | all year | 002 |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| Copper, total recoverable | monthly average | report only (ug/L) | all year | 002 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| Rainfall | monthly average | 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 |
| pH | daily minimum | ≥ 6.5 SU | all year | 003 |
| pH | daily maximum | ≤ 9 SU | all year | 003 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 003 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 003 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | all year | 003 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Aluminum, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Copper, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Rainfall | monthly average | report only (in) | all year | 003 |
| Rainfall | daily maximum | report only (in) | all year | 003 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| pH | daily minimum | ≥ 6.5 SU | all year | 004 |
| pH | daily maximum | ≤ 9 SU | all year | 004 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 004 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 004 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | all year | 004 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 004 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 004 |
| Aluminum, total recoverable | monthly average | report only (ug/L) | all year | 004 |
| Aluminum, total recoverable | daily maximum | report only (ug/L) | all year | 004 |
| Copper, total recoverable | monthly average | report only (ug/L) | all year | 004 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 004 |
| Rainfall | monthly average | report only (in) | all year | 004 |
| Rainfall | daily maximum | report only (in) | all year | 004 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 004 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 605 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 605 |
| pH | daily minimum | ≥ 6.5 SU | all year | 605 |
| pH | daily maximum | ≤ 9 SU | all year | 605 |
| Oil and grease, hexane extr method | monthly average | report only (mg/L) | all year | 605 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | all year | 605 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 605 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 605 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 606 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 606 |
| pH | daily minimum | ≥ 6.5 SU | all year | 606 |
| pH | daily maximum | ≤ 9 SU | all year | 606 |
| Oil and grease, hexane extr method | monthly average | report only (mg/L) | all year | 606 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | all year | 606 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 606 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 606 |
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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