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Bituminous Coal And Lignite - Surface, Powhatan Point, Ohio. NPDES permit OH0011681, in force until Jan 31, 2031. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| pH | daily minimum | ≥ 6.5 SU | all year |
| pH | daily maximum | ≤ 9 SU | all year |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year |
| Chloride [as Cl] | monthly average | report only (mg/L) | all year |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year |
| Sulfate, total [as SO4] | daily maximum | ≤ 2142 mg/L | all year |
| Cobalt, total recoverable | monthly average | ≤ 24 ug/L | all year |
| Cobalt, total recoverable | daily maximum | ≤ 220 ug/L | all year |
| Boron, total recoverable | monthly average | ≤ 3900 ug/L | all year |
| Boron, total recoverable | daily maximum | ≤ 33000 ug/L | all year |
| Iron, total [as Fe] | monthly average | ≤ 3500 ug/L | all year |
| Iron, total [as Fe] | daily maximum | ≤ 7000 ug/L | all year |
| Manganese, total [as Mn] | monthly average | ≤ 2000 ug/L | all year |
| Manganese, total [as Mn] | daily maximum | ≤ 4000 ug/L | all year |
| Nickel, total recoverable | monthly average | ≤ 101 ug/L | all year |
| Nickel, total recoverable | daily maximum | ≤ 892 ug/L | all year |
| Zinc, total recoverable | daily maximum | ≤ 228 ug/L | all year |
| Lead, total recoverable | monthly average | ≤ 17 ug/L | all year |
| Lead, total recoverable | daily maximum | ≤ 322 ug/L | all year |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| Mercury, total low level | monthly average | ≤ 12 ng/L | all year |
| Mercury, total low level | daily maximum | ≤ 1700 ng/L | all year |
| Solids, total dissolved- 180 deg. C | monthly average | ≤ 1500 mg/L | all year |
Cited limits by parameter: Ohio's rules and the federal ones.
Same industry: the 38 Coal Mining permits in Ohio.
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Your permit document is the final word. As JSON: /api/v1/permits/OH0011681 · MCP: https://passage-data.com/mcp