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Bituminous Coal - Underground, Langsville, Ohio. NPDES permit OH0022829 expired Jul 31, 2026; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | daily minimum | ≥ 6.5 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 001 |
| Solids, settleable | monthly average | report only (mL/L) | all year | 001 |
| Solids, settleable | daily maximum | report only (mL/L) | all year | 001 |
| Chloride [as Cl] | monthly average | report only (mg/L) | all year | 001 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 001 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | all year | 001 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 001 |
| Iron, total [as Fe] | monthly average | ≤ 3500 ug/L | all year | 001 |
| Iron, total [as Fe] | daily maximum | ≤ 7000 ug/L | all year | 001 |
| Manganese, total [as Mn] | monthly average | ≤ 2000 ug/L | all year | 001 |
| Manganese, total [as Mn] | daily maximum | ≤ 4000 ug/L | all year | 001 |
| Copper, total recoverable | monthly average | report only (ug/L) | Jun | 001 |
| Copper, total recoverable | daily maximum | report only (ug/L) | Jun | 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 |
| Solids, total dissolved- 180 deg. C | monthly average | ≤ 1500 mg/L | all year | 001 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 005 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 005 |
| Hydrogen peroxide | daily maximum | ≤ .18 mg/L | all year | 005 |
| pH | daily minimum | ≥ 6.5 SU | all year | 005 |
| pH | daily maximum | ≤ 9 SU | all year | 005 |
| Solids, total suspended | monthly average | ≤ 35 mg/L | all year | 005 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 005 |
| Solids, total suspended | monthly average | ≤ 763 kg/d | all year | 005 |
| Solids, total suspended | daily maximum | ≤ 1530 kg/d | all year | 005 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year | 005 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 005 |
| Chloride [as Cl] | monthly average | report only (mg/L) | all year | 005 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 005 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | all year | 005 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 005 |
| Iron, total [as Fe] | monthly average | ≤ 3500 ug/L | all year | 005 |
| Iron, total [as Fe] | daily maximum | ≤ 7000 ug/L | all year | 005 |
| Iron, total [as Fe] | monthly average | ≤ 76.3 kg/d | all year | 005 |
| Iron, total [as Fe] | daily maximum | ≤ 153 kg/d | all year | 005 |
| Manganese, total [as Mn] | monthly average | ≤ 2000 ug/L | all year | 005 |
| Manganese, total [as Mn] | daily maximum | ≤ 4000 ug/L | all year | 005 |
| Manganese, total [as Mn] | monthly average | ≤ 43.6 kg/d | all year | 005 |
| Manganese, total [as Mn] | daily maximum | ≤ 87.2 kg/d | all year | 005 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 005 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 005 |
| Mercury, total low level | monthly average | report only (ng/L) | Jun, Dec | 005 |
| Mercury, total low level | daily maximum | report only (ng/L) | Jun, Dec | 005 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | all year | 005 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | all year | 005 |
| pH | daily minimum | report only (SU) | all year | 006 |
| pH | daily maximum | report only (SU) | all year | 006 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 006 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 006 |
| Iron, total [as Fe] | monthly average | report only (ug/L) | all year | 006 |
| Iron, total [as Fe] | daily maximum | report only (ug/L) | all year | 006 |
| Manganese, total [as Mn] | monthly average | report only (ug/L) | all year | 006 |
| Manganese, total [as Mn] | daily maximum | report only (ug/L) | all year | 006 |
| Bypass Volume | monthly average | report only (Mgal) | all year | 006 |
| Bypass Volume | daily maximum | report only (Mgal) | all year | 006 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | all year | 006 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | all year | 006 |
| Bypass valve | monthly average | report only (occur/mo) | all year | 006 |
| Bypass valve | daily maximum | report only (occur/mo) | all year | 006 |
| Bypass of treatment | monthly average | report only (hr/mo) | all year | 006 |
| Bypass of treatment | daily maximum | report only (hr/mo) | all year | 006 |
Cited limits by parameter: Ohio's rules and the federal ones.
Same industry: the 38 Coal Mining permits in Ohio.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/OH0022829 · MCP: https://passage-data.com/mcp