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Bituminous Coal - Underground, Oaktown, Indiana. NPDES permit ING040222, in force until Oct 31, 2028. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | daily minimum | ≥ 6 SU | all year | 002 |
| pH | daily maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | daily average | ≤ 35 mg/L | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 002 |
| Solids, settleable | daily average | report only (mL/L) | all year | 002 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 002 |
| Iron, total [as Fe] | daily average | ≤ 3 mg/L | all year | 002 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 002 |
| Duration | monthly total | report only (d/mo) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Precipitation volume | monthly total | report only (in/mo) | all year | 002 |
| pH | daily minimum | ≥ 6 SU | all year | 005 |
| pH | daily maximum | ≤ 9 SU | all year | 005 |
| Solids, total suspended | daily average | ≤ 35 mg/L | all year | 005 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 005 |
| Solids, settleable | daily average | report only (mL/L) | all year | 005 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 005 |
| Iron, total [as Fe] | daily average | ≤ 3 mg/L | all year | 005 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 005 |
| Duration | monthly total | report only (d/mo) | all year | 005 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 005 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 005 |
| Precipitation volume | monthly total | report only (in/mo) | all year | 005 |
| pH | daily minimum | ≥ 6 SU | all year | 006 |
| pH | daily maximum | ≤ 9 SU | all year | 006 |
| Solids, total suspended | daily average | ≤ 35 mg/L | all year | 006 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 006 |
| Solids, settleable | daily average | report only (mL/L) | all year | 006 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 006 |
| Iron, total [as Fe] | daily average | ≤ 3 mg/L | all year | 006 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 006 |
| Duration | monthly total | report only (d/mo) | all year | 006 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 006 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 006 |
| Precipitation volume | monthly total | report only (in/mo) | all year | 006 |
Cited limits by parameter: Indiana's rules and the federal ones.
Same industry: the 38 Coal Mining permits in Indiana.
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Your permit document is the final word. As JSON: /api/v1/permits/ING040222 · MCP: https://passage-data.com/mcp