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Bituminous Coal - Underground, Freeport, Ohio. NPDES permit OH0140040 expired Aug 31, 2024; 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 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | Jun, Dec | 001 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | Jun, Dec | 001 |
| Calcium, total [as Ca] | monthly average | report only (mg/L) | Jun, Dec | 001 |
| Calcium, total [as Ca] | daily maximum | report only (mg/L) | Jun, Dec | 001 |
| Magnesium, total [as Mg] | monthly average | report only (mg/L) | Jun, Dec | 001 |
| Magnesium, total [as Mg] | daily maximum | report only (mg/L) | Jun, Dec | 001 |
| Sodium, total [as Na] | monthly average | report only (mg/L) | Jun, Dec | 001 |
| Sodium, total [as Na] | daily maximum | report only (mg/L) | Jun, Dec | 001 |
| Chloride [as Cl] | monthly average | report only (mg/L) | Jun, Dec | 001 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Jun, Dec | 001 |
| Sulfate, total [as SO4] | daily maximum | ≤ 1158 mg/L | Mar, Jun, Aug, Dec | 001 |
| Selenium, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 001 |
| Selenium, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 001 |
| Iron, total [as Fe] | monthly average | ≤ 3000 ug/L | all year | 001 |
| Iron, total [as Fe] | daily maximum | ≤ 6000 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 |
| Zinc, total recoverable | monthly average | report only (ug/L) | Jun, Dec | 001 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | Jun, Dec | 001 |
| Lead, total recoverable | monthly average | report only (ug/L) | Jun, Dec | 001 |
| Lead, total recoverable | daily maximum | report only (ug/L) | Jun, Dec | 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 |
| Rainfall | monthly average | report only (in) | all year | 001 |
| Rainfall | daily maximum | report only (in) | 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 |
| Mercury, total low level | monthly average | report only (ng/L) | Sep | 001 |
| Mercury, total low level | daily maximum | report only (ng/L) | Sep | 001 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | Mar, Jun, Aug, Dec | 001 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | Mar, Jun, Aug, Dec | 001 |
| Flow rate | monthly average | report only (gal/d) | all year | 002 |
| Flow rate | daily maximum | report only (gal/d) | all year | 002 |
| Color, spectrophoto-metric filter | monthly average | report only (severity) | all year | 002 |
| Color, spectrophoto-metric filter | daily maximum | report only (severity) | all year | 002 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 6 mg/L | Jun | 002 |
| Solids, total suspended | monthly average | ≤ 12 mg/L | Jun, Dec | 002 |
| Solids, total suspended | weekly maximum | ≤ 18 mg/L | Jun, Dec | 002 |
| Solids, total suspended | monthly average | ≤ .157 kg/d | Jun, Dec | 002 |
| Solids, total suspended | weekly maximum | ≤ .236 kg/d | Jun, Dec | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1 mg/L | Jun | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 3 mg/L | Dec | 002 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ 1.5 mg/L | Jun | 002 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ 4.5 mg/L | Dec | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .0131 kg/d | Jun | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .0393 kg/d | Dec | 002 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ .0197 kg/d | Jun | 002 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ .0589 kg/d | Dec | 002 |
| Odor, atmospheric [severity] | monthly average | report only (severity) | all year | 002 |
| Odor, atmospheric [severity] | daily maximum | report only (severity) | all year | 002 |
| Turbidity [severity] | monthly average | report only (severity) | all year | 002 |
| Turbidity [severity] | daily maximum | report only (severity) | all year | 002 |
| E. coli, MTEC-MF | monthly geometric mean | ≤ 126 MPN/100mL | Jun, Aug | 002 |
| E. coli, MTEC-MF | weekly geometric mean | ≤ 284 MPN/100mL | Jun, Aug | 002 |
| Chlorine, total residual | daily maximum | ≤ .019 mg/L | Jun, Aug | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 10 mg/L | Jun, Dec | 002 |
| BOD, carbonaceous [5 day, 20 C] | weekly maximum | ≤ 15 mg/L | Jun, Dec | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ .131 kg/d | Jun, Dec | 002 |
| BOD, carbonaceous [5 day, 20 C] | weekly maximum | ≤ .197 kg/d | Jun, Dec | 002 |
| Sludge waste from secondary clarifiers | monthly average | report only (gal) | Dec | 588 |
| Sludge waste from secondary clarifiers | daily maximum | report only (gal) | Dec | 588 |
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/OH0140040 · MCP: https://passage-data.com/mcp