Passage Data · Check a report · Use it from your AI
Bituminous Coal - Underground, major discharger, Grantsville, Maryland. NPDES permit MD0070629, in force until Aug 31, 2028. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Specific conductance | monthly average | report only (uS/cm) | all year | 001 |
| Specific conductance | daily maximum | report only (uS/cm) | all year | 001 |
| Sulfate [as S] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 001 |
| pH | maximum | ≤ 8.5 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 001 |
| Calcium, total [as Ca] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Magnesium, total [as Mg] | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 001 |
| Iron, total [as Fe] | monthly average | ≤ 1 mg/L | all year | 001 |
| Iron, total [as Fe] | daily maximum | ≤ 1 mg/L | all year | 001 |
| Manganese, total [as Mn] | monthly average | ≤ 2 mg/L | all year | 001 |
| Manganese, total [as Mn] | daily maximum | ≤ 4 mg/L | all year | 001 |
| Selenium, dissolved [as Se] | daily maximum | report only (ug/L) | all year | 001 |
| Selenium, total [as Se] | daily maximum | report only (ug/L) | all year | 001 |
| Temp. diff. between up/down stream deg. F | daily maximum | ≤ 0 deg F | May–Sep | 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 | ≤ 2.2 MGD | all year | 001 |
| Mercury, dissolved [as Hg] | daily maximum | report only (ug/L) | all year | 001 |
| Mercury, total [as Hg] | daily maximum | report only (ug/L) | all year | 001 |
| Toxicity, Acute | daily maximum | < 1 toxic | Dec | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 002 |
| pH | maximum | ≤ 8.5 SU | all year | 002 |
| Solids, total suspended | maximum monthly average | ≤ 30 mg/L | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 002 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 002 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 002 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 002 |
| Manganese, total [as Mn] | monthly average | ≤ 2 mg/L | all year | 002 |
| Manganese, total [as Mn] | daily maximum | ≤ 4 mg/L | all year | 002 |
| Temp. diff. between up/down stream deg. F | daily maximum | ≤ 0 deg F | May–Sep | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 002 |
| pH | minimum | ≥ 6.5 SU | all year | 003 |
| pH | maximum | ≤ 8.5 SU | all year | 003 |
| Solids, total suspended | maximum monthly average | ≤ 30 mg/L | all year | 003 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 003 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 003 |
| Iron, total [as Fe] | maximum monthly average | ≤ 3 mg/L | all year | 003 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 003 |
| Manganese, total [as Mn] | maximum monthly average | ≤ 2 mg/L | all year | 003 |
| Manganese, total [as Mn] | daily maximum | ≤ 4 mg/L | all year | 003 |
| Temp. diff. between up/down stream deg. F | daily maximum | ≤ 0 deg F | May–Sep | 003 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 003 |
| Specific conductance | monthly average | report only (uS/cm) | all year | 004 |
| Specific conductance | daily maximum | report only (uS/cm) | all year | 004 |
| Sulfate [as S] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 004 |
| pH | minimum | ≥ 6.5 SU | all year | 004 |
| pH | maximum | ≤ 8.5 SU | all year | 004 |
| Solids, total suspended | maximum monthly average | ≤ 30 mg/L | all year | 004 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 004 |
| Calcium, total [as Ca] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 004 |
| Magnesium, total [as Mg] | daily maximum | report only (ug/L) | Mar, Jun, Sep, Dec | 004 |
| Iron, total [as Fe] | monthly average | ≤ 1 mg/L | all year | 004 |
| Iron, total [as Fe] | daily maximum | ≤ 1 mg/L | all year | 004 |
| Manganese, total [as Mn] | monthly average | ≤ 2 mg/L | all year | 004 |
| Manganese, total [as Mn] | daily maximum | ≤ 4 mg/L | all year | 004 |
| Selenium, dissolved [as Se] | daily maximum | report only (ug/L) | all year | 004 |
| Selenium, total [as Se] | daily maximum | report only (ug/L) | all year | 004 |
| Temp. diff. between up/down stream deg. F | daily maximum | ≤ 0 deg F | May–Sep | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ 2.2 MGD | all year | 004 |
| Mercury, dissolved [as Hg] | daily maximum | report only (ug/L) | all year | 004 |
| Mercury, total [as Hg] | daily maximum | report only (ug/L) | all year | 004 |
| Toxicity, Acute | daily maximum | ≤ 1 tox acute | all year | 004 |
Cited limits by parameter: Maryland's rules and the federal ones.
Same industry: the 3 Coal Mining permits in Maryland.
· Save this facility as a site · Superfund sites nearby · Your permits on one board
On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/MD0070629 · MCP: https://passage-data.com/mcp