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Industrial or other facility, Grantsville, Maryland. NPDES permit MD0072117 expired Aug 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 | minimum | ≥ 6.5 SU | all year | 001 |
| pH | maximum | ≤ 8.5 SU | all year | 001 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 001 |
| Manganese, total [as Mn] | maximum monthly average | ≤ 2 mg/L | all year | 001 |
| Manganese, total [as Mn] | daily maximum | ≤ 4 mg/L | all year | 001 |
| Suspended Solids, Total | maximum monthly average | ≤ 30 mg/L | all year | 001 |
| Suspended Solids, Total | daily maximum | ≤ 45 mg/L | all year | 001 |
| Temp. difference, summer [deg. F] | daily maximum | ≤ 0 deg F | May–Sep | 001 |
| Iron, total [as Fe] | maximum monthly average | ≤ 3 mg/L | all year | 001 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 001 |
| Flow | daily maximum | report only (MGD) | all year | 001 |
| Flow | monthly average | report only (MGD) | all year | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 002 |
| pH | daily maximum | ≤ 8.5 SU | all year | 002 |
| Solids, settleable | daily maximum | ≤ .5 mL/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 |
| Suspended Solids, Total | monthly average | ≤ 3 mg/L | all year | 002 |
| Suspended Solids, Total | daily maximum | ≤ 6 mg/L | all year | 002 |
| Temp. difference, summer [deg. F] | daily maximum | ≤ 0 deg F | May–Sep | 002 |
| Iron, total [as Fe] | maximum monthly average | ≤ 3 mg/L | all year | 002 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 002 |
| Flow | monthly average | report only (gal/d) | all year | 002 |
| Flow | daily median | report only (gal/d) | all year | 002 |
| pH | minimum | ≥ 6.5 SU | all year | 003 |
| pH | daily maximum | ≤ 8.5 SU | all year | 003 |
| Calcium, total [as Ca] | daily maximum | report only (mg/L) | all year | 003 |
| Calcium, total [as Ca] | daily maximum | report only (mg/L) | all year | 003 |
| Magnesium, total [as Mg] | daily maximum | report only (mg/L) | all year | 003 |
| Magnesium, total [as Mg] | daily maximum | report only (mg/L) | all year | 003 |
| Arsenic, dissolved [as As] | daily maximum | report only (ug/L) | all year | 003 |
| Arsenic, dissolved [as As] | daily maximum | report only (ug/L) | all year | 003 |
| Arsenic, total [as As] | daily maximum | report only (ug/L) | all year | 003 |
| Arsenic, total [as As] | daily maximum | report only (ug/L) | all year | 003 |
| Beryllium, dissolved [as Be] | daily maximum | report only (ug/L) | all year | 003 |
| Beryllium, dissolved [as Be] | daily maximum | report only (ug/L) | all year | 003 |
| Beryllium, total [as Be] | EPA's "DPD AVG" | report only (ug/L) | all year | 003 |
| Beryllium, total [as Be] | EPA's "DPD AVG" | report only (ug/L) | all year | 003 |
| Cadmium, dissolved [as Cd] | daily maximum | report only (ug/L) | all year | 003 |
| Cadmium, dissolved [as Cd] | daily maximum | report only (ug/L) | all year | 003 |
| Cadmium, total [as Cd] | daily maximum | report only (ug/L) | all year | 003 |
| Cadmium, total [as Cd] | daily maximum | report only (ug/L) | all year | 003 |
| Chromium, dissolved [as Cr] | daily maximum | report only (ug/L) | all year | 003 |
| Chromium, dissolved [as Cr] | daily maximum | report only (ug/L) | all year | 003 |
| Chromium, total [as Cr] | daily maximum | report only (ug/L) | all year | 003 |
| Chromium, total [as Cr] | daily maximum | report only (ug/L) | all year | 003 |
| Copper, dissolved [as Cu] | daily maximum | report only (ug/L) | all year | 003 |
| Copper, dissolved [as Cu] | daily maximum | report only (ug/L) | all year | 003 |
| Copper, total [as Cu] | daily maximum | report only (ug/L) | all year | 003 |
| Copper, total [as Cu] | daily maximum | report only (ug/L) | all year | 003 |
| Lead, dissolved [as Pb] | daily maximum | report only (ug/L) | all year | 003 |
| Lead, dissolved [as Pb] | daily maximum | report only (ug/L) | all year | 003 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 003 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 003 |
| Manganese, total [as Mn] | monthly average | ≤ 2 mg/L | all year | 003 |
| Manganese, total [as Mn] | daily maximum | ≤ 4 mg/L | all year | 003 |
| Thallium, dissolved [as Tl] | daily maximum | report only (ug/L) | all year | 003 |
| Thallium, dissolved [as Tl] | daily maximum | report only (ug/L) | all year | 003 |
| Thallium, total [as Tl] | daily maximum | report only (ug/L) | all year | 003 |
| Thallium, total [as Tl] | daily maximum | report only (ug/L) | all year | 003 |
| Nickel, dissolved [as Ni] | daily maximum | report only (ug/L) | all year | 003 |
| Nickel, dissolved [as Ni] | daily maximum | report only (ug/L) | all year | 003 |
| Nickel, total [as Ni] | daily maximum | report only (ug/L) | all year | 003 |
| Nickel, total [as Ni] | daily maximum | report only (ug/L) | all year | 003 |
| Silver, dissolved [as Ag] | daily maximum | report only (ug/L) | all year | 003 |
| Silver, dissolved [as Ag] | daily maximum | report only (ug/L) | all year | 003 |
| Silver, total [as Ag] | daily maximum | report only (ug/L) | all year | 003 |
| Silver, total [as Ag] | daily maximum | report only (ug/L) | all year | 003 |
| Zinc, dissolved [as Zn] | annual maximum | report only (ug/L) | all year | 003 |
| Zinc, dissolved [as Zn] | annual maximum | report only (ug/L) | all year | 003 |
| Zinc, total [as Zn] | daily maximum | report only (ug/L) | all year | 003 |
| Zinc, total [as Zn] | daily maximum | report only (ug/L) | all year | 003 |
| Antimony, dissolved [as Sb] | annual average | report only (ug/L) | all year | 003 |
| Antimony, dissolved [as Sb] | annual average | report only (ug/L) | all year | 003 |
| Antimony, total [as Sb] | annual average | report only (ug/L) | all year | 003 |
| Antimony, total [as Sb] | annual average | report only (ug/L) | all year | 003 |
| Aluminum, total [as Al] | annual average | report only (ug/L) | all year | 003 |
| Aluminum, total [as Al] | annual average | report only (ug/L) | all year | 003 |
| Aluminum, dissolved [as Al] | annual average | report only (ug/L) | all year | 003 |
| Aluminum, dissolved [as Al] | annual average | report only (ug/L) | all year | 003 |
| Selenium, dissolved [as Se] | daily maximum | report only (ug/L) | all year | 003 |
| Selenium, total [as Se] | daily maximum | report only (ug/L) | all year | 003 |
| Specific Conductance | monthly average | report only (umho/sec) | all year | 003 |
| Specific Conductance | daily maximum | report only (umho/sec) | all year | 003 |
| Suspended Solids, Total | maximum monthly average | ≤ 30 mg/L | all year | 003 |
| Suspended Solids, Total | maximum | ≤ 45 mg/L | all year | 003 |
| Sulfates, total [as SO4] | daily maximum | report only (mg/L) | all year | 003 |
| Sulfates, total [as SO4] | daily maximum | report only (mg/L) | all year | 003 |
| Temp. difference, winter [deg. F] | daily maximum | ≤ 0 deg F | all year | 003 |
| Mercury, dissolved [as Hg] | daily maximum | report only (ug/L) | all year | 003 |
| Mercury, total [as Hg] | daily maximum | report only (ug/L) | all year | 003 |
| Iron, total [as Fe] | maximum monthly average | ≤ 1 mg/L | all year | 003 |
| Iron, total [as Fe] | daily maximum | ≤ 1 mg/L | all year | 003 |
| Flow | per discharge | report only (MGD) | all year | 003 |
| Flow | monthly average | report only (MGD) | all year | 003 |
Cited limits by parameter: Maryland's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/MD0072117 · MCP: https://passage-data.com/mcp