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Bituminous Coal And Lignite - Surface, major discharger, Deer Park, Maryland. NPDES permit MD0055182 expired Sep 30, 2026; its limits still apply. Last 12 months: over a limit 5 times (last July 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Outfall | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|---|
| February 2026 | 009 | Iron, total [as Fe], maximum monthly average | 4.01 mg/L | ≤ 3 mg/L | 34% |
| February 2026 | 009 | Iron, total [as Fe], maximum daily average | 7.83 mg/L | ≤ 6 mg/L | 31% |
| June 2026 | 002 | Manganese, total [as Mn], maximum monthly average | 2.06 mg/L | ≤ 2 mg/L | 3% |
| July 2026 | 002 | Manganese, total [as Mn], maximum monthly average | 2.9 mg/L | ≤ 2 mg/L | 45% |
| July 2026 | 002 | Manganese, total [as Mn], maximum daily average | 4.65 mg/L | ≤ 4 mg/L | 16% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 001 |
| Sulfate [as S] | monthly average | report only (mg/L) | all year | 002 |
| Sulfate [as S] | daily maximum | report only (mg/L) | all year | 002 |
| pH | minimum | ≥ 6.5 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | maximum monthly average | ≤ 30 mg/L | all year | 002 |
| Solids, total suspended | maximum daily average | ≤ 45 mg/L | all year | 002 |
| Solids, total suspended | monthly average | report only (lb/mo) | all year | 002 |
| Solids, total suspended | annual maximum | ≤ 621000 lb/yr | all year | 002 |
| Chloride [as Cl] | maximum monthly average | ≤ 230 mg/L | all year | 002 |
| Chloride [as Cl] | maximum monthly average | ≤ 230 mg/L | all year | 002 |
| Chloride [as Cl] | maximum daily average | ≤ 860 mg/L | all year | 002 |
| Chloride [as Cl] | maximum daily average | ≤ 860 mg/L | all year | 002 |
| Iron, total [as Fe] | maximum monthly average | ≤ 1 mg/L | all year | 002 |
| Iron, total [as Fe] | maximum daily average | ≤ 2.5 mg/L | all year | 002 |
| Manganese, total [as Mn] | maximum monthly average | ≤ 2 mg/L | all year | 002 |
| Manganese, total [as Mn] | maximum daily average | ≤ 4 mg/L | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Specific Conductance | monthly average | report only (umho/sec) | all year | 002 |
| Specific Conductance | daily maximum | report only (umho/sec) | all year | 002 |
| Solids, total dissolved [TDS] | monthly average | report only (mg/L) | all year | 002 |
| Solids, total dissolved [TDS] | daily maximum | report only (mg/L) | all year | 002 |
| Bromide [as Br] | monthly average | report only (mg/L) | all year | 002 |
| Bromide [as Br] | monthly average | report only (mg/L) | all year | 002 |
| Bromide [as Br] | daily maximum | report only (mg/L) | all year | 002 |
| Bromide [as Br] | daily maximum | report only (mg/L) | all year | 002 |
| Sulfate | monthly average | report only (mg/L) | all year | 002 |
| Sulfate | daily maximum | report only (mg/L) | all year | 002 |
| pH | minimum | ≥ 6 SU | all year | 005 |
| pH | maximum | ≤ 9 SU | all year | 005 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 005 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 005 |
| pH | minimum | ≥ 6 SU | all year | 006 |
| pH | maximum | ≤ 9 SU | all year | 006 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 006 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 006 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | Jun–Sep | 007 |
| pH | minimum | ≥ 6 SU | all year | 007 |
| pH | maximum | ≤ 9 SU | all year | 007 |
| pH | minimum | ≥ 6.5 SU | all year | 007 |
| pH | maximum | ≤ 10 SU | all year | 007 |
| Solids, settleable | maximum daily average | ≤ .5 mL/L | all year | 007 |
| Iron, total [as Fe] | maximum monthly average | ≤ 3 mg/L | all year | 007 |
| Iron, total [as Fe] | maximum daily average | ≤ 6 mg/L | all year | 007 |
| Manganese, total [as Mn] | maximum monthly average | ≤ 2 mg/L | all year | 007 |
| Manganese, total [as Mn] | maximum daily average | ≤ 4 mg/L | all year | 007 |
| Chloride | monthly average | report only (mg/L) | all year | 007 |
| Chloride | daily maximum | report only (mg/L) | all year | 007 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 007 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 007 |
| Solids, total dissolved | monthly average | report only (mg/L) | all year | 007 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 007 |
| Bromide [as Br] | monthly average | report only (mg/L) | all year | 007 |
| Bromide [as Br] | daily maximum | report only (mg/L) | all year | 007 |
| Sulfate | monthly average | report only (mg/L) | all year | 007 |
| Sulfate | daily maximum | report only (mg/L) | all year | 007 |
| pH | minimum | ≥ 6 SU | all year | 008 |
| pH | maximum | ≤ 9 SU | all year | 008 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 008 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 008 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 009 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 009 |
| pH | minimum | ≥ 6.5 SU | all year | 009 |
| pH | maximum | ≤ 9 SU | all year | 009 |
| pH | minimum | ≥ 6.5 SU | all year | 009 |
| pH | maximum | ≤ 10 SU | all year | 009 |
| Solids, total suspended | maximum monthly average | ≤ 30 mg/L | all year | 009 |
| Solids, total suspended | maximum daily average | ≤ 45 mg/L | all year | 009 |
| Solids, total suspended | monthly average | report only (lb/mo) | all year | 009 |
| Solids, settleable | maximum daily average | ≤ .5 mL/L | all year | 009 |
| Iron, total [as Fe] | maximum monthly average | ≤ 3 mg/L | all year | 009 |
| Iron, total [as Fe] | maximum daily average | ≤ 6 mg/L | all year | 009 |
| Manganese, total [as Mn] | maximum monthly average | ≤ 2 mg/L | all year | 009 |
| Manganese, total [as Mn] | maximum daily average | ≤ 4 mg/L | all year | 009 |
| Chloride | monthly average | report only (mg/L) | all year | 009 |
| Chloride | daily maximum | report only (mg/L) | all year | 009 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 009 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 009 |
| Solids, total dissolved | monthly average | report only (mg/L) | all year | 009 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 009 |
| Bromide [as Br] | monthly average | report only (mg/L) | all year | 009 |
| Bromide [as Br] | daily maximum | report only (mg/L) | all year | 009 |
| Sulfate | monthly average | report only (mg/L) | all year | 009 |
| Sulfate | daily maximum | report only (mg/L) | all year | 009 |
| pH | minimum | ≥ 6 SU | all year | 010 |
| pH | maximum | ≤ 9 SU | all year | 010 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 010 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 010 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | Jun–Sep | 012 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | Jun–Sep | 012 |
| pH | minimum | ≥ 6 SU | all year | 012 |
| pH | maximum | ≤ 9 SU | all year | 012 |
| pH | minimum | ≥ 6 SU | all year | 012 |
| pH | maximum | ≤ 10 SU | all year | 012 |
| Solids, total suspended | maximum monthly average | ≤ 30 mg/L | all year | 012 |
| Solids, total suspended | maximum daily average | ≤ 45 mg/L | all year | 012 |
| Solids, total suspended | monthly load | report only (lb/mo) | all year | 012 |
| Solids, settleable | monthly average minimum | ≥ .5 mL/L | all year | 012 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 012 |
| Iron, total [as Fe] | maximum monthly average | ≤ 3 mg/L | all year | 012 |
| Iron, total [as Fe] | maximum daily average | ≤ 6 mg/L | all year | 012 |
| Manganese, total [as Mn] | maximum monthly average | ≤ 2 mg/L | all year | 012 |
| Manganese, total [as Mn] | maximum daily average | ≤ 4 mg/L | all year | 012 |
| Chloride | monthly average | report only (mg/L) | all year | 012 |
| Chloride | daily maximum | report only (mg/L) | all year | 012 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 012 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 012 |
| Solids, total dissolved | monthly average | report only (mg/L) | all year | 012 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 012 |
| Bromide [as Br] | monthly average | report only (mg/L) | all year | 012 |
| Bromide [as Br] | daily maximum | report only (mg/L) | all year | 012 |
| Sulfate | monthly average | report only (mg/L) | all year | 012 |
| Sulfate | daily maximum | report only (mg/L) | all year | 012 |
| Sulfate [as S] | monthly average | report only (mg/L) | all year | 013 |
| Sulfate [as S] | daily maximum | report only (mg/L) | all year | 013 |
| pH | minimum | ≥ 6.5 SU | all year | 013 |
| pH | daily maximum | ≤ 9 SU | all year | 013 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 013 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 013 |
| Solids, total suspended | monthly load | report only (lb/mo) | all year | 013 |
| Solids, settleable | daily maximum | ≤ .5 mL/L | all year | 013 |
| Chloride [as Cl] | monthly average | report only (mg/L) | all year | 013 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 013 |
| Iron, total [as Fe] | monthly average | ≤ 3 mg/L | all year | 013 |
| Iron, total [as Fe] | daily maximum | ≤ 6 mg/L | all year | 013 |
| Manganese, total [as Mn] | monthly average | ≤ 2 mg/L | all year | 013 |
| Manganese, total [as Mn] | daily maximum | < 4 mg/L | all year | 013 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 013 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 013 |
| Temperature Increase Deg. F | monthly average | report only (deg F) | all year | 013 |
| Temperature Increase Deg. F | daily maximum | report only (deg F) | all year | 013 |
| Solids, total dissolved | monthly average | report only (mg/L) | all year | 013 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 013 |
| Bromide [as Br] | monthly average | report only (mg/L) | all year | 013 |
| Bromide [as Br] | daily maximum | report only (mg/L) | all year | 013 |
| Sulfate [as S] | monthly average | report only (mg/L) | all year | 014 |
| Sulfate [as S] | daily maximum | report only (mg/L) | all year | 014 |
| pH | minimum | ≥ 6.5 SU | all year | 014 |
| pH | maximum | ≤ 9 SU | all year | 014 |
| Solids, total suspended | maximum monthly average | ≤ 30 mg/L | all year | 014 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 014 |
| Solids, total suspended | monthly total | report only (lb/mo) | all year | 014 |
| Solids, total suspended | daily maximum | ≤ 621000 lb/yr | all year | 014 |
| Chloride [as Cl] | maximum monthly average | ≤ 230 mg/L | all year | 014 |
| Chloride [as Cl] | daily maximum | ≤ 860 mg/L | all year | 014 |
| Iron, total [as Fe] | maximum monthly average | ≤ 1 mg/L | all year | 014 |
| Iron, total [as Fe] | daily maximum | ≤ 2.5 mg/L | all year | 014 |
| Manganese, total [as Mn] | maximum monthly average | ≤ 2 mg/L | all year | 014 |
| Manganese, total [as Mn] | daily maximum | ≤ 4 mg/L | all year | 014 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 014 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 014 |
| Specific Conductance | monthly average | report only (umho/sec) | all year | 014 |
| Specific Conductance | daily maximum | report only (umho/sec) | all year | 014 |
| Solids, total dissolved [TDS] | monthly average | report only (mg/L) | all year | 014 |
| Solids, total dissolved [TDS] | daily maximum | report only (mg/L) | all year | 014 |
| Bromide [as Br] | monthly average | report only (mg/L) | all year | 014 |
| Bromide [as Br] | daily maximum | report only (mg/L) | all year | 014 |
| Sulfate [as S] | annual average | report only (mg/L) | all year | DW3 |
| pH | annual average | report only (SU) | all year | DW3 |
| Beryllium, total [as Be] | annual average | ≤ .004 mg/L | all year | DW3 |
| Beryllium, total [as Be] | daily maximum | report only (mg/L) | all year | DW3 |
| Cadmium, total [as Cd] | annual average | ≤ .005 mg/L | all year | DW3 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year | DW3 |
| Chromium, total [as Cr] | annual average | < .1 mg/L | all year | DW3 |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | all year | DW3 |
| Manganese, total [as Mn] | annual average | report only (mg/L) | all year | DW3 |
| Nickel, total [as Ni] | annual average | report only (mg/L) | all year | DW3 |
| Aluminum, total [as Al] | annual average | report only (mg/L) | all year | DW3 |
| Selenium, total [as Se] | annual average | ≤ .5 mg/L | all year | DW3 |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year | DW3 |
| Arsenic | annual average | ≤ .01 mg/L | all year | DW3 |
| Arsenic | daily maximum | report only (mg/L) | all year | DW3 |
| Chloride | annual average | report only (mg/L) | all year | DW3 |
| Solids, total dissolved | annual average | report only (mg/L) | all year | DW3 |
| Iron, total [as Fe] | annual average | report only (mg/L) | all year | DW3 |
| Flow | monthly average | report only (MGD) | all year | DW3 |
| Flow | daily maximum | report only (MGD) | all year | DW3 |
| Calcium, total [as Ca] | daily maximum | report only (mg/L) | all year | MDS7 |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | all year | MDS7 |
| Manganese, total [as Mn] | daily maximum | report only (mg/L) | all year | MDS7 |
| Aluminum, total [as Al] | daily maximum | report only (mg/L) | all year | MDS7 |
| Solids, total, percent | daily maximum | report only (%) | all year | MDS7 |
| Flow | monthly average | report only (MGD) | all year | MDS7 |
| Flow | daily maximum | report only (MGD) | all year | MDS7 |
| Calcium, total [as Ca] | daily maximum | report only (mg/L) | all year | MDS8 |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | all year | MDS8 |
| Manganese, total [as Mn] | daily maximum | report only (mg/L) | all year | MDS8 |
| Aluminum, total [as Al] | daily maximum | report only (mg/L) | all year | MDS8 |
| Solids, total, percent | daily maximum | report only (%) | all year | MDS8 |
| Flow | monthly average | report only (MGD) | all year | MDS8 |
| Flow | daily maximum | report only (MGD) | all year | MDS8 |
Cited limits by parameter: Maryland's rules and the federal ones.
Same industry: the 3 Coal Mining permits in Maryland.
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Your permit document is the final word. As JSON: /api/v1/permits/MD0055182 · MCP: https://passage-data.com/mcp