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Mega Highwall Mining, LLC

Bituminous Coal And Lignite - Surface, Charleston, West Virginia. NPDES permit WV1008129, in force until Nov 30, 2030. Last 12 months: over a limit 8 times (last March 2026), 115 required values missing, 18 of 81 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 57 days after each period: outfall 002 form Q quarterly, outfall 004 form Q quarterly, outfall 005 form Q quarterly, outfall 006 form Q quarterly, outfall 007 form Q quarterly, outfall 032 form Q quarterly, and 3 more forms
Last report on file
June 2026
Oct 2024 – Sep 2025
45 values over a limit, 207 required values missing, 8 of 99 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingOutfallParameterReportedLimitOver by
December 2025006Aluminum, total [as Al], monthly average.776 mg/L≤ .43 mg/L80%
December 2025006Aluminum, total [as Al], monthly maximum1.17 mg/L≤ .75 mg/L56%
December 2025006Solids, total suspended, monthly maximum72 mg/L≤ 70 mg/L3%
January 2026006Aluminum, total [as Al], monthly average.728 mg/L≤ .43 mg/L69%
January 2026006Aluminum, total [as Al], monthly maximum1.05 mg/L≤ .75 mg/L40%
January 2026006Iron, total [as Fe], monthly average1.52 mg/L≤ 1.42 mg/L7%
March 2026005Iron, total [as Fe], monthly average1.86 mg/L≤ 1.42 mg/L31%
March 2026005Solids, total suspended, monthly average60 mg/L≤ 35 mg/L71%

Limits in force (262)

ParameterStatisticLimitMonthsOutfall
Flow ratemonthly averagereport only (gal/min)all year002
Flow ratemonthly maximumreport only (gal/min)all year002
Specific conductancemonthly minimumreport only (umho/cm)all year002
Specific conductancemonthly averagereport only (umho/cm)all year002
Specific conductancemonthly maximumreport only (umho/cm)all year002
pHmonthly minimum≥ 6 SUall year002
pHmonthly averagereport only (SU)all year002
pHmonthly maximum≤ 9 SUall year002
Solids, total suspendedmonthly minimumreport only (mg/L)all year002
Solids, total suspendedmonthly average≤ 35 mg/Lall year002
Solids, total suspendedmonthly maximum≤ 70 mg/Lall year002
Solids, settleablemonthly minimumreport only (mL/L)all year002
Solids, settleablemonthly averagereport only (mL/L)all year002
Solids, settleablemonthly maximum≤ .5 mL/Lall year002
Sulfate, total [as SO4]monthly minimumreport only (mg/L)all year002
Sulfate, total [as SO4]monthly averagereport only (mg/L)all year002
Sulfate, total [as SO4]monthly maximumreport only (mg/L)all year002
Iron, total [as Fe]monthly minimumreport only (mg/L)all year002
Iron, total [as Fe]monthly average≤ 1.42 mg/Lall year002
Iron, total [as Fe]monthly maximum≤ 2.46 mg/Lall year002
Manganese, total [as Mn]monthly minimumreport only (mg/L)all year002
Manganese, total [as Mn]monthly average≤ 2 mg/Lall year002
Manganese, total [as Mn]monthly maximum≤ 3.47 mg/Lall year002
Aluminum, total [as Al]monthly minimumreport only (mg/L)all year002
Aluminum, total [as Al]monthly average≤ .43 mg/Lall year002
Aluminum, total [as Al]monthly maximum≤ .75 mg/Lall year002
Aluminum, dissolved [as Al]monthly minimumreport only (mg/L)all year002
Aluminum, dissolved [as Al]monthly averagereport only (mg/L)all year002
Aluminum, dissolved [as Al]monthly maximumreport only (mg/L)all year002
Solids, total dissolvedmonthly minimumreport only (mg/L)all year002
Solids, total dissolvedmonthly averagereport only (mg/L)all year002
Solids, total dissolvedmonthly maximumreport only (mg/L)all year002
Flow ratemonthly averagereport only (gal/min)all year004
Flow ratemonthly maximumreport only (gal/min)all year004
Specific conductancemonthly minimumreport only (umho/cm)all year004
Specific conductancemonthly averagereport only (umho/cm)all year004
Specific conductancemonthly maximumreport only (umho/cm)all year004
pHmonthly minimum≥ 6 SUall year004
pHmonthly averagereport only (SU)all year004
pHmonthly maximum≤ 9 SUall year004
Solids, total suspendedmonthly minimumreport only (mg/L)all year004
Solids, total suspendedmonthly average≤ 35 mg/Lall year004
Solids, total suspendedmonthly maximum≤ 70 mg/Lall year004
Solids, settleablemonthly minimumreport only (mL/L)all year004
Solids, settleablemonthly averagereport only (mL/L)all year004
Solids, settleablemonthly maximum≤ .5 mL/Lall year004
Sulfate, total [as SO4]monthly minimumreport only (mg/L)all year004
Sulfate, total [as SO4]monthly averagereport only (mg/L)all year004
Sulfate, total [as SO4]monthly maximumreport only (mg/L)all year004
Iron, total [as Fe]monthly minimumreport only (mg/L)all year004
Iron, total [as Fe]monthly average≤ 1.42 mg/Lall year004
Iron, total [as Fe]monthly maximum≤ 2.46 mg/Lall year004
Manganese, total [as Mn]monthly minimumreport only (mg/L)all year004
Manganese, total [as Mn]monthly average≤ 2 mg/Lall year004
Manganese, total [as Mn]monthly maximum≤ 3.47 mg/Lall year004
Aluminum, total [as Al]monthly minimumreport only (mg/L)all year004
Aluminum, total [as Al]monthly average≤ .43 mg/Lall year004
Aluminum, total [as Al]monthly maximum≤ .75 mg/Lall year004
Aluminum, dissolved [as Al]monthly minimumreport only (mg/L)all year004
Aluminum, dissolved [as Al]monthly averagereport only (mg/L)all year004
Aluminum, dissolved [as Al]monthly maximumreport only (mg/L)all year004
Solids, total dissolvedmonthly minimumreport only (mg/L)all year004
Solids, total dissolvedmonthly averagereport only (mg/L)all year004
Solids, total dissolvedmonthly maximumreport only (mg/L)all year004
Flow ratemonthly averagereport only (gal/min)all year005
Flow ratemonthly maximumreport only (gal/min)all year005
Specific conductancemonthly minimumreport only (umho/cm)all year005
Specific conductancemonthly averagereport only (umho/cm)all year005
Specific conductancemonthly maximumreport only (umho/cm)all year005
pHmonthly minimum≥ 6 SUall year005
pHmonthly averagereport only (SU)all year005
pHmonthly maximum≤ 9 SUall year005
Solids, total suspendedmonthly minimumreport only (mg/L)all year005
Solids, total suspendedmonthly average≤ 35 mg/Lall year005
Solids, total suspendedmonthly maximum≤ 70 mg/Lall year005
Solids, settleablemonthly minimumreport only (mL/L)all year005
Solids, settleablemonthly averagereport only (mL/L)all year005
Solids, settleablemonthly maximum≤ .5 mL/Lall year005
Sulfate, total [as SO4]monthly minimumreport only (mg/L)all year005
Sulfate, total [as SO4]monthly averagereport only (mg/L)all year005
Sulfate, total [as SO4]monthly maximumreport only (mg/L)all year005
Iron, total [as Fe]monthly minimumreport only (mg/L)all year005
Iron, total [as Fe]monthly average≤ 1.42 mg/Lall year005
Iron, total [as Fe]monthly maximum≤ 2.46 mg/Lall year005
Manganese, total [as Mn]monthly minimumreport only (mg/L)all year005
Manganese, total [as Mn]monthly average≤ 2 mg/Lall year005
Manganese, total [as Mn]monthly maximum≤ 3.47 mg/Lall year005
Aluminum, total [as Al]monthly minimumreport only (mg/L)all year005
Aluminum, total [as Al]monthly average≤ 3 mg/Lall year005
Aluminum, total [as Al]monthly maximum≤ 6 mg/Lall year005
Aluminum, dissolved [as Al]monthly minimumreport only (mg/L)all year005
Aluminum, dissolved [as Al]monthly averagereport only (mg/L)all year005
Aluminum, dissolved [as Al]monthly maximumreport only (mg/L)all year005
Solids, total dissolvedmonthly minimumreport only (mg/L)all year005
Solids, total dissolvedmonthly averagereport only (mg/L)all year005
Solids, total dissolvedmonthly maximumreport only (mg/L)all year005
Flow ratemonthly averagereport only (gal/min)all year006
Flow ratemonthly maximumreport only (gal/min)all year006
Specific conductancemonthly minimumreport only (umho/cm)all year006
Specific conductancemonthly averagereport only (umho/cm)all year006
Specific conductancemonthly maximumreport only (umho/cm)all year006
pHmonthly minimum≥ 6 SUall year006
pHmonthly averagereport only (SU)all year006
pHmonthly maximum≤ 9 SUall year006
Solids, total suspendedmonthly minimumreport only (mg/L)all year006
Solids, total suspendedmonthly average≤ 35 mg/Lall year006
Solids, total suspendedmonthly maximum≤ 70 mg/Lall year006
Solids, settleablemonthly minimumreport only (mL/L)all year006
Solids, settleablemonthly averagereport only (mL/L)all year006
Solids, settleablemonthly maximum≤ .5 mL/Lall year006
Sulfate, total [as SO4]monthly minimumreport only (mg/L)all year006
Sulfate, total [as SO4]monthly averagereport only (mg/L)all year006
Sulfate, total [as SO4]monthly maximumreport only (mg/L)all year006
Iron, total [as Fe]monthly minimumreport only (mg/L)all year006
Iron, total [as Fe]monthly average≤ 1.42 mg/Lall year006
Iron, total [as Fe]monthly maximum≤ 2.46 mg/Lall year006
Manganese, total [as Mn]monthly minimumreport only (mg/L)all year006
Manganese, total [as Mn]monthly average≤ 2 mg/Lall year006
Manganese, total [as Mn]monthly maximum≤ 3.47 mg/Lall year006
Aluminum, total [as Al]monthly minimumreport only (mg/L)all year006
Aluminum, total [as Al]monthly average≤ .43 mg/Lall year006
Aluminum, total [as Al]monthly maximum≤ .75 mg/Lall year006
Aluminum, dissolved [as Al]monthly minimumreport only (mg/L)all year006
Aluminum, dissolved [as Al]monthly averagereport only (mg/L)all year006
Aluminum, dissolved [as Al]monthly maximumreport only (mg/L)all year006
Solids, total dissolvedmonthly minimumreport only (mg/L)all year006
Solids, total dissolvedmonthly averagereport only (mg/L)all year006
Solids, total dissolvedmonthly maximumreport only (mg/L)all year006
Flow ratemonthly averagereport only (gal/min)all year007
Flow ratemonthly maximumreport only (gal/min)all year007
Specific conductancemonthly minimumreport only (umho/cm)all year007
Specific conductancemonthly averagereport only (umho/cm)all year007
Specific conductancemonthly maximumreport only (umho/cm)all year007
pHmonthly minimum≥ 6 SUall year007
pHmonthly averagereport only (SU)all year007
pHmonthly maximum≤ 9 SUall year007
Solids, total suspendedmonthly minimumreport only (mg/L)all year007
Solids, total suspendedmonthly average≤ 35 mg/Lall year007
Solids, total suspendedmonthly maximum≤ 70 mg/Lall year007
Solids, settleablemonthly minimumreport only (mL/L)all year007
Solids, settleablemonthly averagereport only (mL/L)all year007
Solids, settleablemonthly maximum≤ .5 mL/Lall year007
Sulfate, total [as SO4]monthly minimumreport only (mg/L)all year007
Sulfate, total [as SO4]monthly averagereport only (mg/L)all year007
Sulfate, total [as SO4]monthly maximumreport only (mg/L)all year007
Iron, total [as Fe]monthly minimumreport only (mg/L)all year007
Iron, total [as Fe]monthly average≤ 1.42 mg/Lall year007
Iron, total [as Fe]monthly maximum≤ 2.46 mg/Lall year007
Manganese, total [as Mn]monthly minimumreport only (mg/L)all year007
Manganese, total [as Mn]monthly average≤ 2 mg/Lall year007
Manganese, total [as Mn]monthly maximum≤ 3.47 mg/Lall year007
Aluminum, total [as Al]monthly minimumreport only (mg/L)all year007
Aluminum, total [as Al]monthly average≤ .43 mg/Lall year007
Aluminum, total [as Al]monthly maximum≤ .75 mg/Lall year007
Aluminum, dissolved [as Al]monthly minimumreport only (mg/L)all year007
Aluminum, dissolved [as Al]monthly averagereport only (mg/L)all year007
Aluminum, dissolved [as Al]monthly maximumreport only (mg/L)all year007
Solids, total dissolvedmonthly minimumreport only (mg/L)all year007
Solids, total dissolvedmonthly averagereport only (mg/L)all year007
Solids, total dissolvedmonthly maximumreport only (mg/L)all year007
Flow ratemonthly averagereport only (gal/min)all year032
Flow ratemonthly maximumreport only (gal/min)all year032
Specific conductancemonthly minimumreport only (umho/cm)all year032
Specific conductancemonthly averagereport only (umho/cm)all year032
Specific conductancemonthly maximumreport only (umho/cm)all year032
pHmonthly minimum≥ 6 SUall year032
pHmonthly averagereport only (SU)all year032
pHmonthly maximum≤ 9 SUall year032
Solids, total suspendedmonthly minimumreport only (mg/L)all year032
Solids, total suspendedmonthly average≤ 35 mg/Lall year032
Solids, total suspendedmonthly maximum≤ 70 mg/Lall year032
Solids, settleablemonthly maximum≤ .5 mL/Lall year032
Sulfate, total [as SO4]monthly minimumreport only (mg/L)all year032
Sulfate, total [as SO4]monthly averagereport only (mg/L)all year032
Sulfate, total [as SO4]monthly maximumreport only (mg/L)all year032
Iron, total [as Fe]monthly minimumreport only (mg/L)all year032
Iron, total [as Fe]monthly average≤ 1.42 mg/Lall year032
Iron, total [as Fe]monthly maximum≤ 2.46 mg/Lall year032
Manganese, total [as Mn]monthly minimumreport only (mg/L)all year032
Manganese, total [as Mn]monthly average≤ 2 mg/Lall year032
Manganese, total [as Mn]monthly maximum≤ 3.47 mg/Lall year032
Aluminum, total [as Al]monthly minimumreport only (mg/L)all year032
Aluminum, total [as Al]monthly average≤ .43 mg/Lall year032
Aluminum, total [as Al]monthly maximum≤ .75 mg/Lall year032
Aluminum, dissolved [as Al]monthly minimumreport only (mg/L)all year032
Aluminum, dissolved [as Al]monthly averagereport only (mg/L)all year032
Aluminum, dissolved [as Al]monthly maximumreport only (mg/L)all year032
Solids, total dissolvedmonthly minimumreport only (mg/L)all year032
Solids, total dissolvedmonthly averagereport only (mg/L)all year032
Solids, total dissolvedmonthly maximumreport only (mg/L)all year032
Flow ratemonthly averagereport only (gal/min)all year033
Flow ratemonthly maximumreport only (gal/min)all year033
Specific conductancemonthly minimumreport only (umho/cm)all year033
Specific conductancemonthly averagereport only (umho/cm)all year033
Specific conductancemonthly maximumreport only (umho/cm)all year033
pHmonthly minimum≥ 6 SUall year033
pHmonthly maximum≤ 9 SUall year033
Solids, total suspendedmonthly minimumreport only (mg/L)all year033
Solids, total suspendedmonthly average≤ 35 mg/Lall year033
Solids, total suspendedmonthly maximum≤ 70 mg/Lall year033
Solids, settleablemonthly maximum≤ .5 mL/Lall year033
Sulfate, total [as SO4]monthly minimumreport only (mg/L)all year033
Sulfate, total [as SO4]monthly averagereport only (mg/L)all year033
Sulfate, total [as SO4]monthly maximumreport only (mg/L)all year033
Iron, total [as Fe]monthly minimumreport only (mg/L)all year033
Iron, total [as Fe]monthly average≤ 1.42 mg/Lall year033
Iron, total [as Fe]monthly maximum≤ 2.46 mg/Lall year033
Manganese, total [as Mn]monthly minimumreport only (mg/L)all year033
Manganese, total [as Mn]monthly average≤ 2 mg/Lall year033
Manganese, total [as Mn]monthly maximum≤ 4 mg/Lall year033
Aluminum, total [as Al]monthly minimumreport only (mg/L)all year033
Aluminum, total [as Al]monthly average≤ 3 mg/Lall year033
Aluminum, total [as Al]monthly maximum≤ 6 mg/Lall year033
Aluminum, dissolved [as Al]monthly minimumreport only (mg/L)all year033
Aluminum, dissolved [as Al]monthly averagereport only (mg/L)all year033
Aluminum, dissolved [as Al]monthly maximumreport only (mg/L)all year033
Solids, total dissolvedmonthly minimumreport only (mg/L)all year033
Solids, total dissolvedmonthly averagereport only (mg/L)all year033
Solids, total dissolvedmonthly maximumreport only (mg/L)all year033
Stream flow, instantaneousmonthly averagereport only (cfs)all yearDSAC
Stream flow, instantaneousmonthly maximumreport only (cfs)all yearDSAC
Specific conductancemonthly averagereport only (umho/cm)all yearDSAC
Specific conductancemonthly maximumreport only (umho/cm)all yearDSAC
pHmonthly minimumreport only (SU)all yearDSAC
pHmonthly maximumreport only (SU)all yearDSAC
Sulfate, total [as SO4]monthly averagereport only (mg/L)all yearDSAC
Sulfate, total [as SO4]monthly maximumreport only (mg/L)all yearDSAC
Iron, total [as Fe]monthly averagereport only (mg/L)all yearDSAC
Iron, total [as Fe]monthly maximumreport only (mg/L)all yearDSAC
Manganese, total [as Mn]monthly minimumreport only (mg/L)all yearDSAC
Manganese, total [as Mn]monthly averagereport only (mg/L)all yearDSAC
Manganese, total [as Mn]monthly maximumreport only (mg/L)all yearDSAC
Aluminum, total [as Al]monthly minimumreport only (mg/L)all yearDSAC
Aluminum, total [as Al]monthly averagereport only (mg/L)all yearDSAC
Aluminum, total [as Al]monthly maximumreport only (mg/L)all yearDSAC
Aluminum, dissolved [as Al]monthly minimumreport only (mg/L)all yearDSAC
Aluminum, dissolved [as Al]monthly averagereport only (mg/L)all yearDSAC
Aluminum, dissolved [as Al]monthly maximumreport only (mg/L)all yearDSAC
Solids, total dissolvedmonthly averagereport only (mg/L)all yearDSAC
Solids, total dissolvedmonthly maximumreport only (mg/L)all yearDSAC
Stream flow, instantaneousmonthly averagereport only (cfs)all yearUSAC
Stream flow, instantaneousmonthly maximumreport only (cfs)all yearUSAC
Specific conductancemonthly averagereport only (umho/cm)all yearUSAC
Specific conductancemonthly maximumreport only (umho/cm)all yearUSAC
pHmonthly minimumreport only (SU)all yearUSAC
pHmonthly maximumreport only (SU)all yearUSAC
Sulfate, total [as SO4]monthly averagereport only (mg/L)all yearUSAC
Sulfate, total [as SO4]monthly maximumreport only (mg/L)all yearUSAC
Iron, total [as Fe]monthly minimumreport only (mg/L)all yearUSAC
Iron, total [as Fe]monthly averagereport only (mg/L)all yearUSAC
Iron, total [as Fe]monthly maximumreport only (mg/L)all yearUSAC
Manganese, total [as Mn]monthly minimumreport only (mg/L)all yearUSAC
Manganese, total [as Mn]monthly averagereport only (mg/L)all yearUSAC
Manganese, total [as Mn]monthly maximumreport only (mg/L)all yearUSAC
Aluminum, total [as Al]monthly minimumreport only (mg/L)all yearUSAC
Aluminum, total [as Al]monthly averagereport only (mg/L)all yearUSAC
Aluminum, total [as Al]monthly maximumreport only (mg/L)all yearUSAC
Aluminum, dissolved [as Al]monthly minimumreport only (mg/L)all yearUSAC
Aluminum, dissolved [as Al]monthly averagereport only (mg/L)all yearUSAC
Aluminum, dissolved [as Al]monthly maximumreport only (mg/L)all yearUSAC
Solids, total dissolvedmonthly averagereport only (mg/L)all yearUSAC
Solids, total dissolvedmonthly maximumreport only (mg/L)all yearUSAC

How strict are these limits?

Cited limits by parameter: West Virginia's rules and the federal ones.

Same industry: the 1,301 Coal Mining permits in West Virginia.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/WV1008129 · MCP: https://passage-data.com/mcp