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Mepco, LLC

Coal And Other Minerals And Ores, Maidsville, West Virginia. NPDES permit WV0117901, in force until Sep 6, 2027. Last 12 months: over a limit 35 times (last August 2026), 22 required values missing, 2 of 16 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: form A monthly (20 values), form B quarterly (10 values), form C twice a year
Renewal application due
Mar 10, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
28 values over a limit, 66 required values missing, 2 of 18 reports late

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

All 35 values over a limit
Period endingParameterReportedLimitOver by
October 2025Aluminum, total recoverable, monthly average.44 mg/L≤ .374 mg/L18%
October 2025Cadmium, total recoverable, monthly average.0007 mg/L≤ .0005 mg/L40%
October 2025Cobalt, total recoverable, daily maximum.05 mg/L≤ .0016 mg/L3025%
October 2025Cobalt, total recoverable, monthly average.05 mg/L≤ .0008 mg/L6150%
October 2025Nickel, total recoverable, monthly average.152 mg/L≤ .104 mg/L46%
November 2025Aluminum, total recoverable, daily maximum.93 mg/L≤ .75 mg/L24%
November 2025Aluminum, total recoverable, monthly average.93 mg/L≤ .374 mg/L149%
November 2025Cobalt, total recoverable, daily maximum.006 mg/L≤ .0016 mg/L275%
November 2025Cobalt, total recoverable, monthly average.006 mg/L≤ .0008 mg/L650%
December 2025Aluminum, total recoverable, daily maximum.76 mg/L≤ .75 mg/L1%
December 2025Aluminum, total recoverable, monthly average.76 mg/L≤ .374 mg/L103%
December 2025Cobalt, total recoverable, daily maximum.007 mg/L≤ .0016 mg/L338%
December 2025Cobalt, total recoverable, monthly average.007 mg/L≤ .0008 mg/L775%
January 2026Cobalt, total recoverable, daily maximum.03 mg/L≤ .0016 mg/L1775%
January 2026Cobalt, total recoverable, monthly average.03 mg/L≤ .0008 mg/L3650%
February 2026Aluminum, total recoverable, monthly average.44 mg/L≤ .374 mg/L18%
February 2026Cobalt, total recoverable, daily maximum.004 mg/L≤ .0016 mg/L150%
February 2026Cobalt, total recoverable, monthly average.004 mg/L≤ .0008 mg/L400%
March 2026Cadmium, total recoverable, monthly average.0006 mg/L≤ .0005 mg/L20%
March 2026Cobalt, total recoverable, daily maximum.0423 mg/L≤ .0016 mg/L2544%
March 2026Cobalt, total recoverable, monthly average.0423 mg/L≤ .0008 mg/L5188%
March 2026Nickel, total recoverable, monthly average.12 mg/L≤ .104 mg/L15%
April 2026Aluminum, total recoverable, daily maximum4.48 mg/L≤ .75 mg/L497%
April 2026Aluminum, total recoverable, monthly average4.48 mg/L≤ .374 mg/L1098%
April 2026Cobalt, total recoverable, daily maximum.02 mg/L≤ .0016 mg/L1150%
April 2026Cobalt, total recoverable, monthly average.02 mg/L≤ .0008 mg/L2400%
May 2026Aluminum, total recoverable, daily maximum2.48 mg/L≤ .75 mg/L231%
May 2026Aluminum, total recoverable, monthly average2.48 mg/L≤ .374 mg/L563%
June 2026Aluminum, total recoverable, monthly average.45 mg/L≤ .374 mg/L20%
June 2026Cobalt, total recoverable, daily maximum.002 mg/L≤ .0016 mg/L25%
June 2026Cobalt, total recoverable, monthly average.002 mg/L≤ .0008 mg/L150%
July 2026Aluminum, total recoverable, daily maximum2.86 mg/L≤ .75 mg/L281%
July 2026Aluminum, total recoverable, monthly average2.86 mg/L≤ .374 mg/L665%
August 2026Aluminum, total recoverable, daily maximum1.43 mg/L≤ .75 mg/L91%
August 2026Aluminum, total recoverable, monthly average1.43 mg/L≤ .374 mg/L282%

Limits in force (34)

ParameterStatisticLimitMonths
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous maximum≤ 9 SUall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Hardness, total [as CaCO3]monthly averagereport only (mg/L)all year
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year
Arsenic, total recoverablemonthly averagereport only (mg/L)all year
Arsenic, total recoverabledaily maximumreport only (mg/L)all year
Cobalt, total recoverablemonthly average≤ .0008 mg/Lall year
Cobalt, total recoverabledaily maximum≤ .0016 mg/Lall year
Iron, total recoverablemonthly average≤ 1.23 mg/Lall year
Iron, total recoverabledaily maximum≤ 2.19 mg/Lall year
Selenium, total recoverablemonthly averagereport only (mg/L)all year
Selenium, total recoverabledaily maximumreport only (mg/L)all year
Beryllium, total recoverable [as Be]monthly averagereport only (mg/L)all year
Beryllium, total recoverable [as Be]daily maximumreport only (mg/L)all year
Chromium, hexavalent [as Cr]monthly averagereport only (mg/L)all year
Chromium, hexavalent [as Cr]daily maximumreport only (mg/L)all year
Nickel, total recoverablemonthly average≤ .104 mg/Lall year
Nickel, total recoverabledaily maximum≤ .209 mg/Lall year
Zinc, total recoverablemonthly average≤ .146 mg/Lall year
Zinc, total recoverabledaily maximum≤ .293 mg/Lall year
Aluminum, total recoverablemonthly average≤ .374 mg/Lall year
Aluminum, total recoverabledaily maximum≤ .75 mg/Lall year
Cadmium, total recoverablemonthly average≤ .0005 mg/Lall year
Cadmium, total recoverabledaily maximum≤ .001 mg/Lall year
Copper, total recoverablemonthly averagereport only (mg/L)all year
Copper, total recoverabledaily maximumreport only (mg/L)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Toxicity [chronic], Ceriodaphnia dubiamonthly averagereport only (tox chronic)all year
Toxicity [chronic], Ceriodaphnia dubiadaily maximumreport only (tox chronic)all year
Toxicity [chronic], Pimephales promelas [Fathead Minnow]monthly averagereport only (tox chronic)all year
Toxicity [chronic], Pimephales promelas [Fathead Minnow]daily maximumreport only (tox chronic)all year

How strict are these limits?

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

Same industry: the 6 Wholesale Trade — Durable Goods permits in West Virginia.

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