MEPCO, LLC

NPDES permit WV0117901 · Minor NON-POTW · effective, expires 2027-09-06 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

EPA's record, 2025-09-01 to 2026-08-31

35values over a limit
20required values missing, on 8 form(s)
2of 17 forms filed late

Last period with anything received: 2026-07-31. Most often over: Cobalt, total recoverable (18), Aluminum, total recoverable (13), Nickel, total recoverable (2).

Reporting

Reports are due about 25 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (34)

OutfallParameterStatisticLimitMonths
001pHINST MIN >= 6 SU all year
001pHINST MAX <= 9 SU all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedDAILY MX report only all year
001Hardness, total [as CaCO3]MO AVG report only all year
001Hardness, total [as CaCO3]DAILY MX report only all year
001Arsenic, total recoverableMO AVG report only all year
001Arsenic, total recoverableDAILY MX report only all year
001Cobalt, total recoverableMO AVG <= .0008 mg/L all year
001Cobalt, total recoverableDAILY MX <= .0016 mg/L all year
001Iron, total recoverableMO AVG <= 1.23 mg/L all year
001Iron, total recoverableDAILY MX <= 2.19 mg/L all year
001Selenium, total recoverableMO AVG report only all year
001Selenium, total recoverableDAILY MX report only all year
001Beryllium, total recoverable [as Be]MO AVG report only all year
001Beryllium, total recoverable [as Be]DAILY MX report only all year
001Chromium, hexavalent [as Cr]MO AVG report only all year
001Chromium, hexavalent [as Cr]DAILY MX report only all year
001Nickel, total recoverableMO AVG <= .104 mg/L all year
001Nickel, total recoverableDAILY MX <= .209 mg/L all year
001Zinc, total recoverableMO AVG <= .146 mg/L all year
001Zinc, total recoverableDAILY MX <= .293 mg/L all year
001Aluminum, total recoverableMO AVG <= .374 mg/L all year
001Aluminum, total recoverableDAILY MX <= .75 mg/L all year
001Cadmium, total recoverableMO AVG <= .0005 mg/L all year
001Cadmium, total recoverableDAILY MX <= .001 mg/L all year
001Copper, total recoverableMO AVG report only all year
001Copper, total recoverableDAILY MX report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Toxicity [chronic], Ceriodaphnia dubiaMO AVG report only all year
001Toxicity [chronic], Ceriodaphnia dubiaDAILY MX report only all year
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]MO AVG report only all year
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]DAILY MX report only all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states