MONONGAHELA POWER COMPANY — NPDES permit WV0050784: limits, due date and EPA's record

NPDES permit WV0050784 · Minor NON-POTW · expired 2026-02-28 · EPA's file as of 2026-09-26

Keep this permit as a site — opens New site at EPA's facility point (39.4931, -79.6058); you set the radius.

These are the last limits EPA's file holds for this permit, from an earlier version of it (version 0 in EPA's file): its current version carries none yet. Read your permit: a renewal can change them.

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

Reporting

Reports are due about 25 days after each monitoring period ends (the most common figure among WV permits in EPA's filings — check your permit).

How strict are these limits?

Each concentration limit against the same limit in comparable permits. Where it appears more than once, its strictest value.

Limits in force (48)

Outfall	Parameter	Statistic	Limit	Months
002	Oxygen, dissolved [DO]	daily minimum	>= 5 mg/L	all year
002	Oxygen, dissolved [DO]	monthly average	report only	all year
002	pH	instantaneous minimum	>= 6 SU	all year
002	pH	instantaneous maximum	<= 9 SU	all year
002	Solids, total suspended	monthly average	report only	all year
002	Solids, total suspended	daily maximum	report only	all year
002	Hardness, total [as CaCO3]	monthly average	report only	all year
002	Hardness, total [as CaCO3]	daily maximum	report only	all year
002	Arsenic, total recoverable	monthly average	report only	all year
002	Arsenic, total recoverable	daily maximum	report only	all year
002	Iron, total recoverable	monthly average	report only	all year
002	Iron, total recoverable	daily maximum	report only	all year
002	Beryllium, total recoverable [as Be]	monthly average	report only	all year
002	Beryllium, total recoverable [as Be]	daily maximum	report only	all year
002	Boron, total [as B]	monthly average	report only	all year
002	Boron, total [as B]	daily maximum	report only	all year
002	Chromium, hexavalent [as Cr]	monthly average	report only	all year
002	Chromium, hexavalent [as Cr]	daily maximum	report only	all year
002	Nickel, total recoverable	monthly average	report only	all year
002	Nickel, total recoverable	daily maximum	report only	all year
002	Zinc, total recoverable	monthly average	report only	all year
002	Zinc, total recoverable	daily maximum	report only	all year
002	Aluminum, total recoverable	monthly average	report only	all year
002	Aluminum, total recoverable	daily maximum	report only	all year
002	Cadmium, total recoverable	monthly average	report only	all year
002	Cadmium, total recoverable	daily maximum	report only	all year
002	Lead, total recoverable	monthly average	report only	all year
002	Lead, total recoverable	daily maximum	report only	all year
002	Copper, total recoverable	monthly average	report only	all year
002	Copper, total recoverable	daily maximum	report only	all year
002	Selenium, total [as Se]	monthly average	report only	all year
002	Selenium, total [as Se]	daily maximum	report only	all year
002	Manganese, total recoverable	monthly average	report only	all year
002	Manganese, total recoverable	daily maximum	report only	all year
002	Flow, in conduit or thru treatment plant	monthly average	report only	all year
002	Flow, in conduit or thru treatment plant	daily maximum	report only	all year
002	Toxicity [acute], Ceriodaphnia dubia	monthly average	<= .08 tox acute	all year
002	Toxicity [acute], Ceriodaphnia dubia	daily maximum	<= .16 tox acute	all year
002	Toxicity [chronic], Ceriodaphnia dubia	monthly average	report only	all year
002	Toxicity [chronic], Ceriodaphnia dubia	daily maximum	report only	all year
002	Toxicity [acute], Pimephales promelas [Fathead Minnow]	monthly average	<= .08 tox acute	all year
002	Toxicity [acute], Pimephales promelas [Fathead Minnow]	daily maximum	<= .16 tox acute	all year
002	Toxicity [chronic], Pimephales promelas [Fathead Minnow]	monthly average	report only	all year
002	Toxicity [chronic], Pimephales promelas [Fathead Minnow]	daily maximum	report only	all year
002	Solids, total dissolved	monthly average	report only	all year
002	Solids, total dissolved	daily maximum	report only	all year
002	Sulfate	monthly average	report only	all year
002	Sulfate	daily maximum	report only	all year