Dynegy Energy Washington LLC

NPDES permit OH0127841 · Major NON-POTW · effective, expires 2026-12-31 · EPA's file as of 2026-09-19

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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

2values over a limit
0required values missing, on 0 form(s)
0of 111 forms filed late

Last period with anything received: 2026-07-31. Most often over: Solids, total suspended (2).

Reporting

Reports are due about 20 days after each monitoring period ends (the most common figure among OH permits in EPA's filings — check your permit).

Limits in force (105)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitMO AVG report only all year
001Temperature, water deg. fahrenheitDAILY MX report only all year
001Oxygen demand, chem. [low level] [COD]MO AVG report only all year
001Oxygen demand, chem. [low level] [COD]DAILY MX report only all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedDAILY MX report only all year
001Oil and grease, hexane extr methodDAILY MX <= 10 mg/L all year
001Zinc, total recoverableMO AVG report only all year
001Zinc, total recoverableDAILY MX report only all year
001Copper, total recoverableMO AVG report only all year
001Copper, total recoverableDAILY MX report only all year
001Oxidants, total residualDAILY MX <= .025 mg/L 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
001Chlorine, total residualDAILY MX <= .2 mg/L all year
001Toxicity [acute], Ceriodaphnia dubiaMO AVG report only Aug
001Toxicity [acute], Ceriodaphnia dubiaDAILY MX report only Aug
001Toxicity [acute], Pimephales promelas [Fathead Minnow]MO AVG report only Aug
001Toxicity [acute], Pimephales promelas [Fathead Minnow]DAILY MX report only Aug
001pH, maximumDAILY MX <= 9 SU all year
001pH, minimumDAILY MN >= 6.5 SU all year
001Solids, total dissolved- 180 deg. CMO AVG report only all year
001Solids, total dissolved- 180 deg. CDAILY MX report only all year
001Chlorination durationDAILY MX <= 120 min all year
001BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
001BOD, carbonaceous [5 day, 20 C]DAILY MX report only all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
003Flow, in conduit or thru treatment plantMO AVG report only all year
003Flow, in conduit or thru treatment plantDAILY MX report only all year
004Flow, in conduit or thru treatment plantMO AVG report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
091Temperature, water deg. fahrenheitMO AVG report only all year
091Temperature, water deg. fahrenheitDAILY MX report only all year
091Oxygen demand, chem. [low level] [COD]MO AVG report only all year
091Oxygen demand, chem. [low level] [COD]DAILY MX report only all year
091Solids, total suspendedMO AVG report only all year
091Solids, total suspendedDAILY MX report only all year
091Oil and grease, hexane extr methodDAILY MX <= 10 mg/L all year
091Zinc, total recoverableMO AVG report only all year
091Zinc, total recoverableDAILY MX report only all year
091Copper, total recoverableMO AVG report only all year
091Copper, total recoverableDAILY MX report only all year
091Oxidants, total residualDAILY MX <= .0048 mg/L all year
091Flow, in conduit or thru treatment plantMO AVG report only all year
091Flow, in conduit or thru treatment plantDAILY MX report only all year
091Chlorine, total residualDAILY MX <= .038 mg/L all year
091Toxicity [acute], Ceriodaphnia dubiaMO AVG report only Aug
091Toxicity [acute], Ceriodaphnia dubiaDAILY MX report only Aug
091Toxicity [acute], Pimephales promelas [Fathead Minnow]MO AVG report only Aug
091Toxicity [acute], Pimephales promelas [Fathead Minnow]DAILY MX report only Aug
091pH, maximumDAILY MX <= 9 SU all year
091pH, minimumDAILY MN >= 6.5 SU all year
091Solids, total dissolved- 180 deg. CMO AVG report only all year
091Solids, total dissolved- 180 deg. CDAILY MX report only all year
091Chlorination durationMO AVG report only all year
091Chlorination durationDAILY MX report only all year
091BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
091BOD, carbonaceous [5 day, 20 C]DAILY MX report only all year
596Biosolids weight indluding admixturesMO AVG report only Dec
596Biosolids weight indluding admixturesDAILY MX report only Dec
602pHDAILY MN report only all year
602pHDAILY MX report only all year
602Solids, total suspendedMO AVG <= 30 mg/L all year
602Solids, total suspendedDAILY MX <= 100 mg/L all year
602Solids, total suspendedMO AVG <= 8.06 kg/d all year
602Solids, total suspendedDAILY MX <= 26.9 kg/d all year
602Oil and grease, hexane extr methodMO AVG <= 15 mg/L all year
602Oil and grease, hexane extr methodDAILY MX <= 20 mg/L all year
602Oil and grease, hexane extr methodMO AVG <= 4 kg/d all year
602Oil and grease, hexane extr methodDAILY MX <= 5.4 kg/d all year
602Flow, in conduit or thru treatment plantMO AVG report only all year
602Flow, in conduit or thru treatment plantDAILY MX report only all year
603pHDAILY MN report only all year
603pHDAILY MX report only all year
603Solids, total suspendedMO AVG <= 30 mg/L all year
603Solids, total suspendedDAILY MX <= 100 mg/L all year
603Solids, total suspendedMO AVG <= 1.42 kg/d all year
603Solids, total suspendedDAILY MX <= 4.73 kg/d all year
603Oil and grease, hexane extr methodMO AVG <= 15 mg/L all year
603Oil and grease, hexane extr methodDAILY MX <= 20 mg/L all year
603Oil and grease, hexane extr methodMO AVG <= .71 kg/d all year
603Oil and grease, hexane extr methodDAILY MX <= .95 kg/d all year
603Flow, in conduit or thru treatment plantMO AVG report only all year
603Flow, in conduit or thru treatment plantDAILY MX report only all year
604Flow rateMO AVG report only all year
604Flow rateDAILY MX report only all year
604Solids, total suspendedMO AVG report only all year
604Solids, total suspendedDAILY MX report only all year
604Oil and grease, hexane extr methodMO AVG report only all year
604Oil and grease, hexane extr methodDAILY MX report only all year
604Iron, total recoverableMO AVG report only all year
604Iron, total recoverableDAILY MX report only all year
604Copper, total recoverableMO AVG report only all year
604Copper, total recoverableDAILY MX report only all year
801Temperature, water deg. fahrenheitMO AVG report only May, Jun, Jul, Aug, Sep, Oct
801Temperature, water deg. fahrenheitDAILY MX report only May, Jun, Jul, Aug, Sep, Oct
801Hardness, total [as CaCO3]MO AVG report only all year
801Hardness, total [as CaCO3]DAILY MX report only all year
801%Effect Static Renewal 48Hr Acute Ceriodaphnia dubiaMO AVG report only Aug
801%Effect Static Renewal 48Hr Acute Ceriodaphnia dubiaDAILY MX report only Aug
801%Effect Static Renewal 96Hr Acute Pimephales promelasMO AVG report only Aug
801%Effect Static Renewal 96Hr Acute Pimephales promelasDAILY MX report only Aug
802Flow, in conduit or thru treatment plantMO AVG report only all year
802Flow, in conduit or thru treatment plantDAILY 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