NRG TEXAS POWER LLC

NPDES permit TX0006394 · Major NON-POTW · administratively continued, expires 2024-08-31 · 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.

This permit expired on 2024-08-31 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

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

5values over a limit
0required values missing, on 0 form(s)
0of 202 forms filed late

Last period with anything received: 2026-08-31. Most often over: Whole Effluent Toxicity [WET] - C. dubia (4), E. coli (1).

Reporting

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

Limits in force (180)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitDAILY AV report only all year
001Temperature, water deg. fahrenheitDAILY MX <= 95 deg F all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Flow, in conduit or thru treatment plantDAILY AV <= 37 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Solids, total dissolvedDAILY MX <= 2500 mg/L all year
002pHMINIMUM >= 6 SU all year
002pHMAXIMUM <= 9 SU all year
002Solids, total suspendedDAILY AV <= 30 mg/L all year
002Solids, total suspendedDAILY MX <= 50 mg/L all year
002Oil & GreaseDAILY AV <= 15 mg/L all year
002Oil & GreaseDAILY MX <= 20 mg/L all year
002Copper, total [as Cu]DAILY AV <= .078 mg/L all year
002Copper, total [as Cu]DAILY MX <= .164 mg/L all year
002Iron, total [as Fe]DAILY AV <= 1 mg/L all year
002Iron, total [as Fe]DAILY MX <= 1 mg/L all year
002Selenium, total [as Se]DAILY MX <= .012 mg/L all year
002Flow, in conduit or thru treatment plantDAILY AV report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
003Temperature, water deg. fahrenheitDAILY AV <= 110 deg F all year
003Temperature, water deg. fahrenheitDAILY MX <= 118 deg F all year
003pHMINIMUM >= 6 SU all year
003pHMAXIMUM <= 9 SU all year
003Solids, total suspendedDAILY AV report only all year
003Solids, total suspendedDAILY MX report only all year
003Flow, in conduit or thru treatment plantDAILY AV <= 2121 MGD all year
003Flow, in conduit or thru treatment plantDAILY MX report only all year
003Chlorine, total residualDAILY MX <= .2 mg/L all year
003Chlorine, total residualDAILY MX <= 1770 lb/d all year
003Chlorine, free availableDAILY AV <= .2 mg/L all year
003Chlorine, free availableDAILY MX <= .5 mg/L all year
003Chlorine, free availableDAILY AV <= 295 lb/d all year
003Chlorine, free availableDAILY MX <= 737 lb/d all year
004pHMINIMUM >= 6 SU all year
004pHMAXIMUM <= 9 SU all year
004Solids, total suspendedDAILY AV <= 30 mg/L all year
004Solids, total suspendedDAILY MX <= 100 mg/L all year
004Oil & GreaseDAILY AV <= 15 mg/L all year
004Oil & GreaseDAILY MX <= 20 mg/L all year
004Selenium, total [as Se]DAILY AV <= .05 mg/L all year
004Selenium, total [as Se]DAILY MX <= .1 mg/L all year
004Flow, in conduit or thru treatment plantDAILY AV <= 1.296 MGD all year
004Flow, in conduit or thru treatment plantDAILY MX <= 2.6 MGD all year
005pHMINIMUM >= 6 SU all year
005pHMAXIMUM <= 9 SU all year
005Solids, total suspendedDAILY AV <= 30 mg/L all year
005Solids, total suspendedDAILY MX <= 100 mg/L all year
005Oil & GreaseDAILY AV <= 15 mg/L all year
005Oil & GreaseDAILY MX <= 20 mg/L all year
005Flow, in conduit or thru treatment plantDAILY AV report only all year
005Flow, in conduit or thru treatment plantDAILY MX report only all year
006pHMINIMUM >= 6 SU all year
006pHMAXIMUM <= 9 SU all year
006Solids, total suspendedDAILY AV <= 30 mg/L all year
006Solids, total suspendedDAILY MX <= 100 mg/L all year
006Oil & GreaseDAILY AV <= 15 mg/L all year
006Oil & GreaseDAILY MX <= 20 mg/L all year
006Flow, in conduit or thru treatment plantDAILY AV report only all year
006Flow, in conduit or thru treatment plantDAILY MX report only all year
103Solids, total suspendedDAILY AV <= 30 mg/L all year
103Solids, total suspendedDAILY MX <= 100 mg/L all year
103Oil & GreaseDAILY AV <= 15 mg/L all year
103Oil & GreaseDAILY MX <= 20 mg/L all year
103Copper, total [as Cu]DAILY AV <= .5 mg/L all year
103Copper, total [as Cu]DAILY MX <= 1 mg/L all year
103Iron, total [as Fe]DAILY AV <= 1 mg/L all year
103Iron, total [as Fe]DAILY MX <= 1 mg/L all year
103Selenium, total [as Se]DAILY MX <= .2 mg/L all year
103Flow, in conduit or thru treatment plantDAILY AV report only all year
103Flow, in conduit or thru treatment plantDAILY MX report only all year
113BOD, 5-day, 20 deg. CDAILY AV <= 20 mg/L all year
113BOD, 5-day, 20 deg. CDAILY MX <= 45 mg/L all year
113Solids, total suspendedDAILY AV <= 20 mg/L all year
113Solids, total suspendedDAILY MX <= 45 mg/L all year
113Flow, in conduit or thru treatment plantDAILY AV report only all year
113Flow, in conduit or thru treatment plantDAILY MX report only all year
113E. coliDAILY AV <= 126 CFU/100mL all year
113E. coliDAILY MX <= 399 CFU/100mL all year
203Solids, total suspendedDAILY AV <= 30 mg/L all year
203Solids, total suspendedDAILY MX <= 100 mg/L all year
203Oil & GreaseDAILY AV <= 15 mg/L all year
203Oil & GreaseDAILY MX <= 20 mg/L all year
203Selenium, total [as Se]DAILY MX <= .2 mg/L all year
203Flow, in conduit or thru treatment plantDAILY AV report only all year
203Flow, in conduit or thru treatment plantDAILY MX report only all year
303Solids, total suspendedDAILY AV <= 30 mg/L all year
303Solids, total suspendedDAILY MX <= 100 mg/L all year
303Oil & GreaseDAILY AV <= 15 mg/L all year
303Oil & GreaseDAILY MX <= 20 mg/L all year
303Flow, in conduit or thru treatment plantDAILY AV report only all year
303Flow, in conduit or thru treatment plantDAILY MX report only all year
403Solids, total suspendedDAILY AV <= 30 mg/L all year
403Solids, total suspendedDAILY MX <= 100 mg/L all year
403Oil & GreaseDAILY AV <= 15 mg/L all year
403Oil & GreaseDAILY MX <= 20 mg/L all year
403Flow, in conduit or thru treatment plantDAILY AV report only all year
403Flow, in conduit or thru treatment plantDAILY MX report only all year
503Solids, total suspendedDAILY AV <= 30 mg/L all year
503Solids, total suspendedDAILY MX <= 100 mg/L all year
503Oil & GreaseDAILY AV <= 15 mg/L all year
503Oil & GreaseDAILY MX <= 20 mg/L all year
503Chromium, total [as Cr]DAILY AV <= .2 mg/L all year
503Chromium, total [as Cr]DAILY MX <= .2 mg/L all year
503Zinc, total [as Zn]DAILY AV <= 1 mg/L all year
503Zinc, total [as Zn]DAILY MX <= 1 mg/L all year
503Flow, in conduit or thru treatment plantDAILY AV report only all year
503Flow, in conduit or thru treatment plantDAILY MX report only all year
603Solids, total suspendedDAILY AV <= 30 mg/L all year
603Solids, total suspendedDAILY MX <= 100 mg/L all year
603Oil & GreaseDAILY AV <= 15 mg/L all year
603Oil & GreaseDAILY MX <= 20 mg/L all year
603Copper, total [as Cu]DAILY AV <= .5 mg/L all year
603Copper, total [as Cu]DAILY MX <= 1 mg/L all year
603Iron, total [as Fe]DAILY AV <= 1 mg/L all year
603Iron, total [as Fe]DAILY MX <= 1 mg/L all year
603Selenium, total [as Se]DAILY MX <= .2 mg/L all year
603Flow, in conduit or thru treatment plantDAILY AV report only all year
603Flow, in conduit or thru treatment plantDAILY MX report only all year
703Solids, total suspendedDAILY AV <= 30 mg/L all year
703Solids, total suspendedDAILY MX <= 100 mg/L all year
703Oil & GreaseDAILY AV <= 15 mg/L all year
703Oil & GreaseDAILY MX <= 20 mg/L all year
703Selenium, total [as Se]DAILY MX <= .2 mg/L all year
703Flow, in conduit or thru treatment plantDAILY AV report only all year
703Flow, in conduit or thru treatment plantDAILY MX report only all year
803Solids, total suspendedDAILY AV <= 30 mg/L all year
803Solids, total suspendedDAILY MX <= 100 mg/L all year
803Oil & GreaseDAILY AV <= 15 mg/L all year
803Oil & GreaseDAILY MX <= 20 mg/L all year
803Flow, in conduit or thru treatment plantDAILY AV report only all year
803Flow, in conduit or thru treatment plantDAILY MX report only all year
903BOD, 5-day, 20 deg. CDAILY AV <= 20 mg/L all year
903BOD, 5-day, 20 deg. CDAILY MX <= 45 mg/L all year
903Solids, total suspendedDAILY AV <= 20 mg/L all year
903Solids, total suspendedDAILY MX <= 45 mg/L all year
903Flow, in conduit or thru treatment plantDAILY AV report only all year
903Flow, in conduit or thru treatment plantDAILY MX report only all year
903E. coliDAILY AV <= 126 CFU/100mL all year
903E. coliDAILY MX <= 399 CFU/100mL all year
TX3Whole effluent toxicity - retest #17 DA MIN report only all year
TX3Whole effluent toxicity - retest #1MO AV MN report only all year
TX3Whole effluent toxicity - retest #27 DA MIN report only all year
TX3Whole effluent toxicity - retest #2MO AV MN report only all year
TX3Whole Effluent Toxicity [WET] - C. dubia7 DA MIN >= 80 % all year
TX3Whole Effluent Toxicity [WET] - C. dubiaMO AV MN >= 80 % all year
TX3Whole Effluent Toxicity [WET] - C. dubia7 DA MIN >= 100 % all year
TX3Whole Effluent Toxicity [WET] - C. dubiaMO AV MN >= 100 % all year
TX3Whole Effluent Toxicity [WET] - C. dubia7 DA MIN report only all year
TX3Whole Effluent Toxicity [WET] - C. dubiaMO AV MN report only all year
TX3Whole Effluent Toxicity [WET] - C. dubia7 DA MIN report only all year
TX3Whole Effluent Toxicity [WET] - C. dubiaMO AV MN report only all year
TX3Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX3Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
TX3Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX3Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelasMO AV MN report only all year
TX3NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX3NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
TX3NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX3NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelasMO AV MN report only all year
TX3NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX3NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
TX3NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX3NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasMO AV MN report only all year
TX3Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX3Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
TX3Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas7 DA MIN report only all year
TX3Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelasMO AV MN report only all year
TX3LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX3LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
TX3LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX3LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelasMO AV MN report only all year
TX3LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX3LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AV MN report only all year
TX3LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX3LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelasMO AV MN report only all year
TXCWhole effluent toxicity - retest #1SINGSAMP report only all year
TXCWhole effluent toxicity - retest #2SINGSAMP report only all year
TXCLC50 Pass/Fail Static 24Hr Acute D. PulexSINGSAMP report only all year
TXCLC50 Pass/Fail Static 24Hr Acute Pimephales promelasSINGSAMP 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