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Clean Water Act discharge permit · NPDES TX0065854

COMANCHE PEAK NUCLEAR POWER PLANT, Glen Rose, TX: NPDES TX0065854 discharge permit, effluent exceedances, inspections, penalties

COMANCHE PEAK NUCLEAR POWER PLANT, held by COMANCHE PEAK POWER COMPANY LLC, holds NPDES permit TX0065854, which discharges to Squaw Creek Reservoir;Squaw Ck;Paluxy Rv. EPA’s file records it issued October 7, 2019 and expiring October 7, 2024. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filedCOMANCHE PEAK NUCLEAR POWER PLANT
Permittee as filedCOMANCHE PEAK POWER COMPANY LLC
NPDES IDTX0065854
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMajor discharger
Facility typeNot a publicly owned treatment works
IssuedOctober 7, 2019
Expiration dateOctober 7, 2024
AddressGlen Rose, TX 76043
Receiving waterSQUAW CREEK RESERVOIR;SQUAW CK;PALUXY RV
SubwatershedSquaw Creek (HUC 120602020110)
SIC4911 – Electric Services

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.

Effluent limits and exceedances

An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.

Pollutant or measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
pH655December 31, 2014
Solids, total suspended633March 31, 20215% over the limit
Coliform, fecal general011April 30, 20123% over the limit
LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas440
LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas440
Flow, in conduit or thru treatment plant1020
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia420
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas420
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia420
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas420
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia420
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas420
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia420
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas420
LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia420
LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia420
Copper, total [as Cu]220
Iron, total [as Fe]220
Whole effluent toxicity - retest #1700
Whole effluent toxicity - retest #2700
Oil & Grease400
Chlorine, total residual400
Chlorine, free available400
Temperature, water deg. fahrenheit200
BOD, 5-day, 20 deg. C200
E. coli200
LC50 Pass/Fail Static 24Hr Acute D. Pulex100
LC50 Pass/Fail Static 24Hr Acute Pimephales promelas100

Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.

Inspections, violations and enforcement

DateWhat EPA recordedAgency
December 10, 2020Permit Violations - Violation Specified in CommentST6

Inspections

EPA’s inspection file holds no inspection for NPDES TX0065854.

Formal enforcement and penalties

0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.

Informal enforcement

EPA’s informal enforcement file holds no action for NPDES TX0065854.

Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.

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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID TX0065854 there.

COMANCHE PEAK NUCLEAR POWER PLANT, Glen Rose, Texas: Individual permit TX0065854, held by COMANCHE PEAK POWER COMPANY LLC; Administratively continued (past its expiration date and still in force until reissued); issued October 7, 2019, term to October 7, 2024; discharges to SQUAW CREEK RESERVOIR;SQUAW CK;PALUXY RV.

  • pH: 6 limits, 5 violations of any kind, 5 effluent exceedances, latest December 31, 2014.
  • Solids, total suspended: 6 limits, 3 violations of any kind, 3 effluent exceedances, latest March 31, 2021, largest 5% over the limit.
  • Coliform, fecal general: 0 limits, 1 violation of any kind, 1 effluent exceedance, latest April 30, 2012, largest 3% over the limit.
  • LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas: 4 limits, 4 violations of any kind, 0 effluent exceedances.
  • LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas: 4 limits, 4 violations of any kind, 0 effluent exceedances.
  • Flow, in conduit or thru treatment plant: 10 limits, 2 violations of any kind, 0 effluent exceedances.
  • Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia: 4 limits, 2 violations of any kind, 0 effluent exceedances.
  • Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas: 4 limits, 2 violations of any kind, 0 effluent exceedances.
  • NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 4 limits, 2 violations of any kind, 0 effluent exceedances.
  • NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas: 4 limits, 2 violations of any kind, 0 effluent exceedances.
  • NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 4 limits, 2 violations of any kind, 0 effluent exceedances.
  • NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas: 4 limits, 2 violations of any kind, 0 effluent exceedances.
  • Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 4 limits, 2 violations of any kind, 0 effluent exceedances.
  • Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas: 4 limits, 2 violations of any kind, 0 effluent exceedances.
  • LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia: 4 limits, 2 violations of any kind, 0 effluent exceedances.
  • LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia: 4 limits, 2 violations of any kind, 0 effluent exceedances.
  • Copper, total [as Cu]: 2 limits, 2 violations of any kind, 0 effluent exceedances.
  • Iron, total [as Fe]: 2 limits, 2 violations of any kind, 0 effluent exceedances.
  • Whole effluent toxicity - retest #1: 7 limits, 0 violations of any kind, 0 effluent exceedances.
  • Whole effluent toxicity - retest #2: 7 limits, 0 violations of any kind, 0 effluent exceedances.
  • Oil & Grease: 4 limits, 0 violations of any kind, 0 effluent exceedances.
  • Chlorine, total residual: 4 limits, 0 violations of any kind, 0 effluent exceedances.
  • Chlorine, free available: 4 limits, 0 violations of any kind, 0 effluent exceedances.
  • Temperature, water deg. fahrenheit: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • BOD, 5-day, 20 deg. C: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • E. coli: 2 limits, 0 violations of any kind, 0 effluent exceedances.
  • LC50 Pass/Fail Static 24Hr Acute D. Pulex: 1 limit, 0 violations of any kind, 0 effluent exceedances.
  • LC50 Pass/Fail Static 24Hr Acute Pimephales promelas: 1 limit, 0 violations of any kind, 0 effluent exceedances.
  • December 10, 2020: Permit Violations - Violation Specified in Comment (ST6).

COMANCHE PEAK NUCLEAR POWER PLANT among its neighbors

EPA’s permit file holds 19 discharge permits in the Squaw Creek subwatershed (HUC 120602020110), TX0065854 among them. Its county holds 26, 1 of them major permits; TX0065854 is a major permit.

Other permits in the Squaw Creek subwatershed (HUC 120602020110)

  • 377 SAND PIT, Tolar: TXR05GB04, minor permit, permit term to August 13, 2026
  • BRAZOS ELECTRIC POWER COOP, Tolar: TXR05GS64, minor permit, permit term to August 13, 2026
  • CASON DEVELOPMENT, Tolar: TXR1588UJ, minor permit, discharging to UNKNOWN, permit term to March 4, 2028
  • CASON RESIDENTIAL, Tolar: TXR1539UM, minor permit, discharging to COMANCHE CREEK, permit term to March 4, 2028
  • CITY OF TOLAR WWTP, Tolar: TX0027685, minor permit, discharging to SQUAW CRK;SQUAW CRK RES;SQUAW CRK;PALUXY RIV, permit term to March 6, 2024
  • CPNPP GUN RANGE PHASE 1, Glen Rose: TXR1567YX, minor permit, discharging to COMANCHE PEAK RESERVOIR, permit term to March 4, 2028
  • FLOOR & DECOR, Mansfield: TXR1526MS, minor permit, discharging to HOGPEN BRANCH, permit term to March 4, 2028
  • HAPPY HILL FARM CHILDRENS HOME WWTP, Granbury: TX0138827, minor permit, discharging to UNNAMED TRIB:SHAW CRK;PALUXY RVR;N PALUXY RVR, permit term to July 15, 2024
  • MICHAEL FRANKLIN, Granbury: TXR1518TN, minor permit, discharging to GRANBURY, permit term to March 4, 2028
  • OCP TRES RIOS WWTF, Glen Rose: TX0136395, minor permit, discharging to BRAZOS RIVER BELOW LAKE GRANBURY, permit term to May 1, 2019

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

What this page shows

This public-records page covers NPDES permit TX0065854 for the Comanche Peak Nuclear Power Plant in Glen Rose, TX, held by Comanche Peak Power Company LLC, with a permit status of administratively continued and a major discharger class. The listed figures are 27 for the discharger class and 3 pollutants under a numeric limit, with 3 pollutants showing an effluent exceedance.