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Clean Water Act discharge permit · NPDES TX0137502

GREGORY POWER PLANT, Gregory, TX: NPDES TX0137502 discharge permit, effluent exceedances, inspections, penalties

GREGORY POWER PLANT, held by GREGORY POWER PARTNERS LLC, holds NPDES permit TX0137502, which discharges to Corpus Christi Bay. EPA’s file records it issued February 18, 2021 and expiring February 18, 2026.

GREGORY POWER PLANT, Gregory, Texas: Individual permit TX0137502, held by GREGORY POWER PARTNERS LLC; Administratively continued (past its expiration date and still in force until reissued); issued February 18, 2021, term to February 18, 2026; discharges to Corpus Christi Bay.

  • Solids, total suspended: 8 limits, 107 violations of any kind, 3 effluent exceedances, latest March 31, 2026, largest 37% over the limit.
  • Chlorine, free available: 4 limits, 95 violations of any kind, 3 effluent exceedances, latest June 30, 2025, largest 287% over the limit.
  • Zinc, total [as Zn]: 5 limits, 62 violations of any kind, 3 effluent exceedances, latest April 30, 2021, largest 120% over the limit.
  • Flow, in conduit or thru treatment plant: 8 limits, 140 violations of any kind, 1 effluent exceedance, latest February 28, 2023, largest 39% over the limit.
  • pH: 6 limits, 83 violations of any kind, 1 effluent exceedance, latest May 31, 2019.
  • Oil & Grease: 4 limits, 54 violations of any kind, 0 effluent exceedances.
  • Chromium, total [as Cr]: 4 limits, 53 violations of any kind, 0 effluent exceedances.
  • BOD, 5-day, 20 deg. C: 4 limits, 52 violations of any kind, 0 effluent exceedances.
  • Temperature, water deg. fahrenheit: 2 limits, 28 violations of any kind, 0 effluent exceedances.
  • Chlorine, total residual: 1 limit, 14 violations of any kind, 0 effluent exceedances.
  • Enterococci: 2 limits, 8 violations of any kind, 0 effluent exceedances.
  • Cyanide, free available: 1 limit, 3 violations of any kind, 0 effluent exceedances.
  • Copper, total [as Cu]: 1 limit, 1 violation of any kind, 0 effluent exceedances.
  • March 25, 2024: Permit Violations - Violation Specified in Comment (ST6).
  • April 17, 2019: Permit Violations - Violation Specified in Comment (ST6).

Other permits held by GREGORY POWER PARTNERS LLC

GREGORY POWER PLANT among its neighbors

EPA’s permit file holds 36 discharge permits in the Kinney Bayou subwatershed (HUC 121102010003), TX0137502 among them. Its county holds 119, 6 of them major permits; TX0137502 is a minor permit.

Other permits in the Kinney Bayou subwatershed (HUC 121102010003)

Identity

Facility as filedGREGORY POWER PLANT
Permittee as filedGREGORY POWER PARTNERS LLC
NPDES IDTX0137502
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedFebruary 18, 2021
Expiration dateFebruary 18, 2026
AddressGregory, TX 78359
Receiving waterCorpus Christi Bay
SubwatershedKinney Bayou (HUC 121102010003)

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
Solids, total suspended81073March 31, 202637% over the limit
Chlorine, free available4953June 30, 2025287% over the limit
Zinc, total [as Zn]5623April 30, 2021120% over the limit
Flow, in conduit or thru treatment plant81401February 28, 202339% over the limit
pH6831May 31, 2019
Oil & Grease4540
Chromium, total [as Cr]4530
BOD, 5-day, 20 deg. C4520
Temperature, water deg. fahrenheit2280
Chlorine, total residual1140
Enterococci280
Cyanide, free available130
Copper, total [as Cu]110

Inspections, violations and enforcement

DateWhat EPA recordedAgency
March 25, 2024Permit Violations - Violation Specified in CommentST6
April 17, 2019Permit Violations - Violation Specified in CommentST6

Inspections

EPA’s inspection file holds no inspection for NPDES TX0137502.

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 TX0137502.

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Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

What this page shows

This public-records page covers NPDES permit TX0137502, held by Gregory Power Partners LLC for the Gregory Power Plant in Gregory, TX, which discharges to Corpus Christi Bay and lies within the Kinney Bayou subwatershed (HUC 121102010003). The page lists 13 pollutants on file, all under a numeric limit, and 5 pollutants with an effluent exceedance.