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Clean Water Act discharge permit · NPDES TX0052591

WASHBURN TUNNEL FACILITY, Houston, TX: NPDES TX0052591 discharge permit, effluent exceedances, inspections, penalties

WASHBURN TUNNEL FACILITY, held by GCWDA (WASHBURN TUNNEL FACILIT, holds NPDES permit TX0052591, which discharges to Seg 1007 Houston Ship Channel. EPA’s file records it issued August 31, 2005 and expiring August 1, 2010. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filedWASHBURN TUNNEL FACILITY
Permittee as filedGCWDA (WASHBURN TUNNEL FACILIT
NPDES IDTX0052591
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
ProgramPublicly owned treatment works
IssuedAugust 31, 2005
Expiration dateAugust 1, 2010
AddressHouston, TX 77506
Receiving waterSEG 1007 HOUSTON SHIP CHANNEL
Receiving water impaired303(D) Listed
SubwatershedVince Bayou-Buffalo Bayou (HUC 120401040703)
Other EPA IDs (FRS)RCRA handler TXD086977352; ICIS-AIR source TX0000004820100237

Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.

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; the 60 with the most exceedances of 114 are shown.

Pollutant or measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Enterococci: group D, MF trans, M-E, EIA44537January 31, 202499,999% over the limit
Solids, total suspended6126July 31, 2022156% over the limit
Nitrogen, ammonia total [as N]6126January 31, 2020119% over the limit
Cyanide, free [amenable to chlorination]11274November 30, 201174% over the limit
BOD, 5-day, 20 deg. C6104July 31, 201599,999% over the limit
Fluoride, total [as F]363August 31, 2008100% over the limit
Chlorine, total residual363May 31, 20139,454% over the limit
Sulfide, total [as S]682February 28, 2021192% over the limit
Chloroform682October 31, 201314% over the limit
Phenolics, total recoverable682July 31, 2006565% over the limit
Ethylbenzene682October 31, 20233,286% over the limit
Mercury, total [as Hg]1071September 30, 200917% over the limit
Oil & Grease671October 31, 200932% over the limit
Chromium, hexavalent [as Cr]671October 31, 202220% over the limit
Nickel, total [as Ni]671July 31, 2015458% over the limit
Toluene671October 31, 2023168% over the limit
1,3-Dichloropropylene6220
Silver, total [as Ag]5110
o-Cresol3110
2-Butanone3110
Phenol6100
Acenaphthene680
Zinc, total [as Zn]1170
Chromium, total [as Cr]770
Copper, total [as Cu]770
Lead, total [as Pb]770
Arsenic, total [as As]1060
Phenanthrene1060
Hexachlorobenzene1060
Carbon, tot organic [TOC]660
Cadmium, total [as Cd]660
Carbon tetrachloride660
1,2-Dichloroethane660
Benzene660
Acenaphthylene660
Acrylonitrile660
Anthracene660
Benzo[b]fluoranthene660
Benzo[k]fluoranthene660
Benzo[a]pyrene660
Chlorobenzene660
Chrysene660
Diethyl phthalate660
Dimethyl phthalate660
Fluoranthene660
Fluorene660
Hexachlorobutadiene660
Hexachloroethane660
Methyl chloride [Chloromethane]660
Methylene chloride660
Nitrobenzene660
Pyrene660
Tetrachloroethylene660
1,1-Dichloroethane660
1,1-Dichloroethylene660
1,1,1-Trichloroethane660
1,1,2-Trichloroethane660
Benzo[a]anthracene660
1,2-Dichlorobenzene660
1,2-Dichloropropane660

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
June 17, 2025Permit Violations - Violation Specified in CommentST6

Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.

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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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 TX0052591 for the Washburn Tunnel Facility in Houston, TX, held by GCWDA (WASHBURN TUNNEL FACILIT), a major discharger listed as administratively continued. The permit lists 16 pollutants under a numeric limit and 16 pollutants with an effluent exceedance, and discharges to Seg 1007 Houston Ship Channel in the Vince Bayou-Buffalo Bayou subwatershed (HUC 120401040703).