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Clean Water Act discharge permit · NPDES TX0002844

SEADRIFT INFRASTRUCTURE, Seadrift, TX: NPDES TX0002844 discharge permit, effluent exceedances, inspections, penalties

SEADRIFT INFRASTRUCTURE, held by UNION CARBIDE CORPORATION, holds NPDES permit TX0002844, which discharges to Victoria Barage;Lavaca-Guadalupe. EPA’s file records it issued December 3, 2014 and expiring October 1, 2019. 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 filedSEADRIFT INFRASTRUCTURE
Permittee as filedUNION CARBIDE CORPORATION
NPDES IDTX0002844
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
IssuedDecember 3, 2014
Expiration dateOctober 1, 2019
AddressSeadrift, TX 77983
Receiving waterVICTORIA BARAGE;LAVACA-GUADALUPE
SubwatershedPowderhorn Lake-Matagorda Bay (HUC 121004020500)

Cited to the EPA ICIS-NPDES permit file (ECHO 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; the 60 with the most exceedances of 86 are shown.

Pollutant or measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Enterococci42016September 30, 202299,999% over the limit
Flow [dry weather]4139June 30, 2026153% over the limit
Temperature, water deg. fahrenheit155June 30, 20244% over the limit
Chlorine, total residual155June 30, 2024305% over the limit
pH30344April 30, 2022
Carbon, tot organic [TOC]16203March 31, 2025251% over the limit
pH range excursions, > 60 minutes253March 31, 20252,147,483,650% over the limit
Oil & Grease13141July 31, 202360% over the limit
pH range excursions, monthly total accum231March 31, 2025191% over the limit
BOD, 5-day, 20 deg. C5110
Solids, total suspended5110
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)240
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia240
LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)240
LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidia240
Hexachlorobutadiene220
LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia)220
LC50 Pass/Fail Static 24Hr Acute Menidia menidia220
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)220
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia220
LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)220
LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidia220
3,4-Benzofluoranthene020
Flow, in conduit or thru treatment plant2600
Whole effluent toxicity - retest #1400
Whole effluent toxicity - retest #2400
Copper, total [as Cu]200
Carbon tetrachloride200
1,2-Dichloroethane200
Chloroform200
Toluene200
Benzene200
Acenaphthylene200
Acenaphthene200
Acrylonitrile200
Anthracene200
Benzo[b]fluoranthene200
Benzo[k]fluoranthene200
Benzo[a]pyrene200
Chlorobenzene200
Chrysene200
Diethyl phthalate200
Dimethyl phthalate200
Ethylbenzene200
Fluoranthene200
Fluorene200
Hexachloroethane200
Methyl chloride [Chloromethane]200
Methylene chloride200
Nitrobenzene200
Phenanthrene200
Pyrene200
Tetrachloroethylene200
1,1-Dichloroethane200
1,1-Dichloroethylene200
1,1,1-Trichloroethane200
1,1,2-Trichloroethane200
Benzo[a]anthracene200
1,2-Dichlorobenzene200
1,2-Dichloropropane200

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
January 22, 2026Permit Violations - Violation Specified in CommentST6
August 1, 2023Permit Violations - Violation Specified in CommentST6
August 7, 2019Permit 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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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 TX0002844 there.

Nearby on the register

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