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Clean Water Act discharge permit · NPDES TX0003875

ASCEND PERFORMANCE MATERIALS CHOCOLATE BAYOU PLANT, Alvin, TX: NPDES TX0003875 discharge permit, effluent exceedances, inspections, penalties

ASCEND PERFORMANCE MATERIALS CHOCOLATE BAYOU PLANT, held by ASCEND PERFORMANCE MATERIALS TEXAS INC, holds NPDES permit TX0003875, which discharges to Chocolate Bayou Tidal, New Bayou. EPA’s file records it issued April 13, 2015 and expiring November 1, 2019. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filedASCEND PERFORMANCE MATERIALS CHOCOLATE BAYOU PLANT
Permittee as filedASCEND PERFORMANCE MATERIALS TEXAS INC
NPDES IDTX0003875
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
IssuedApril 13, 2015
Expiration dateNovember 1, 2019
AddressAlvin, TX 77512
Receiving waterCHOCOLATE BAYOU TIDAL, NEW BAYOU
Receiving water impaired303(D) Listed
SubwatershedMustang Bayou (HUC 120402040400)

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
Carbon, tot organic [TOC]92215June 30, 2026118% over the limit
Enterococci21515February 28, 20252,619% over the limit
Chlorine, total residual16314December 31, 2023105% over the limit
Solids, total suspended277November 30, 202495% over the limit
pH14176June 30, 2026
Oil & Grease7136July 31, 2023360% over the limit
Chloroform2115March 31, 2026778% over the limit
Flow, in conduit or thru treatment plant16263September 30, 202459% over the limit
BOD, 5-day, 20 deg. C453July 31, 202380% over the limit
Coliform, fecal general053October 31, 2007200% over the limit
Hexachlorobenzene880
Benzo[a]pyrene280
Benzo[a]anthracene280
Zinc, total [as Zn]460
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia460
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia460
Carbon tetrachloride260
1,2-Dichloroethane260
Toluene260
Benzene260
Acenaphthylene260
Acenaphthene260
Acrylonitrile260
Anthracene260
Benzo[k]fluoranthene260
Chlorobenzene260
Chrysene260
Diethyl phthalate260
Dimethyl phthalate260
Ethylbenzene260
Fluoranthene260
Fluorene260
Hexachlorobutadiene260
Hexachloroethane260
Methyl chloride [Chloromethane]260
Methylene chloride260
Nitrobenzene260
Phenanthrene260
Pyrene260
Tetrachloroethylene260
1,1-Dichloroethane260
1,1-Dichloroethylene260
1,1,1-Trichloroethane260
1,1,2-Trichloroethane260
1,2-Dichlorobenzene260
1,2-Dichloropropane260
trans-1,2-Dichloroethylene260
1,2,4-Trichlorobenzene260
1,3-Dichlorobenzene260
1,4-Dichlorobenzene260
2-Chlorophenol260
2-Nitrophenol260
2,4-Dichlorophenol260
2,4-Dimethylphenol260
2,4-Dinitrotoluene260
2,4-Dinitrophenol260
2,6-Dinitrotoluene260
4-Nitrophenol260
4,6-Dinitro-o-cresol260
Phenol260

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
September 4, 2025Permit Violations - Violation Specified in CommentST6
March 13, 2024Permit Violations - Violation Specified in CommentST6
November 9, 2021Permit Violations - Violation Specified in CommentST6
August 8, 2018Permit 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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How we handle your data → Privacy

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 TX0003875 there.

Nearby on the register

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