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Clean Water Act discharge permit · NPDES TX0087971

SOLVAY INTEROX DEER PARK PLANT, La Porte, TX: NPDES TX0087971 discharge permit, effluent exceedances, inspections, penalties

SOLVAY INTEROX DEER PARK PLANT, held by SOLVAY CHEMICALS INC, holds NPDES permit TX0087971, which discharges to Phillips Ditch, Santa Anna Bayou; Hsc/San Jacinto. EPA’s file records it issued October 16, 2019 and expiring October 16, 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 filedSOLVAY INTEROX DEER PARK PLANT
Permittee as filedSOLVAY CHEMICALS INC
NPDES IDTX0087971
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
IssuedOctober 16, 2019
Expiration dateOctober 16, 2024
AddressLa Porte, TX 77571
Receiving waterPHILLIPS DITCH, SANTA ANNA BAYOU; HSC/SAN JACINTO
SubwatershedGoose Creek-Frontal Galveston Bay (HUC 120401040706)
SIC2819 – Industrial Inorganic Chemicals
Other EPA IDs (FRS)RCRA handler TXD093969384

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

Pollutant or measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
BOD, 5-day, 20 deg. C23328January 31, 2024190% over the limit
Aluminum, total [as Al]22114July 31, 2024155% over the limit
Carbon, tot organic [TOC]3134October 31, 201734% over the limit
Whole Effluent Toxicity [WET] - M. beryllina343March 31, 202399,999% over the limit
Oil & Grease2102May 31, 201987% over the limit
pH482December 31, 2009
pH range excursions, > 60 minutes131December 31, 200599,999% over the limit
Flow, in conduit or thru treatment plant4140
Whole effluent toxicity0140
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)270
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia270
Solids, total suspended250
pH range excursions, monthly total accum120
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)210
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia210
NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)210
NOEC Lethal Static Renewal 7 Day Chronic Menidia menidia210
NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)210
NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia210
Temperature, water deg. fahrenheit110
Whole effluent toxicity - retest #1300
Whole effluent toxicity - retest #2300
Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia)300
LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)200
LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidia200
LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)200
LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidia200
Oxygen, dissolved [DO]100
LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia)100
LC50 Pass/Fail Static 24Hr Acute Menidia menidia100

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

EPA’s single-event violation file, as loaded, holds no violation for NPDES TX0087971.

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 October 14, 2026.

What this page shows

This public-records page covers the NPDES TX0087971 Clean Water Act discharge permit held by Solvay Chemicals Inc for the Solvay Interox Deer Park Plant in La Porte, TX, which is listed as administratively continued and as a minor discharger. The page lists 7 pollutants under a numeric limit and 7 pollutants with an effluent exceedance.