Clean Water Act discharge permit · NPDES TX0076996
EQUISTAR CHEMICALS, Corpus Christi, TX: NPDES TX0076996 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 88Pollutants under a numeric limit
- 15Pollutants with an effluent exceedance
EQUISTAR CHEMICALS, held by EQUISTAR CHEMICALS, LP, holds NPDES permit TX0076996, which discharges to Corpus Christi Inner Harbor. EPA’s file records it issued February 24, 2015 and expiring January 1, 2020. 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 filed | EQUISTAR CHEMICALS |
|---|---|
| Permittee as filed | EQUISTAR CHEMICALS, LP |
| NPDES ID | TX0076996 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | February 24, 2015 |
| Expiration date | January 1, 2020 |
| Address | Corpus Christi, TX 78410 |
| Receiving water | CORPUS CHRISTI INNER HARBOR |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | West Oso Creek-Oso Creek (HUC 121102020102) |
| SIC | 2869 – Industrial Organic Chemicals |
| Other EPA IDs (FRS) | RCRA handler TXD000836445; ICIS-AIR source TX0000004835500089 |
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
- 91Pollutants on file
- 88Under a numeric limit
- 86With a violation of any kind
- 15With an effluent exceedance
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 91 are shown.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Copper, total [as Cu] | 4 | 9 | 9 | December 31, 2023 | 228% over the limit |
| Oil & Grease | 4 | 7 | 5 | April 30, 2021 | 35% over the limit |
| Enterococci | 0 | 5 | 5 | November 30, 2025 | 99,999% over the limit |
| Sulfide, total [as S] | 2 | 11 | 3 | November 30, 2024 | 310% over the limit |
| Cyanide, free [amenable to chlorination] | 4 | 10 | 2 | February 28, 2019 | 47% over the limit |
| 2,4-Dimethylphenol | 2 | 6 | 2 | August 31, 2003 | 300% over the limit |
| Phenol | 2 | 6 | 2 | August 31, 2003 | 900% over the limit |
| Naphthalene | 2 | 6 | 2 | August 31, 2003 | 6,567% over the limit |
| Solids, total suspended | 2 | 2 | 2 | November 30, 2022 | 202% over the limit |
| Carbon, tot organic [TOC] | 2 | 2 | 2 | June 30, 2026 | 37% over the limit |
| Cyanide, free available | 0 | 2 | 2 | December 31, 2022 | 96% over the limit |
| Zinc, total [as Zn] | 4 | 5 | 1 | April 30, 2021 | 6% over the limit |
| Chloroform | 2 | 3 | 1 | August 31, 2007 | 4% over the limit |
| Chlorine, total residual | 1 | 2 | 1 | June 30, 2009 | 150% over the limit |
| Nitrogen, ammonia total [as N] | 2 | 1 | 1 | December 31, 2003 | 22% over the limit |
| Hexachlorobenzene | 4 | 8 | 0 | ||
| Benzo[a]pyrene | 2 | 6 | 0 | ||
| Benzo[a]anthracene | 2 | 6 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 4 | 4 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia | 4 | 4 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 4 | 4 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Menidia menidia | 4 | 4 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 4 | 4 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia | 4 | 4 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 4 | 4 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia | 4 | 4 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 4 | 4 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidia | 4 | 4 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 4 | 4 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidia | 4 | 4 | 0 | ||
| Carbon tetrachloride | 2 | 4 | 0 | ||
| 1,2-Dichloroethane | 2 | 4 | 0 | ||
| Toluene | 2 | 4 | 0 | ||
| Benzene | 2 | 4 | 0 | ||
| Acenaphthylene | 2 | 4 | 0 | ||
| Acenaphthene | 2 | 4 | 0 | ||
| Acrylonitrile | 2 | 4 | 0 | ||
| Anthracene | 2 | 4 | 0 | ||
| Benzo[b]fluoranthene | 2 | 4 | 0 | ||
| Benzo[k]fluoranthene | 2 | 4 | 0 | ||
| Chlorobenzene | 2 | 4 | 0 | ||
| Chrysene | 2 | 4 | 0 | ||
| Diethyl phthalate | 2 | 4 | 0 | ||
| Dimethyl phthalate | 2 | 4 | 0 | ||
| Ethylbenzene | 2 | 4 | 0 | ||
| Fluoranthene | 2 | 4 | 0 | ||
| Fluorene | 2 | 4 | 0 | ||
| Hexachlorobutadiene | 2 | 4 | 0 | ||
| Hexachloroethane | 2 | 4 | 0 | ||
| Methyl chloride [Chloromethane] | 2 | 4 | 0 | ||
| Methylene chloride | 2 | 4 | 0 | ||
| Nitrobenzene | 2 | 4 | 0 | ||
| Phenanthrene | 2 | 4 | 0 | ||
| Pyrene | 2 | 4 | 0 | ||
| Tetrachloroethylene | 2 | 4 | 0 | ||
| 1,1-Dichloroethane | 2 | 4 | 0 | ||
| 1,1-Dichloroethylene | 2 | 4 | 0 | ||
| 1,1,1-Trichloroethane | 2 | 4 | 0 | ||
| 1,1,2-Trichloroethane | 2 | 4 | 0 | ||
| 1,2-Dichlorobenzene | 2 | 4 | 0 |
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
- 4Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| March 19, 2026 | Permit Violations - Violation Specified in Comment | ST6 |
| April 30, 2024 | Permit Violations - Violation Specified in Comment | ST6 |
| October 8, 2021 | Permit Violations - Violation Specified in Comment | ST6 |
| January 10, 2018 | Permit Violations - Violation Specified in Comment | ST6 |
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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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.