Clean Water Act discharge permit · NPDES TX0118389
LYONDELLBASSELL SYNGAS, La Porte, TX: NPDES TX0118389 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 88Pollutants under a numeric limit
- 12Pollutants with an effluent exceedance
LYONDELLBASSELL SYNGAS, held by LYONDELLBASELL ACETYLS LLC, holds NPDES permit TX0118389, which discharges to San Jacinto Bay. EPA’s file records it issued November 15, 2017 and expiring October 1, 2021. 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 filed | LYONDELLBASSELL SYNGAS |
|---|---|
| Permittee as filed | LYONDELLBASELL ACETYLS LLC |
| NPDES ID | TX0118389 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | November 15, 2017 |
| Expiration date | October 1, 2021 |
| Address | La Porte, TX 77571 |
| Receiving water | SAN JACINTO BAY |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Goose Creek-Frontal Galveston Bay (HUC 120401040706) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 90Pollutants on file
- 88Under a numeric limit
- 34With a violation of any kind
- 12With 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 90 are shown.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Solids, total suspended | 8 | 35 | 27 | July 31, 2021 | 610% over the limit |
| Copper, total [as Cu] | 10 | 53 | 25 | March 31, 2022 | 397% over the limit |
| pH | 4 | 44 | 24 | March 31, 2023 | |
| BOD, carbonaceous [5 day, 20 C] | 0 | 24 | 24 | April 30, 2017 | 673% over the limit |
| Zinc, total [as Zn] | 10 | 42 | 16 | February 28, 2018 | 180% over the limit |
| Carbon, tot organic [TOC] | 3 | 25 | 15 | December 31, 2025 | 1,181% over the limit |
| BOD, 5-day, 20 deg. C | 8 | 12 | 10 | January 31, 2023 | 13,342% over the limit |
| pH range excursions, > 60 minutes | 1 | 9 | 4 | January 31, 2024 | 2,147,483,650% over the limit |
| Chlorine, total residual | 2 | 6 | 4 | September 30, 2015 | 143% over the limit |
| Nitrogen, ammonia total [as N] | 0 | 2 | 2 | January 31, 2016 | 35% over the limit |
| Oil & Grease | 1 | 7 | 1 | July 31, 2026 | 237% over the limit |
| Temperature, water deg. fahrenheit | 1 | 3 | 1 | March 31, 2018 | 10% over the limit |
| Silver, total [as Ag] | 6 | 24 | 0 | ||
| Flow, in conduit or thru treatment plant | 8 | 18 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 2 | 9 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidia | 2 | 9 | 0 | ||
| Nickel, total [as Ni] | 8 | 8 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidia | 2 | 7 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 2 | 7 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia | 2 | 6 | 0 | ||
| pH range excursions, monthly total accum | 1 | 6 | 0 | ||
| Whole effluent toxicity - retest #2 | 3 | 5 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia | 2 | 5 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 2 | 4 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 2 | 4 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Menidia menidia | 2 | 4 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 2 | 4 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia | 2 | 4 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 2 | 4 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | 1 | 4 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute Menidia menidia | 1 | 4 | 0 | ||
| Whole effluent toxicity - retest #1 | 3 | 3 | 0 | ||
| Benzidine | 1 | 3 | 0 | ||
| Enterococci | 2 | 2 | 0 | ||
| Hexachlorobenzene | 8 | 0 | 0 | ||
| Carbon tetrachloride | 4 | 0 | 0 | ||
| 1,2-Dichloroethane | 4 | 0 | 0 | ||
| Chloroform | 4 | 0 | 0 | ||
| Toluene | 4 | 0 | 0 | ||
| Benzene | 4 | 0 | 0 | ||
| Acenaphthylene | 4 | 0 | 0 | ||
| Acenaphthene | 4 | 0 | 0 | ||
| Acrylonitrile | 4 | 0 | 0 | ||
| Anthracene | 4 | 0 | 0 | ||
| Benzo[k]fluoranthene | 4 | 0 | 0 | ||
| Benzo[a]pyrene | 4 | 0 | 0 | ||
| Chlorobenzene | 4 | 0 | 0 | ||
| Chrysene | 4 | 0 | 0 | ||
| Diethyl phthalate | 4 | 0 | 0 | ||
| Dimethyl phthalate | 4 | 0 | 0 | ||
| Ethylbenzene | 4 | 0 | 0 | ||
| Fluoranthene | 4 | 0 | 0 | ||
| Fluorene | 4 | 0 | 0 | ||
| Hexachlorobutadiene | 4 | 0 | 0 | ||
| Hexachloroethane | 4 | 0 | 0 | ||
| Methyl chloride [Chloromethane] | 4 | 0 | 0 | ||
| Methylene chloride | 4 | 0 | 0 | ||
| Nitrobenzene | 4 | 0 | 0 | ||
| Phenanthrene | 4 | 0 | 0 | ||
| Pyrene | 4 | 0 | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES TX0118389.
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 September 15, 2026.