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
- 1Inspections on file
- 0Formal enforcement actions
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.
LYONDELLBASSELL SYNGAS, La Porte, Texas: Individual permit TX0118389, held by LYONDELLBASELL ACETYLS LLC; Administratively continued (past its expiration date and still in force until reissued); issued November 15, 2017, term to October 1, 2021; discharges to SAN JACINTO BAY.
- Solids, total suspended: 8 limits, 35 violations of any kind, 27 effluent exceedances, latest July 31, 2021, largest 610% over the limit.
- Copper, total [as Cu]: 10 limits, 53 violations of any kind, 25 effluent exceedances, latest March 31, 2022, largest 397% over the limit.
- pH: 4 limits, 44 violations of any kind, 24 effluent exceedances, latest March 31, 2023.
- BOD, carbonaceous [5 day, 20 C]: 0 limits, 24 violations of any kind, 24 effluent exceedances, latest April 30, 2017, largest 673% over the limit.
- Zinc, total [as Zn]: 10 limits, 42 violations of any kind, 16 effluent exceedances, latest February 28, 2018, largest 180% over the limit.
- Carbon, tot organic [TOC]: 3 limits, 25 violations of any kind, 15 effluent exceedances, latest December 31, 2025, largest 1,181% over the limit.
- BOD, 5-day, 20 deg. C: 8 limits, 12 violations of any kind, 10 effluent exceedances, latest January 31, 2023, largest 13,342% over the limit.
- pH range excursions, > 60 minutes: 1 limit, 9 violations of any kind, 4 effluent exceedances, latest January 31, 2024, largest 2,147,483,650% over the limit.
- Chlorine, total residual: 2 limits, 6 violations of any kind, 4 effluent exceedances, latest September 30, 2015, largest 143% over the limit.
- Nitrogen, ammonia total [as N]: 0 limits, 2 violations of any kind, 2 effluent exceedances, latest January 31, 2016, largest 35% over the limit.
- Oil & Grease: 1 limit, 7 violations of any kind, 1 effluent exceedance, latest July 31, 2026, largest 237% over the limit.
- Temperature, water deg. fahrenheit: 1 limit, 3 violations of any kind, 1 effluent exceedance, latest March 31, 2018, largest 10% over the limit.
- Silver, total [as Ag]: 6 limits, 24 violations of any kind, 0 effluent exceedances.
- Flow, in conduit or thru treatment plant: 8 limits, 18 violations of any kind, 0 effluent exceedances.
- LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia): 2 limits, 9 violations of any kind, 0 effluent exceedances.
- LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidia: 2 limits, 9 violations of any kind, 0 effluent exceedances.
- Nickel, total [as Ni]: 8 limits, 8 violations of any kind, 0 effluent exceedances.
- LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidia: 2 limits, 7 violations of any kind, 0 effluent exceedances.
- LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia): 2 limits, 7 violations of any kind, 0 effluent exceedances.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia: 2 limits, 6 violations of any kind, 0 effluent exceedances.
- pH range excursions, monthly total accum: 1 limit, 6 violations of any kind, 0 effluent exceedances.
- Whole effluent toxicity - retest #2: 3 limits, 5 violations of any kind, 0 effluent exceedances.
- Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia: 2 limits, 5 violations of any kind, 0 effluent exceedances.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia): 2 limits, 4 violations of any kind, 0 effluent exceedances.
- NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia): 2 limits, 4 violations of any kind, 0 effluent exceedances.
- NOEC Lethal Static Renewal 7 Day Chronic Menidia menidia: 2 limits, 4 violations of any kind, 0 effluent exceedances.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia): 2 limits, 4 violations of any kind, 0 effluent exceedances.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia: 2 limits, 4 violations of any kind, 0 effluent exceedances.
- Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia): 2 limits, 4 violations of any kind, 0 effluent exceedances.
- LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia): 1 limit, 4 violations of any kind, 0 effluent exceedances.
- LC50 Pass/Fail Static 24Hr Acute Menidia menidia: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Whole effluent toxicity - retest #1: 3 limits, 3 violations of any kind, 0 effluent exceedances.
- Benzidine: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Enterococci: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Hexachlorobenzene: 8 limits, 0 violations of any kind, 0 effluent exceedances.
- Carbon tetrachloride: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- 1,2-Dichloroethane: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Chloroform: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Toluene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Benzene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Acenaphthylene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Acenaphthene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Acrylonitrile: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Anthracene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Benzo[k]fluoranthene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Benzo[a]pyrene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Chlorobenzene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Chrysene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Diethyl phthalate: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Dimethyl phthalate: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Ethylbenzene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Fluoranthene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Fluorene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Hexachlorobutadiene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Hexachloroethane: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Methyl chloride [Chloromethane]: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Methylene chloride: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Nitrobenzene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Phenanthrene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Pyrene: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- March 3, 2026: Evaluation (S).
LYONDELLBASSELL SYNGAS among its neighbors
EPA’s permit file holds 112 discharge permits in the Goose Creek-Frontal Galveston Bay subwatershed (HUC 120401040706), TX0118389 among them. Its county holds 4,455, 195 of them major permits; TX0118389 is a minor permit.
Other permits in the Goose Creek-Frontal Galveston Bay subwatershed (HUC 120401040706)
- AIR LIQUIDE BAYTOWN ASU FACILITY, Baytown: TXR1583VZ, minor permit, discharging to BURNET BAY, permit term to March 4, 2028
- AIR PRODUCTS LA PORTE PLANT, La Porte: TX0004944, minor permit, discharging to DRAINAGE DITCH;HCFCD F103-00-00;SAN JACINTO BAY, permit term to July 12, 2023
- AIR PRODUCTS LA PORTE PLANT, La Porte: TXR1595PW, minor permit, permit term to March 4, 2028
- AIRGAS DRY ICE FACILITY, La Porte: TX0136638, minor permit, discharging to San Jacinto Bay, permit term to March 31, 2024
- BARBOURS CUT TERMINAL, La Porte: TXR05GM41, minor permit, permit term to August 13, 2026
- BATTLEGROUND CHLOR ALKALI PLANT, La Porte: TX0008150, major permit, discharging to SEG 1005 SAN JACINTO RIVER BASIN, permit term to July 1, 2020
- BATTLEGROUND ROAD FACILITY, La Porte: TX0077585, minor permit, discharging to DRAINAGE DITCH;TIDAL RD;TUCKER BAYO, permit term to May 1, 2013
- BAYTOWN ACE INDUSTRIAL SERVICES, Baytown: TXR05FO27, minor permit, permit term to August 13, 2026
- BAYTOWN CENTRAL, Baytown: TXR1557NT, minor permit, discharging to CARY BAYOU, permit term to March 4, 2028
- BAYTOWN FIRE STATION NO 2, Baytown: TXR1552XS, minor permit, discharging to GOOSE CREEK TIDAL, permit term to March 4, 2028
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) |
| Other EPA IDs (FRS) | ICIS-AIR source TX0000004820101503 |
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 |
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES TX0118389.
Inspections
| Date | What EPA recorded | Agency |
|---|---|---|
| March 3, 2026 | Evaluation | S |
Formal enforcement and penalties
0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.
Informal enforcement
EPA’s informal enforcement file holds no action for NPDES TX0118389.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.