Non-Compliance
TRI Reporter
Clean Air Act
Clean Water Act
RCRA
WESTLAKE CHEMICALS & VINYLS LLC
Quick Summary
- •Released 18,394 lbs of toxic chemicals to the environment in the most recent TRI reporting year.
- •Currently out of compliance in at least one environmental program (CAA, CWA, or RCRA).
- •Assessed $340,000 in total penalties since records began.
- •Reports releases of chemicals classified as known or probable carcinogens.
- Address
-
715 HWY 25 SOUTH
ABERDEEN, MS 39730
View on map ↗ - County
- MONROE County
- Industry
- Manufacturing
- NAICS (North American Industry Classification)
- 325211
- Inspections
- 14 · last Sep 24, 2025
- Total Penalties
- $340,000 · last Nov 18, 2024
- Registry ID
- 110012665990
How This Compares
#79
of 306 TRI reporters in MS
#2,953
of 16,877 TRI reporters in Manufacturing
Ranked by most recent year's total TRI releases.
Compliance Status (Last 12 Quarters)
Number of calendar quarters, out of the last 12, in which this facility was in violation of its permit. Zero means no recorded violations in that program over the past three years.
7
Air (CAA)
Qtrs Non-Compliant
Qtrs Non-Compliant
1
Water (CWA)
Qtrs Non-Compliant
Qtrs Non-Compliant
0
Hazardous Waste (RCRA)
Qtrs Non-Compliant
Qtrs Non-Compliant
TRI Toxic Chemical Releases
Annual pounds of each toxic chemical released to air, water, and land, as reported to the EPA Toxic Release Inventory. Carcinogen (♦) and PFAS designations are per EPA and IARC classifications.
Emissions Trend (2015–2024)
-12% overall
| Year | Total Releases (lbs) | vs Prior Year |
|---|---|---|
| 2015 | 18,797 | — |
| 2016 | 19,027 | +1% |
| 2017 | 18,394 | -3% |
| 2018 | 20,337 | +11% |
| 2020 | 18,036 | — |
| 2021 | 14,158 | -21% |
| 2022 | 73,180 | +417% |
| 2023 | 13,757 | -81% |
| 2024 | 16,536 | +20% |
2024
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Cumene | — | — | — | — | — | ♦ Carcinogen |
| Zinc compounds | — | — | — | — | — | |
| Vinyl chloride | 8,514 | 8,514 | — | — | — | ♦ Carcinogen |
| Methanol | 6,902 | 6,902 | — | — | — | |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 574 | 574 | — | — | — | |
| Phthalic anhydride | 509 | 509 | — | — | 106 | |
| Chlorine | 22 | 22 | — | — | — | |
| Antimony compounds | 15 | 15 | — | — | 563 | |
| Dioxin and dioxin-like compounds | 0 | 0 | — | — | 1 | ♦ Carcinogen |
2023
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Zinc compounds | — | — | — | — | — | |
| Cumene | — | — | — | — | — | ♦ Carcinogen |
| Vinyl chloride | 8,623 | 8,623 | — | — | — | ♦ Carcinogen |
| Methanol | 3,988 | 3,988 | — | — | — | |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 573 | 573 | — | — | — | |
| Phthalic anhydride | 542 | 542 | — | — | 509 | |
| Chlorine | 20 | 20 | — | — | — | |
| Antimony compounds | 11 | 11 | — | — | 621 | |
| Dioxin and dioxin-like compounds | 0 | 0 | — | — | 1 | ♦ Carcinogen |
2022
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | — | — | — | — | — | |
| Cumene | — | — | — | — | — | ♦ Carcinogen |
| Antimony compounds | — | — | — | — | — | |
| Vinyl chloride | 70,077 | 70,077 | — | — | 0 | ♦ Carcinogen |
| Methanol | 1,825 | 1,825 | — | — | — | |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 573 | 573 | — | — | — | |
| Chlorine | 373 | 373 | — | — | — | |
| Phthalic anhydride | 332 | 332 | — | — | 12,545 | |
| Dioxin and dioxin-like compounds | 0 | 0 | — | — | 1 | ♦ Carcinogen |
2021
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | — | — | — | — | — | |
| Cumene | — | — | — | — | — | ♦ Carcinogen |
| Antimony compounds | — | — | — | — | — | |
| Vinyl chloride | 4,779 | 4,779 | — | — | — | ♦ Carcinogen |
| Phthalic anhydride | 3,352 | 3,352 | — | — | 7,857 | |
| Methanol | 2,431 | 2,431 | — | — | 11 | |
| Chlorine | 1,919 | 1,919 | — | — | — | |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 1,677 | 1,677 | — | — | — | |
| Dioxin and dioxin-like compounds | 0 | 0 | — | — | 0 | ♦ Carcinogen |
2020
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Antimony compounds | — | — | — | — | — | |
| Cumene | — | — | — | — | — | ♦ Carcinogen |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | — | — | — | — | — | |
| Vinyl chloride | 8,727 | 8,727 | — | — | — | ♦ Carcinogen |
| Phthalic anhydride | 3,352 | 3,352 | — | — | — | |
| Methanol | 2,431 | 2,431 | — | — | — | |
| Chlorine | 1,945 | 1,945 | — | — | — | |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 1,581 | 1,581 | — | — | — | |
| Dioxin and dioxin-like compounds | 0 | 0 | — | — | 1 | ♦ Carcinogen |
2018
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | — | — | — | — | — | |
| Antimony compounds | — | — | — | — | — | |
| Cumene | — | — | — | — | — | ♦ Carcinogen |
| Vinyl chloride | 11,204 | 11,204 | — | — | — | ♦ Carcinogen |
| Phthalic anhydride | 3,352 | 3,352 | — | — | — | |
| Methanol | 2,431 | 2,431 | — | — | 11 | |
| Chlorine | 1,963 | 1,963 | — | — | — | |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 1,387 | 1,387 | — | — | — | |
| Dioxin and dioxin-like compounds | 0 | 0 | — | — | 0 | ♦ Carcinogen |
2017
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | — | — | — | — | — | |
| Antimony compounds | — | — | — | — | — | |
| Cumene | — | — | — | — | — | ♦ Carcinogen |
| Vinyl chloride | 9,286 | 9,286 | — | — | — | ♦ Carcinogen |
| Phthalic anhydride | 3,352 | 3,352 | — | — | 2,120 | |
| Methanol | 2,431 | 2,431 | — | — | 11 | |
| Chlorine | 1,938 | 1,938 | — | — | — | |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 1,387 | 1,387 | — | — | — | |
| Dioxin and dioxin-like compounds | 0 | 0 | — | — | 0 | ♦ Carcinogen |
2016
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Cumene | — | — | — | — | — | ♦ Carcinogen |
| Antimony compounds | — | — | — | — | — | |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | — | — | — | — | — | |
| Vinyl chloride | 9,902 | 9,902 | — | — | — | ♦ Carcinogen |
| Phthalic anhydride | 3,352 | 3,352 | — | — | 240 | |
| Methanol | 2,431 | 2,431 | — | — | 11 | |
| Chlorine | 1,955 | 1,955 | — | — | — | |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 1,387 | 1,387 | — | — | — | |
| Dioxin and dioxin-like compounds | 0 | 0 | — | — | 0 | ♦ Carcinogen |
2015
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Cumene | — | — | — | — | — | ♦ Carcinogen |
| Antimony compounds | — | — | — | — | — | |
| Vinyl chloride | 10,292 | 10,292 | — | — | — | ♦ Carcinogen |
| Phthalic anhydride | 3,352 | 3,352 | — | — | 3,236 | |
| Chlorine | 1,941 | 1,941 | — | — | — | |
| Methanol | 1,825 | 1,825 | — | — | 4 | |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 1,387 | 1,387 | — | — | — | |
| Dioxin and dioxin-like compounds | 0 | 0 | — | — | 0 | ♦ Carcinogen |
Waste Management & Recycling
How this facility manages toxic chemicals beyond direct releases — through recycling, energy recovery, and on-site or off-site treatment. Data from the most recent TRI reporting year. Quantities in pounds.
| Chemical | Released | Recycled | Energy Recovery | Treated |
|---|---|---|---|---|
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | — | — | — | 271,743 |
| Chlorine | — | — | — | 176,323 |
| Methanol | — | — | — | 22,627 |
| Dioxin and dioxin-like compounds | — | — | — | 1 |
| Vinyl chloride | — | — | — | 466,278 |
| Phthalic anhydride | — | — | — | 106 |
Off-Site Transfer Destinations
Facilities to which toxic chemicals were transferred for disposal, recycling, energy recovery, or treatment during the most recent TRI reporting year. Quantities in pounds.
| Destination | Chemical | Disposal | Recycling | Energy Rec. | Treatment |
|---|---|---|---|---|---|
|
PRAIRIE BLUFF LANDFILL
HOUSTON, MS
|
Antimony compounds | 563 | — | — | — |
|
CLEAN HARBORS DEER PARK
LA PORTE, TX
|
Phthalic anhydride | — | — | — | 106 |
Transfers to Publicly-Owned Treatment Works (POTWs)
Toxic chemicals transferred to municipal wastewater treatment plants during the most recent TRI reporting year. Quantities in pounds.
| Chemical | Transferred (lbs) | POTW |
|---|---|---|
| Methanol | — | ABERDEEN EAST WWTP, ABERDEEN |
| Dioxin and dioxin-like compounds | 1 | ABERDEEN EAST WWTP, ABERDEEN |
Compliance Violations
Individual permit violations recorded by the EPA across air, water, and hazardous waste programs. Open violations are unresolved as of the most recent ECHO data update.
| Program | Type | Violation Date | Return to Compliance | Status |
|---|---|---|---|---|
| caa | Linked to Viol. Below | — | — | Open |
| caa | Linked to Viol. Below | — | — | Open |
| caa | Linked to Viol. Below | — | — | Open |
| caa | Linked to Viol. Below | — | — | Open |
| caa | Linked to Viol. Below | — | — | Open |
| caa | Linked to Viol. Below | — | — | Open |
| caa | Linked to Viol. Below | — | — | Open |
| caa | Linked to Viol. Below | — | — | Open |
| caa | Linked to Viol. Below | — | — | Open |
| caa | Linked to Viol. Below | — | — | Open |
| caa | Linked to Viol. Below | — | — | Open |
| caa | Linked to Viol. Below | — | — | Open |
| caa | Linked to Viol. Below | — | — | Open |
| caa | Linked to Viol. Below | — | — | Open |
| caa | Linked to Viol. Below | — | — | Open |
| caa | Linked to Viol. Below | — | — | Open |
| caa | Linked to Viol. Below | — | — | Open |
| caa | Linked to Viol. Below | — | — | Open |
| caa | Linked to Viol. Below | — | — | Open |
| caa | Linked to Viol. Below | — | — | Open |
| caa | Linked to Viol. Below | — | — | Open |
| caa | Linked to Viol. Below | — | — | Open |
| caa | Linked to Viol. Below | — | — | Open |
| caa | Linked to Viol. Below | — | — | Open |
| caa | Linked to Viol. Below | — | — | Open |
| caa | Linked to Viol. Below | — | — | Open |
| caa | HPV | Mar 7, 2023 | Dec 13, 2024 | Resolved |
| rcra | Standards Applicable to Generators of HW: General | Aug 23, 2004 | Feb 28, 2008 | Resolved |
| rcra | Standards Applicable to Generators of HW: General | Jun 20, 2002 | Jun 28, 2002 | Resolved |
| rcra | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | Jun 20, 2002 | Jun 28, 2002 | Resolved |
| rcra | Standards Applicable to Generators of HW: General | Jun 6, 1999 | Jul 21, 1999 | Resolved |
| rcra | Standards Applicable to Generators of HW: General | Jan 16, 1997 | Jan 16, 1997 | Resolved |
| rcra | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | Jan 16, 1997 | May 1, 1997 | Resolved |
| rcra | Land Disposal Restrictions: General | Jan 16, 1997 | Jan 16, 1997 | Resolved |
Discharge Limit Exceedances
Instances where this facility's reported discharge monitoring results exceeded its permitted limits under the Clean Water Act. Exceedance percentage shows how far over the permit limit the discharge was.
| Pollutant | Violation | Reported | Limit | Exceedance | Period | Status |
|---|---|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | DMR, Limited - Numeric Violation | 67.00 mg/L | 60.00 | +12% | Jun 2025 | Open |
Enforcement Actions
Formal enforcement cases brought by the EPA or state agencies, including administrative orders and civil penalties assessed. Penalty amounts reflect what was formally assessed, not necessarily what was collected.
Administrative - Formal
Clean Air Act
· Case 3604202177 · Nov 18, 2024
$340,000
Notice of Violation
Clean Air Act
· Case 3603834588 · Oct 26, 2023
Notice of Violation
Clean Air Act
· Case 3603755348 · Aug 16, 2023
Notice of Violation
Clean Air Act
· Case 3603532650 · Mar 6, 2023
Administrative - Formal
· Case 04-2018-2518 · Sep 11, 2018
$39,670
Administrative - Formal
· Case 04-2008-2035 · Jul 22, 2008
$2,620
FINAL CIVIL JUDICIAL ACTION FOR COMPLIANCE AND/OR MONETARY PENALTY
RCRA (Hazardous Waste)
· Case RCRA-MSD007031230-001 · Feb 28, 2008
$305,000
Judicial
· Case 04-2005-9001 · Feb 28, 2008
$610,000
Administrative - Formal
· Case 04-2000-0292 · May 2, 2000
WRITTEN INFORMAL
RCRA (Hazardous Waste)
· Case RCRA-MSD007031230-000 · Jul 14, 1999
Judicial
· Case 04-1980-0012 · Aug 19, 1985
$100,000
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