PlainEnviro

EPA TRI Chemical

Vinyl Chloride

CAS Number: 75-01-4

Total releases
2.1M lbs
Number of facilities
40
Carcinogen
Yes
PBT substance
No
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Carcinogen

According to the EPA Toxics Release Inventory, Vinyl Chloride (CAS 75-01-4) is disclosed by 40 Form R facilities totaling 2.1M lbs of reported releases. The TRI extract marks this chemical with a carcinogen classification flag. TRI pounds are self-reported disclosure totals, not a measured public-health risk score.

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Vinyl Chloride (CAS 75-01-4) is a chemical tracked by the EPA Toxics Release Inventory (TRI) program under Section 313 of the Emergency Planning and Community Right-to-Know Act. The TRI requires industrial facilities above specified threshold quantities to disclose annual manufacturing, processing, and otherwise-used volumes, along with quantities released to air, water, land, and off-site transfers.

The carcinogen flag above reflects an assessment from EPA, the International Agency for Research on Cancer, or the National Toxicology Program, not a TRI-specific determination. The largest individual disclosure in the current dataset comes from FORMOSA PLASTICS CORP TEXAS in TX at 315.9K lbs.

TRI volumes are self-reported estimates, not measured stack emissions, and each pound counts equally regardless of chemical toxicity, so total pounds should not be equated with total risk. Inclusion of a chemical or facility in the TRI does not itself establish a health hazard; it documents the public right-to-know record. Consult EPA's IRIS (Integrated Risk Information System) and the Agency for Toxic Substances and Disease Registry for health-effect summaries.

AIR pathway mix

Vinyl Chloride: how the 2.1M lbs splits

2.1M lbs across all reported pathways

  • Air Releases2.1M lbs99.9%
  • Off-site Transfers2.5K lbs0.1%
  • Water Discharges210 lbs<0.1%
  • Land Disposal0 lbs<0.1%

Vinyl Chloride's 2.1M lbs Form-R total is AIR, with air releases making up 99.9% of the bar. Next segment: off-site transfers at 0.1%.

Trend & Where It's Reported

Reported Release Trend

Between 2019 and 2023, cumulative annual Vinyl Chloride releases across all reporting facilities decreased by 24% (421.4K lbs → 318.5K lbs). Year-to-year swings reflect facility openings/closures and reporting changes as much as underlying activity.

Geographic Concentration

Reporting for Vinyl Chloride is concentrated: Texas accounts for 33.4% of the reported total (12 facilities). Next: Louisiana.

  • Texas 704.2K lbs
  • Louisiana 616.3K lbs
  • Kentucky 476.8K lbs
  • New Jersey 105.8K lbs
  • Mississippi 101.8K lbs
Industry Sources

Reporting for Vinyl Chloride is highly concentrated by industry: Chemicals facilities account for 96.1% of the reported total (29 facilities). Next: Electric Utilities.

  • Chemicals 2.0M lbs
  • Electric Utilities 81.5K lbs
  • Plastics and Rubber 1.1K lbs
  • Hazardous Waste 575 lbs
  • Nonmetallic Mineral Product 0 lbs

Which facilities release the most of this chemical?

Facilities with the largest reported releases of Vinyl Chloride. Up to 50 shown.

# Facility Release (lbs)
1 Formosa Plastics Corp Texas
315.9K lbs
2 Westlake Vinyls Inc. - Pvc Plant
259.5K lbs
3 Westlake Vinyls Inc
212.1K lbs
4 Westlake Vinyls Co
137.1K lbs
5 Mexichem Specialty Resins Inc
105.6K lbs
6 Westlake Chemicals & Vinyls LLC
101.8K lbs
7 Shintech Inc
94.0K lbs
8 Mexichem Specialty Resins Inc
93.7K lbs
9 Westlake Chemicals & Vinyls LLC
90.6K lbs
10 Formosa Plastics Corp Louisiana
85.0K lbs
11 Oxy Vinyls LP Pasadena Pvc Plant
83.2K lbs
12 Shintech Plaquemine Plant
83.0K lbs
13 Shintech Louisiana LLC - Addis Plant A
81.7K lbs
14 Westlake US 2 LLC
81.5K lbs
15 Occidental Chemical Corp
77.2K lbs
16 Oxy Vinyls LP Deer Park Caustic
55.0K lbs
17 Westlake Chemicals & Vinyls LLC
42.7K lbs
18 Oxy Vinyls LP la Porte Vcm Plant
35.1K lbs
19 Oxy Vinyls LP
22.6K lbs
20 Oxy Vinyls LP Deer Park-Vcm Plant
19.1K lbs
21 Freeport_olin Bc
13.8K lbs
22 Occidental Chemical Holding Corp - Geismar Plant
13.4K lbs
23 Daikin America Inc
9.4K lbs
24 The Chemours Co
5.4K lbs
25 Lubrizol Advanced Materials Inc
5.2K lbs
26 Corteva Freeport Operations
4.9K lbs
27 Lacc LLC Us/lotte Chemical Louisiana LLC
1.3K lbs
28 Basf Corp - Hannibal Site
941 lbs
29 Spartech Llc.
750 lbs
30 Clean Harbors Deer Park LLC
389 lbs
31 Rowmark Custom Laminations
341 lbs
32 Huntsman Ethyleneamines Plant
231 lbs
33 Clean Harbors el Dorado LLC
161 lbs
34 Mexichem Specialty Resins Inc
54 lbs
35 Clean Harbors Environmental Services Inc
25 lbs
36 Clean Harbors Aragonite LLC
0 lbs
37 Heritage Thermal Services
0 lbs
38 Ross Incineration Services Inc
0 lbs
39 Norlite LLC
0 lbs
40 Achilles USA Inc
0 lbs

Frequently Asked Questions

What is Vinyl Chloride in the EPA TRI? ▼
Vinyl Chloride (CAS Number: 75-01-4) is a chemical tracked by the EPA Toxic Release Inventory (TRI) program. The TRI extract marks it with a carcinogen classification flag based on EPA/IARC/NTP listings. 40 facilities in the United States report releasing this chemical to the EPA.
How much Vinyl Chloride is disclosed in U.S. TRI filings? ▼
U.S. facilities have reported a total of 2.1M lbs of Vinyl Chloride releases to the EPA Toxic Release Inventory across 40 facilities. Release quantities are self-reported estimates covering air, water, land, and off-site transfers. They are disclosure totals, not toxicity-weighted harm scores.
How does EPA TRI classify Vinyl Chloride? ▼
Vinyl Chloride carries a carcinogen classification flag in the TRI database (drawn from EPA, IARC, or NTP listings). TRI classification flags document inventory listing status; they are not a site-specific exposure or health diagnosis. For health-effect summaries see EPA IRIS and ATSDR toxicological profiles.
Which facilities disclose the most Vinyl Chloride? ▼
Formosa Plastics Corp Texas in TX reports the largest disclosed release of Vinyl Chloride in this dataset, at 315.9K lbs. Most reporting facilities for this chemical fall under chemicals. Release data is self-reported annually to the EPA under the TRI program. View the full list of 40 facilities on this page.
What is the CAS number for Vinyl Chloride? ▼
The CAS (Chemical Abstracts Service) Registry Number for Vinyl Chloride is 75-01-4. CAS numbers are unique numerical identifiers assigned to every chemical substance described in the open scientific literature. This identifier is used to search scientific databases and regulatory filings.

Related Guides

Understanding TRI Data
How the Toxic Release Inventory works
Biggest Polluters in America
Which facilities release the most toxics
How to Check Environmental Quality
Step-by-step guide to checking your local environment

Health Information

Carcinogen Classification: This chemical is classified as a known or suspected carcinogen by the EPA under the Toxic Release Inventory program. This classification is based on evaluations by agencies including the International Agency for Research on Cancer (IARC), the National Toxicology Program (NTP), and the EPA itself.

Data comes from the EPA Toxic Release Inventory (TRI) program. Release quantities are self-reported by facilities and may represent estimates. The total shown aggregates reports across all facilities and reporting years.

PlainEnviro presents this data without advocacy framing. The presence of a chemical in the TRI database does not by itself indicate a health risk at current exposure levels. For health-related questions about specific chemical exposures, consult your local health agency or a toxicologist.

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Data sourced from the U.S. Environmental Protection Agency (EPA). See our methodology for details. Retrieved and formatted by PlainEnviro

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the EPA Toxic Release Inventory (TRI). Consult a qualified professional before making decisions based on this data.

Read our methodology - how this data is sourced, computed, and verified.