PlainEnviro

EPA TRI Chemical

1,1,2,2-Tetrachloroethane

CAS Number: 79-34-5

Total releases
89.0K lbs
Number of facilities
29
Carcinogen
Yes
PBT substance
No
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Carcinogen

According to the EPA Toxics Release Inventory, 1,1,2,2-Tetrachloroethane (CAS 79-34-5) is disclosed by 29 Form R facilities totaling 89.0K 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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1,1,2,2-Tetrachloroethane (CAS 79-34-5) 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 75.3K 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.

OFFSITE pathway mix

1,1,2,2-Tetrachloroethane: how the 89.0K lbs splits

89.0K lbs across all reported pathways

  • Off-site Transfers76.3K lbs85.7%
  • Air Releases12.6K lbs14.1%
  • Land Disposal115 lbs0.1%

1,1,2,2-Tetrachloroethane's 89.0K lbs Form-R total is OFFSITE, with off-site transfers making up 85.7% of the bar. Next segment: air releases at 14.1%.

Trend & Where It's Reported

Reported Release Trend

Between 2019 and 2023, cumulative annual 1,1,2,2-Tetrachloroethane releases across all reporting facilities decreased by 80% (65.9K lbs → 13.4K lbs). Year-to-year swings reflect facility openings/closures and reporting changes as much as underlying activity.

Geographic Concentration

Reporting for 1,1,2,2-Tetrachloroethane is highly concentrated: Texas accounts for 89.6% of the reported total (9 facilities). Next: Louisiana.

  • Texas 79.8K lbs
  • Louisiana 6.9K lbs
  • Kentucky 2.1K lbs
  • Kansas 115 lbs
  • Missouri 102 lbs
Industry Sources

Reporting for 1,1,2,2-Tetrachloroethane is highly concentrated by industry: Chemicals facilities account for 95.5% of the reported total (16 facilities). Next: Electric Utilities.

  • Chemicals 85.1K lbs
  • Electric Utilities 3.5K lbs
  • Hazardous Waste 336 lbs
  • Nonmetallic Mineral Product 109 lbs

Which facilities release the most of this chemical?

Facilities with the largest reported releases of 1,1,2,2-Tetrachloroethane. Up to 50 shown.

# Facility Release (lbs)
1 Formosa Plastics Corp Texas
75.3K lbs
2 Freeport_olin Bc
3.8K lbs
3 Westlake US 2 LLC
3.5K lbs
4 Westlake Vinyls Co
2.1K lbs
5 Westlake Vinyls Inc
1.9K lbs
6 Blue Cube Operations LLC - Plaquemine Site
415 lbs
7 Occidental Chemical Holding Corp - Geismar Plant
301 lbs
8 Westlake Chemicals & Vinyls LLC
267 lbs
9 Westlake Chemicals & Vinyls LLC
207 lbs
10 Dow Chemical Co Freeport Facility
200 lbs
11 Safety-Kleen Systems Inc.
179 lbs
12 Veolia Es Technical Solutions LLC Port Arthur Facility
147 lbs
13 Oxy Vinyls LP la Porte Vcm Plant
116 lbs
14 Occidental Chemical Corp
115 lbs
15 Oxy Vinyls LP Deer Park-Vcm Plant
113 lbs
16 Buzzi Unicem Usa-Cape Girardeau
102 lbs
17 Formosa Plastics Corp Louisiana
95 lbs
18 Shintech Plaquemine Plant
60 lbs
19 Occidental Chemical Corp
41 lbs
20 Harrell Industries Inc
15 lbs
21 Norlite LLC
5 lbs
22 Clean Harbors Deer Park LLC
3 lbs
23 Clean Harbors Aragonite LLC
3 lbs
24 Ash Grove Cement
2 lbs
25 Veolia N.a. Inc.
2 lbs
26 Clean Harbors el Dorado LLC
1 lbs
27 Heritage Thermal Services
1 lbs
28 Arcwood Environmental - Orange LLC
0 lbs
29 Ross Incineration Services Inc
0 lbs

Frequently Asked Questions

What is 1,1,2,2-Tetrachloroethane in the EPA TRI? ▼
1,1,2,2-Tetrachloroethane (CAS Number: 79-34-5) 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. 29 facilities in the United States report releasing this chemical to the EPA.
How much 1,1,2,2-Tetrachloroethane is disclosed in U.S. TRI filings? ▼
U.S. facilities have reported a total of 89.0K lbs of 1,1,2,2-Tetrachloroethane releases to the EPA Toxic Release Inventory across 29 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 1,1,2,2-Tetrachloroethane? ▼
1,1,2,2-Tetrachloroethane 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 1,1,2,2-Tetrachloroethane? ▼
Formosa Plastics Corp Texas in TX reports the largest disclosed release of 1,1,2,2-Tetrachloroethane in this dataset, at 75.3K 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 29 facilities on this page.
What is the CAS number for 1,1,2,2-Tetrachloroethane? ▼
The CAS (Chemical Abstracts Service) Registry Number for 1,1,2,2-Tetrachloroethane is 79-34-5. 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.

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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.