PlainEnviro

EPA TRI Chemical

1,1,2-Trichloroethane

CAS Number: 79-00-5

Total releases
265.3K lbs
Number of facilities
29
Carcinogen
No
PBT substance
No
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According to the EPA Toxics Release Inventory, 1,1,2-Trichloroethane (CAS 79-00-5) is disclosed by 29 Form R facilities totaling 265.3K lbs of reported releases. TRI pounds are self-reported disclosure totals, not a measured public-health risk score.

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1,1,2-Trichloroethane (CAS 79-00-5) 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.

A carcinogen flag, when present on other chemicals in this database, reflects an assessment from EPA, IARC, or the National Toxicology Program rather than a TRI-specific determination. The largest individual disclosure in the current dataset comes from FORMOSA PLASTICS CORP TEXAS in TX at 138.3K 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.

MIXED pathway mix

1,1,2-Trichloroethane: how the 265.3K lbs splits

265.3K lbs across all reported pathways

  • Off-site Transfers149.2K lbs56.3%
  • Air Releases115.8K lbs43.7%
  • Water Discharges215 lbs0.1%
  • Land Disposal6 lbs<0.1%

1,1,2-Trichloroethane's 265.3K lbs Form-R total is MIXED, with off-site transfers making up 56.3% of the bar. Next segment: air releases at 43.7%.

Trend & Where It's Reported

Reported Release Trend

Between 2019 and 2023, cumulative annual 1,1,2-Trichloroethane releases across all reporting facilities increased by 290% (37.7K lbs → 147.0K lbs). Year-to-year swings reflect facility openings/closures and reporting changes as much as underlying activity.

Geographic Concentration

Reporting for 1,1,2-Trichloroethane is highly concentrated: Texas accounts for 56.6% of the reported total (8 facilities). Next: Louisiana.

  • Texas 150.2K lbs
  • Louisiana 92.6K lbs
  • Minnesota 16.0K lbs
  • Kentucky 5.9K lbs
  • Arkansas 290 lbs
Industry Sources

Reporting for 1,1,2-Trichloroethane is highly concentrated by industry: Chemicals facilities account for 70.9% of the reported total (15 facilities). Next: Electric Utilities.

  • Chemicals 188.2K lbs
  • Electric Utilities 59.4K lbs
  • Fabricated Metals 16.0K lbs
  • Hazardous Waste 1.2K lbs
  • Nonmetallic Mineral Product 428 lbs

Which facilities release the most of this chemical?

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

# Facility Release (lbs)
1 Formosa Plastics Corp Texas
138.3K lbs
2 Westlake US 2 LLC
59.4K lbs
3 K & G Manufacturing Co
16.0K lbs
4 Formosa Plastics Corp Louisiana
8.5K lbs
5 Freeport_olin Bc
7.6K lbs
6 Westlake Vinyls Co
7.4K lbs
7 Occidental Chemical Holding Corp - Geismar Plant
6.7K lbs
8 Westlake Vinyls Inc
5.9K lbs
9 Westlake Chemicals & Vinyls LLC
3.7K lbs
10 Shintech Plaquemine Plant
2.7K lbs
11 Blue Cube Operations LLC - Plaquemine Site
2.5K lbs
12 Westlake Chemicals & Vinyls LLC
1.5K lbs
13 Oxy Vinyls LP la Porte Vcm Plant
1.1K lbs
14 Veolia Es Technical Solutions LLC Port Arthur Facility
1.1K lbs
15 Occidental Chemical Corp
926 lbs
16 Oxy Vinyls LP Deer Park-Vcm Plant
746 lbs
17 Dow Chemical Co Freeport Facility
472 lbs
18 Ash Grove Cement
283 lbs
19 Occidental Chemical Holding Corp
205 lbs
20 Norlite LLC
126 lbs
21 Clean Harbors Deer Park LLC
27 lbs
22 Safety-Kleen Systems Inc.
19 lbs
23 Giant Cement Co
19 lbs
24 Clean Harbors el Dorado LLC
7 lbs
25 Heritage Thermal Services
6 lbs
26 Ash Grove Cement Co
4 lbs
27 Veolia N.a. Inc.
2 lbs
28 Clean Harbors Aragonite LLC
1 lbs
29 Ross Incineration Services Inc
0 lbs

Frequently Asked Questions

What is 1,1,2-Trichloroethane in the EPA TRI? ▼
1,1,2-Trichloroethane (CAS Number: 79-00-5) is a chemical tracked by the EPA Toxic Release Inventory (TRI) program. It is not marked as a carcinogen in the TRI classification set. 29 facilities in the United States report releasing this chemical to the EPA.
How much 1,1,2-Trichloroethane is disclosed in U.S. TRI filings? ▼
U.S. facilities have reported a total of 265.3K lbs of 1,1,2-Trichloroethane 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-Trichloroethane? ▼
1,1,2-Trichloroethane is not marked as a carcinogen in the TRI classification set. 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-Trichloroethane? ▼
Formosa Plastics Corp Texas in TX reports the largest disclosed release of 1,1,2-Trichloroethane in this dataset, at 138.3K 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-Trichloroethane? ▼
The CAS (Chemical Abstracts Service) Registry Number for 1,1,2-Trichloroethane is 79-00-5. 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.

Related Guides

Understanding TRI Data
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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

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.