PlainEnviro

EPA TRI Chemical

1,1,1,2-Tetrachloroethane

CAS Number: 630-20-6

Total releases
47.7K lbs
Number of facilities
19
Carcinogen
Yes
PBT substance
No
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Carcinogen

According to the EPA Toxics Release Inventory, 1,1,1,2-Tetrachloroethane (CAS 630-20-6) is disclosed by 19 Form R facilities totaling 47.7K 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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1,1,1,2-Tetrachloroethane (CAS 630-20-6) 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 WESTLAKE US 2 LLC in LA at 31.7K 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

1,1,1,2-Tetrachloroethane: how the 47.7K lbs splits

47.7K lbs across all reported pathways

  • Air Releases34.9K lbs73.2%
  • Off-site Transfers12.4K lbs26.0%
  • Water Discharges264 lbs0.6%
  • Land Disposal122 lbs0.3%

1,1,1,2-Tetrachloroethane's 47.7K lbs Form-R total is AIR, with air releases making up 73.2% of the bar. Next segment: off-site transfers at 26.0%.

Trend & Where It's Reported

Reported Release Trend

Between 2019 and 2023, cumulative annual 1,1,1,2-Tetrachloroethane releases across all reporting facilities increased by 186% (6.9K lbs → 19.9K lbs). Year-to-year swings reflect facility openings/closures and reporting changes as much as underlying activity.

Geographic Concentration

Reporting for 1,1,1,2-Tetrachloroethane is highly concentrated: Louisiana accounts for 66.6% of the reported total (3 facilities). Next: Texas.

  • Louisiana 31.8K lbs
  • Texas 12.9K lbs
  • Michigan 2.6K lbs
  • Kentucky 333 lbs
  • New York 122 lbs
Industry Sources

Reporting for 1,1,1,2-Tetrachloroethane is highly concentrated by industry: Electric Utilities facilities account for 66.6% of the reported total (1 facility). Next: Chemicals.

  • Electric Utilities 31.7K lbs
  • Chemicals 15.7K lbs
  • Nonmetallic Mineral Product 122 lbs
  • Hazardous Waste 111 lbs

Which facilities release the most of this chemical?

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

# Facility Release (lbs)
1 Westlake US 2 LLC
31.7K lbs
2 Formosa Plastics Corp Texas
12.4K lbs
3 Corteva Agriscience LLC - Midland
2.0K lbs
4 The Dow Chemical Co
626 lbs
5 Westlake Vinyls Inc
333 lbs
6 Norlite LLC
307 lbs
7 Eco Services Operations Corp.
222 lbs
8 Veolia Es Technical Solutions LLC Port Arthur Facility
97 lbs
9 Freeport_olin Bc
74 lbs
10 Dow Chemical Co Freeport Facility
59 lbs
11 Occidental Chemical Corp
36 lbs
12 Blue Cube Operations LLC - Plaquemine Site
12 lbs
13 Clean Harbors Deer Park LLC
6 lbs
14 Heritage Thermal Services
5 lbs
15 Veolia N.a. Inc.
2 lbs
16 Clean Harbors Aragonite LLC
1 lbs
17 Clean Harbors el Dorado LLC
0 lbs
18 Arcwood Environmental - Orange LLC
0 lbs
19 Shintech Plaquemine Plant
0 lbs

Frequently Asked Questions

What is 1,1,1,2-Tetrachloroethane in the EPA TRI? ▼
1,1,1,2-Tetrachloroethane (CAS Number: 630-20-6) 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. 19 facilities in the United States report releasing this chemical to the EPA.
How much 1,1,1,2-Tetrachloroethane is disclosed in U.S. TRI filings? ▼
U.S. facilities have reported a total of 47.7K lbs of 1,1,1,2-Tetrachloroethane releases to the EPA Toxic Release Inventory across 19 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 1,1,1,2-Tetrachloroethane? ▼
1,1,1,2-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 1,1,1,2-Tetrachloroethane? ▼
Westlake US 2 LLC in LA reports the largest disclosed release of 1,1,1,2-Tetrachloroethane in this dataset, at 31.7K lbs. Most reporting facilities for this chemical fall under electric utilities. Release data is self-reported annually to the EPA under the TRI program. View the full list of 19 facilities on this page.
What is the CAS number for 1,1,1,2-Tetrachloroethane? ▼
The CAS (Chemical Abstracts Service) Registry Number for 1,1,1,2-Tetrachloroethane is 630-20-6. 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.