PlainEnviro

EPA TRI Chemical

Thallium and Thallium Compounds

EPA TRI Category Code: N760

Total releases
732.9K lbs
Number of facilities
19
Carcinogen
No
PBT substance
No
Verify at EPA TRI →

According to the EPA Toxics Release Inventory, Thallium and Thallium Compounds (EPA TRI Category Code N760) is disclosed by 19 Form R facilities totaling 732.9K lbs of reported releases. TRI pounds are self-reported disclosure totals, not a measured public-health risk score.

View saved records

Thallium and Thallium Compounds (EPA TRI Category Code N760) 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 GIBSON GENERATING STATION in IN at 97.2K 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.

LAND pathway mix

Thallium and Thallium Compounds: how the 732.9K lbs splits

732.9K lbs across all reported pathways

  • Land Disposal682.3K lbs93.1%
  • Off-site Transfers45.8K lbs6.2%
  • Air Releases3.2K lbs0.4%
  • Water Discharges1.6K lbs0.2%

Thallium and Thallium Compounds's 732.9K lbs Form-R total is LAND, with land disposal making up 93.1% of the bar. Next segment: off-site transfers at 6.2%.

Trend & Where It's Reported

Reported Release Trend

Between 2020 and 2023, cumulative annual Thallium and Thallium Compounds releases across all reporting facilities increased by 20% (121.8K lbs → 145.7K lbs). Year-to-year swings reflect facility openings/closures and reporting changes as much as underlying activity.

Geographic Concentration

Reporting for Thallium and Thallium Compounds is dispersed: Texas accounts for 24.4% of the reported total (4 facilities). Next: Indiana.

  • Texas 179.2K lbs
  • Indiana 146.6K lbs
  • Kentucky 146.4K lbs
  • Utah 108.5K lbs
  • Alabama 73.1K lbs
Industry Sources

Reporting for Thallium and Thallium Compounds is highly concentrated by industry: Electric Utilities facilities account for 80.7% of the reported total (14 facilities). Next: Hazardous Waste.

  • Electric Utilities 591.5K lbs
  • Hazardous Waste 104.7K lbs
  • Primary Metals 35.4K lbs
  • Nonmetallic Mineral Product 1.3K lbs

Which facilities release the most of this chemical?

Facilities with the largest reported releases of Thallium and Thallium Compounds. Up to 50 shown.

# Facility Release (lbs)
1 Gibson Generating Station
97.2K lbs
2 Oak Grove Steam Electric Station
77.1K lbs
3 Clean Harbors Grassy Mountain LLC
73.1K lbs
4 Kentucky Utilities Co Ghent Station
69.9K lbs
5 Merom Generating Station
49.4K lbs
6 American Electric Power H.w. Pirkey Power Plant
48.7K lbs
7 Miller Steam Plant
41.5K lbs
8 Kennecott Utah Copper Smelter & Refinery
35.4K lbs
9 Colstrip Steam Electric Station
31.9K lbs
10 Chemical Waste Management
31.6K lbs
11 Louisville Gas & Electric Co. - Trimble County Station
30.3K lbs
12 Martin Lake Steam Electric Station & Lignite Mine
29.4K lbs
13 Scherer Steam Electric Generating Plant
25.7K lbs
14 Louisville Gas & Electric Co. - Mill Creek Station
25.2K lbs
15 San Miguel Electric Cooperative Inc
24.0K lbs
16 U.S. Tva Shawnee Fossil Plant
21.0K lbs
17 U.S. Tva Cumberland Fossil Plant
20.2K lbs
18 Gcc Rio Grande Inc
1.2K lbs
19 Giant Cement Co
41 lbs

Frequently Asked Questions

What is Thallium and Thallium Compounds in the EPA TRI? ▼
Thallium and Thallium Compounds (EPA TRI Category Code: N760) is a chemical tracked by the EPA Toxic Release Inventory (TRI) program. It is not marked as a carcinogen in the TRI classification set. 19 facilities in the United States report releasing this chemical to the EPA.
How much Thallium and Thallium Compounds is disclosed in U.S. TRI filings? ▼
U.S. facilities have reported a total of 732.9K lbs of Thallium and Thallium Compounds 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 Thallium and Thallium Compounds? ▼
Thallium and Thallium Compounds 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 Thallium and Thallium Compounds? ▼
Gibson Generating Station in IN reports the largest disclosed release of Thallium and Thallium Compounds in this dataset, at 97.2K 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.
Why is Thallium and Thallium Compounds listed under code N760 instead of a CAS number? ▼
N760 is an EPA TRI Category Code, not a CAS Registry Number. EPA assigns category codes (N-prefix and K-prefix) to chemical groups that share reporting requirements, for example, "Thallium and Thallium Compounds" covers many distinct compounds aggregated for TRI reporting. Individual constituents may have their own CAS Registry Numbers (e.g., elemental Lead is CAS 7439-92-1), but the group is reported under the single TRI Category Code.

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

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.

Related

Browse all → | Rankings →
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.