EPA TRI Chemical
Arsenic
CAS Number: 7440-38-2
- Total releases
- 5.1M lbs
- Number of facilities
- 84
- Carcinogen
- Yes
- PBT substance
- No
According to the EPA Toxics Release Inventory, Arsenic (CAS 7440-38-2) is disclosed by 84 Form R facilities totaling 5.1M 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.
Arsenic (CAS 7440-38-2) 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 CLEAN HARBORS GRASSY MOUNTAIN LLC in UT at 1.4M 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
Arsenic: how the 5.1M lbs splits
5.1M lbs across all reported pathways
- Land Disposal3.9M lbs77.0%
- Off-site Transfers1.2M lbs22.7%
- Water Discharges11.9K lbs0.2%
- Air Releases5.8K lbs0.1%
Arsenic's 5.1M lbs Form-R total is LAND, with land disposal making up 77.0% of the bar. Next segment: off-site transfers at 22.7%.
Trend & Where It's Reported
Between 2019 and 2023, cumulative annual Arsenic releases across all reporting facilities increased by 24% (869.8K lbs → 1.1M lbs). Year-to-year swings reflect facility openings/closures and reporting changes as much as underlying activity.
Reporting for Arsenic is concentrated: Utah accounts for 28.4% of the reported total (2 facilities). Next: Arizona.
- Utah 1.4M lbs
- Arizona 861.9K lbs
- Louisiana 470.3K lbs
- Nevada 405.2K lbs
- Alabama 376.5K lbs
Reporting for Arsenic is concentrated by industry: Hazardous Waste facilities account for 47.8% of the reported total (17 facilities). Next: Metal Mining.
- Hazardous Waste 2.4M lbs
- Metal Mining 1.2M lbs
- Primary Metals 484.2K lbs
- Chemicals 458.6K lbs
- Machinery 353.0K lbs
Which facilities release the most of this chemical?
Facilities with the largest reported releases of Arsenic. Up to 50 shown.
Frequently Asked Questions
What is Arsenic in the EPA TRI? ▼
How much Arsenic is disclosed in U.S. TRI filings? ▼
How does EPA TRI classify Arsenic? ▼
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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.
Related
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.