EPA TRI Chemical
Dioxin and Dioxin-Like Compounds
EPA TRI Category Code: N150
- Total releases
- 1.0K lbs
- Number of facilities
- 946
- Carcinogen
- Yes
- PBT substance
- Yes
According to the EPA Toxics Release Inventory, Dioxin and Dioxin-Like Compounds (EPA TRI Category Code N150) is disclosed by 946 Form R facilities totaling 1.0K lbs of reported releases. The TRI extract marks this chemical with a carcinogen classification flag. It is also listed as a persistent bioaccumulative toxicant (PBT) in the TRI extract. TRI pounds are self-reported disclosure totals, not a measured public-health risk score.
Dioxin and Dioxin-Like Compounds (EPA TRI Category Code N150) 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 PBT (persistent, bioaccumulative, toxic) status above carries a lower TRI reporting threshold than most listed chemicals, reflecting elevated regulatory concern about long-term environmental buildup. The largest individual disclosure in the current dataset comes from WESTLAKE VINYLS INC in KY at 329 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
Dioxin and Dioxin-Like Compounds: how the 1.0K lbs splits
1.0K lbs across all reported pathways
- Off-site Transfers622 lbs62.2%
- Land Disposal356 lbs35.6%
- Water Discharges12 lbs1.2%
- Air Releases10 lbs1.0%
Dioxin and Dioxin-Like Compounds's 1.0K lbs Form-R total is MIXED, with off-site transfers making up 62.2% of the bar. Next segment: land disposal at 35.6%.
Trend & Where It's Reported
Between 2019 and 2023, cumulative annual Dioxin and Dioxin-Like Compounds releases across all reporting facilities increased by 10% (231 lbs → 254 lbs). Year-to-year swings reflect facility openings/closures and reporting changes as much as underlying activity.
Reporting for Dioxin and Dioxin-Like Compounds is concentrated: Texas accounts for 34.2% of the reported total (77 facilities). Next: Kentucky.
- Texas 342 lbs
- Kentucky 330 lbs
- Utah 105 lbs
- Alabama 98 lbs
- Ohio 28 lbs
Reporting for Dioxin and Dioxin-Like Compounds is highly concentrated by industry: Chemicals facilities account for 70.4% of the reported total (77 facilities). Next: Hazardous Waste.
- Chemicals 705 lbs
- Hazardous Waste 148 lbs
- Primary Metals 129 lbs
- Paper 9 lbs
- Electric Utilities 5 lbs
Which facilities release the most of this chemical?
Facilities with the largest reported releases of Dioxin and Dioxin-Like Compounds. Up to 50 shown.
Frequently Asked Questions
What is Dioxin and Dioxin-Like Compounds in the EPA TRI? ▼
How much Dioxin and Dioxin-Like Compounds is disclosed in U.S. TRI filings? ▼
How does EPA TRI classify Dioxin and Dioxin-Like Compounds? ▼
Which facilities disclose the most Dioxin and Dioxin-Like Compounds? ▼
Why is Dioxin and Dioxin-Like Compounds listed under code N150 instead of a CAS number? ▼
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.
Persistent Bioaccumulative Toxicant (PBT): This chemical is classified as a PBT by the EPA. PBT chemicals are toxic, persist in the environment, and bioaccumulate in food chains. Because of these properties, even relatively small releases can pose a significant threat to human health and the environment over time.
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.