EPA TRI Chemical
Polychlorinated Biphenyls
CAS Number: 1336-36-3
- Total releases
- 24.5M lbs
- Number of facilities
- 106
- Carcinogen
- Yes
- PBT substance
- Yes
According to the EPA Toxics Release Inventory, Polychlorinated Biphenyls (CAS 1336-36-3) is disclosed by 106 Form R facilities totaling 24.5M 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.
Polychlorinated Biphenyls (CAS 1336-36-3) 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 A-LINE TDS INC. in OK at 8.1M 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
Polychlorinated Biphenyls: how the 24.5M lbs splits
24.5M lbs across all reported pathways
- Land Disposal23.7M lbs96.7%
- Off-site Transfers815.2K lbs3.3%
- Air Releases424 lbs<0.1%
- Water Discharges36 lbs<0.1%
Polychlorinated Biphenyls's 24.5M lbs Form-R total is LAND, with land disposal making up 96.7% of the bar. Next segment: off-site transfers at 3.3%.
Trend & Where It's Reported
Between 2019 and 2023, cumulative annual Polychlorinated Biphenyls releases across all reporting facilities decreased by 23% (6.5M lbs → 5.0M lbs). Year-to-year swings reflect facility openings/closures and reporting changes as much as underlying activity.
Reporting for Polychlorinated Biphenyls is concentrated: Oklahoma accounts for 33.7% of the reported total (2 facilities). Next: Alabama.
- Oklahoma 8.3M lbs
- Alabama 7.7M lbs
- Michigan 3.9M lbs
- Utah 2.0M lbs
- Nevada 836.3K lbs
Reporting for Polychlorinated Biphenyls is highly concentrated by industry: Hazardous Waste facilities account for 99.9% of the reported total (42 facilities). Next: Primary Metals.
- Hazardous Waste 24.5M lbs
- Primary Metals 10.7K lbs
- Computers and Electronic Products 5.7K lbs
- Other 1.4K lbs
- Chemicals 453 lbs
Which facilities release the most of this chemical?
Facilities with the largest reported releases of Polychlorinated Biphenyls. Up to 50 shown.
Frequently Asked Questions
What is Polychlorinated Biphenyls in the EPA TRI? ▼
How much Polychlorinated Biphenyls is disclosed in U.S. TRI filings? ▼
How does EPA TRI classify Polychlorinated Biphenyls? ▼
Which facilities disclose the most Polychlorinated Biphenyls? ▼
What is the CAS number for Polychlorinated Biphenyls? ▼
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.