EPA TRI Chemical
Propylene
CAS Number: 115-07-1
- Total releases
- 36.5M lbs
- Number of facilities
- 541
- Carcinogen
- No
- PBT substance
- No
According to the EPA Toxics Release Inventory, Propylene (CAS 115-07-1) is disclosed by 541 Form R facilities totaling 36.5M lbs of reported releases. TRI pounds are self-reported disclosure totals, not a measured public-health risk score.
Propylene (CAS 115-07-1) 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 EASTMAN CHEMICAL CO TEXAS OPERATIONS in TX at 1.9M 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
Propylene: how the 36.5M lbs splits
36.5M lbs across all reported pathways
- Air Releases36.4M lbs99.7%
- Land Disposal83.1K lbs0.2%
- Off-site Transfers9.0K lbs<0.1%
- Water Discharges543 lbs<0.1%
Propylene's 36.5M lbs Form-R total is AIR, with air releases making up 99.7% of the bar. Next segment: land disposal at 0.2%.
Trend & Where It's Reported
Between 2019 and 2023, cumulative annual Propylene releases across all reporting facilities increased by 6% (7.2M lbs → 7.6M lbs). Year-to-year swings reflect facility openings/closures and reporting changes as much as underlying activity.
Reporting for Propylene is highly concentrated: Texas accounts for 56.2% of the reported total (133 facilities). Next: Louisiana.
- Texas 20.5M lbs
- Louisiana 8.5M lbs
- Iowa 641.6K lbs
- California 633.3K lbs
- West Virginia 604.9K lbs
Reporting for Propylene is highly concentrated by industry: Chemicals facilities account for 72.5% of the reported total (145 facilities). Next: Petroleum.
- Chemicals 26.4M lbs
- Petroleum 7.6M lbs
- Transportation Equipment 515.4K lbs
- Metal Mining 419.9K lbs
- Fabricated Metals 391.3K lbs
Which facilities release the most of this chemical?
Facilities with the largest reported releases of Propylene. Up to 50 shown.
Frequently Asked Questions
What is Propylene in the EPA TRI? ▼
How much Propylene is disclosed in U.S. TRI filings? ▼
How does EPA TRI classify Propylene? ▼
Which facilities disclose the most Propylene? ▼
What is the CAS number for Propylene? ▼
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
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.