EPA TRI Chemical
Metribuzin
CAS Number: 21087-64-9
- Total releases
- 159.6K lbs
- Number of facilities
- 21
- Carcinogen
- No
- PBT substance
- No
According to the EPA Toxics Release Inventory, Metribuzin (CAS 21087-64-9) is disclosed by 21 Form R facilities totaling 159.6K lbs of reported releases. TRI pounds are self-reported disclosure totals, not a measured public-health risk score.
Metribuzin (CAS 21087-64-9) 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 GOWAN MILLING BLYTHEVILLE LLC in AR at 56.9K 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.
OFFSITE pathway mix
Metribuzin: how the 159.6K lbs splits
159.6K lbs across all reported pathways
- Off-site Transfers151.2K lbs94.7%
- Air Releases8.3K lbs5.2%
- Water Discharges164 lbs0.1%
- Land Disposal0 lbs<0.1%
Metribuzin's 159.6K lbs Form-R total is OFFSITE, with off-site transfers making up 94.7% of the bar. Next segment: air releases at 5.2%.
Trend & Where It's Reported
Between 2019 and 2023, cumulative annual Metribuzin releases across all reporting facilities increased by 74% (14.7K lbs → 25.6K lbs). Year-to-year swings reflect facility openings/closures and reporting changes as much as underlying activity.
Reporting for Metribuzin is concentrated: Arkansas accounts for 35.6% of the reported total (1 facility). Next: Tennessee.
- Arkansas 56.9K lbs
- Tennessee 48.5K lbs
- Ohio 23.2K lbs
- Indiana 20.7K lbs
- Missouri 5.4K lbs
Reporting for Metribuzin is highly concentrated by industry: Hazardous Waste facilities account for 57.9% of the reported total (4 facilities). Next: Chemicals.
- Hazardous Waste 92.5K lbs
- Chemicals 67.1K lbs
Which facilities release the most of this chemical?
Facilities with the largest reported releases of Metribuzin. Up to 50 shown.
Frequently Asked Questions
What is Metribuzin in the EPA TRI? ▼
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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.