EPA TRI Chemical
Manganese
CAS Number: 7439-96-5
- Total releases
- 63.3M lbs
- Number of facilities
- 2,916
- Carcinogen
- No
- PBT substance
- No
According to the EPA Toxics Release Inventory, Manganese (CAS 7439-96-5) is disclosed by 2,916 Form R facilities totaling 63.3M lbs of reported releases. TRI pounds are self-reported disclosure totals, not a measured public-health risk score.
Manganese (CAS 7439-96-5) 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 INEOS PIGMENTS USA INC in OH at 10.8M 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
Manganese: how the 63.3M lbs splits
63.3M lbs across all reported pathways
- Land Disposal30.4M lbs48.0%
- Off-site Transfers30.2M lbs47.7%
- Air Releases2.0M lbs3.1%
- Water Discharges729.7K lbs1.2%
Manganese's 63.3M lbs Form-R total is MIXED, with land disposal making up 48.0% of the bar. Next segment: off-site transfers at 47.7%.
Trend & Where It's Reported
Between 2019 and 2023, cumulative annual Manganese releases across all reporting facilities decreased by 29% (15.1M lbs → 10.7M lbs). Year-to-year swings reflect facility openings/closures and reporting changes as much as underlying activity.
Reporting for Manganese is concentrated: Ohio accounts for 39.3% of the reported total (227 facilities). Next: Illinois.
- Ohio 24.9M lbs
- Illinois 4.6M lbs
- Wisconsin 4.4M lbs
- Michigan 4.0M lbs
- Pennsylvania 3.2M lbs
Reporting for Manganese is concentrated by industry: Primary Metals facilities account for 32.2% of the reported total (482 facilities). Next: Chemicals.
- Primary Metals 20.4M lbs
- Chemicals 18.8M lbs
- Fabricated Metals 7.9M lbs
- Hazardous Waste 3.5M lbs
- Nonmetallic Mineral Product 3.4M lbs
Which facilities release the most of this chemical?
Facilities with the largest reported releases of Manganese. Up to 50 shown.
Frequently Asked Questions
What is Manganese in the EPA TRI? ▼
How much Manganese is disclosed in U.S. TRI filings? ▼
How does EPA TRI classify Manganese? ▼
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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.