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EPA TRI Chemical

Barium Compounds (except for Barium Sulfate (cas No. 7727-43-7))

EPA TRI Category Code: N040

Total releases
585.3M lbs
Number of facilities
697
Carcinogen
No
PBT substance
No
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According to the EPA Toxics Release Inventory, Barium Compounds (except for Barium Sulfate (cas No. 7727-43-7)) (EPA TRI Category Code N040) is disclosed by 697 Form R facilities totaling 585.3M lbs of reported releases. TRI pounds are self-reported disclosure totals, not a measured public-health risk score.

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Barium Compounds (except for Barium Sulfate (cas No. 7727-43-7)) (EPA TRI Category Code N040) 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 HECLA GREENS CREEK MINING CO in AK at 270.6M 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

Barium Compounds (except for Barium Sulfate (cas No. 7727-43-7)): how the 585.3M lbs splits

585.3M lbs across all reported pathways

  • Land Disposal533.9M lbs91.2%
  • Off-site Transfers48.2M lbs8.2%
  • Water Discharges1.7M lbs0.3%
  • Air Releases1.6M lbs0.3%

Barium Compounds (except for Barium Sulfate (cas No. 7727-43-7))'s 585.3M lbs Form-R total is LAND, with land disposal making up 91.2% of the bar. Next segment: off-site transfers at 8.2%.

Trend & Where It's Reported

Reported Release Trend

Between 2019 and 2023, cumulative annual Barium Compounds (except for Barium Sulfate (cas No. 7727-43-7)) releases across all reporting facilities decreased by 22% (136.3M lbs → 106.7M lbs). Year-to-year swings reflect facility openings/closures and reporting changes as much as underlying activity.

Geographic Concentration

Reporting for Barium Compounds (except for Barium Sulfate (cas No. 7727-43-7)) is concentrated: Alaska accounts for 46.7% of the reported total (8 facilities). Next: Texas.

  • Alaska 273.5M lbs
  • Texas 30.0M lbs
  • Michigan 25.7M lbs
  • Minnesota 21.0M lbs
  • Missouri 18.0M lbs
Industry Sources

Reporting for Barium Compounds (except for Barium Sulfate (cas No. 7727-43-7)) is concentrated by industry: Electric Utilities facilities account for 48.4% of the reported total (228 facilities). Next: Metal Mining.

  • Electric Utilities 283.2M lbs
  • Metal Mining 271.1M lbs
  • Primary Metals 7.4M lbs
  • Paper 6.1M lbs
  • Chemicals 5.5M lbs

Which facilities release the most of this chemical?

Facilities with the largest reported releases of Barium Compounds (except for Barium Sulfate (cas No. 7727-43-7)). Up to 50 shown.

# Facility Release (lbs)
1 Hecla Greens Creek Mining Co
270.6M lbs
2 Xcel Energy Sherburne County Generating Plant
10.6M lbs
3 Dte Electric Co-Belle River Power Plant
10.1M lbs
4 Colstrip Steam Electric Station
10.0M lbs
5 Springerville Generating Station
9.3M lbs
6 Boswell Energy Center
9.2M lbs
7 Omaha Public Power District Nebraska City Station
7.9M lbs
8 Coal Creek Station
5.9M lbs
9 Associated Electric Cooperative Inc New Madrid Power Plant
5.7M lbs
10 J H Campbell Generating Plant
5.5M lbs
11 Dte Electric Co - Monroe Power Plant
5.4M lbs
12 U.S. Tva Shawnee Fossil Plant
5.2M lbs
13 Limestone Electric Generating Station
5.0M lbs
14 W.a. Parish Electric Generating Station
4.7M lbs
15 Minnkota Power Cooperative Inc. Milton R. Young Station
4.6M lbs
16 Weston Power Plant
4.6M lbs
17 Pacificorp Dave Johnston Plant
4.5M lbs
18 Public Service Co of Colorado Comanche Station
4.5M lbs
19 Martin Lake Steam Electric Station & Lignite Mine
4.2M lbs
20 Sandy Creek Energy Station
4.2M lbs
21 Freeport-McMoran Miami Inc
4.2M lbs
22 Prairie State Generating Co
4.2M lbs
23 Jeffrey Energy Center
3.9M lbs
24 Oak Grove Steam Electric Station
3.8M lbs
25 Rockport Plant
3.8M lbs
26 San Miguel Electric Cooperative Inc
3.8M lbs
27 American Electric Power Amos Plant
3.7M lbs
28 Iatan Generating Station
3.6M lbs
29 Otter Tail Power Co Coyote Station
3.0M lbs
30 Ameren Missouri Labadie Energy Center
3.0M lbs
31 Pacificorp Jim Bridger Plant & Bridger Coal Co
3.0M lbs
32 Black Hills Corp - Neil Simpson Complex
2.9M lbs
33 Columbia Energy Center
2.9M lbs
34 U.S. Tva Gallatin Fossil Plant
2.8M lbs
35 Edwards Power Station
2.7M lbs
36 Public Service Co of Colorado Pawnee Station
2.6M lbs
37 La Cygne Generating Station
2.6M lbs
38 Four Corners Steam Electric Station
2.5M lbs
39 Thomas Hill Energy Center
2.4M lbs
40 Holcomb Unit 1
2.4M lbs
41 Pacificorp Hunter Plant
2.4M lbs
42 Cardinal Plant
2.3M lbs
43 Miller Steam Plant
2.3M lbs
44 Plum Point Energy Station
2.3M lbs
45 San Juan Generating Station
2.2M lbs
46 Public Service Co of Colorado Hayden Station
2.1M lbs
47 Pacificorp Wyodak Plant
2.0M lbs
48 Nipsco Michigan City Generating Station
2.0M lbs
49 Trapper Mining Inc.
2.0M lbs
50 Tri-State Generation & Transmission-Craig Station
2.0M lbs

Frequently Asked Questions

What is Barium Compounds (except for Barium Sulfate (cas No. 7727-43-7)) in the EPA TRI? ▼
Barium Compounds (except for Barium Sulfate (cas No. 7727-43-7)) (EPA TRI Category Code: N040) is a chemical tracked by the EPA Toxic Release Inventory (TRI) program. It is not marked as a carcinogen in the TRI classification set. 697 facilities in the United States report releasing this chemical to the EPA.
How much Barium Compounds (except for Barium Sulfate (cas No. 7727-43-7)) is disclosed in U.S. TRI filings? ▼
U.S. facilities have reported a total of 585.3M lbs of Barium Compounds (except for Barium Sulfate (cas No. 7727-43-7)) releases to the EPA Toxic Release Inventory across 697 facilities. Release quantities are self-reported estimates covering air, water, land, and off-site transfers. They are disclosure totals, not toxicity-weighted harm scores.
How does EPA TRI classify Barium Compounds (except for Barium Sulfate (cas No. 7727-43-7))? ▼
Barium Compounds (except for Barium Sulfate (cas No. 7727-43-7)) is not marked as a carcinogen in the TRI classification set. TRI classification flags document inventory listing status; they are not a site-specific exposure or health diagnosis. For health-effect summaries see EPA IRIS and ATSDR toxicological profiles.
Which facilities disclose the most Barium Compounds (except for Barium Sulfate (cas No. 7727-43-7))? ▼
Hecla Greens Creek Mining Co in AK reports the largest disclosed release of Barium Compounds (except for Barium Sulfate (cas No. 7727-43-7)) in this dataset, at 270.6M lbs. Most reporting facilities for this chemical fall under electric utilities. Release data is self-reported annually to the EPA under the TRI program. View the full list of 697 facilities on this page.
Why is Barium Compounds (except for Barium Sulfate (cas No. 7727-43-7)) listed under code N040 instead of a CAS number? ▼
N040 is an EPA TRI Category Code, not a CAS Registry Number. EPA assigns category codes (N-prefix and K-prefix) to chemical groups that share reporting requirements, for example, "Barium Compounds (except for Barium Sulfate (cas No. 7727-43-7))" covers many distinct compounds aggregated for TRI reporting. Individual constituents may have their own CAS Registry Numbers (e.g., elemental Lead is CAS 7439-92-1), but the group is reported under the single TRI Category Code.

Related Guides

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How to Check Environmental Quality
Step-by-step guide to checking your local environment

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.

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Data sourced from the U.S. Environmental Protection Agency (EPA). See our methodology for details. Retrieved and formatted by PlainEnviro

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.