PlainEnviro

EPA TRI Chemical

Dichlorobenzene (mixed Isomers)

CAS Number: 25321-22-6

Total releases
3.8K lbs
Number of facilities
11
Carcinogen
Yes
PBT substance
No
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Carcinogen

According to the EPA Toxics Release Inventory, Dichlorobenzene (mixed Isomers) (CAS 25321-22-6) is disclosed by 11 Form R facilities totaling 3.8K lbs of reported releases. The TRI extract marks this chemical with a carcinogen classification flag. TRI pounds are self-reported disclosure totals, not a measured public-health risk score.

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Dichlorobenzene (mixed Isomers) (CAS 25321-22-6) 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 largest individual disclosure in the current dataset comes from COVESTRO LLC in TX at 1.5K 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

Dichlorobenzene (mixed Isomers): how the 3.8K lbs splits

3.8K lbs across all reported pathways

  • Off-site Transfers2.3K lbs60.7%
  • Air Releases1.5K lbs39.3%
  • Land Disposal0 lbs<0.1%

Dichlorobenzene (mixed Isomers)'s 3.8K lbs Form-R total is MIXED, with off-site transfers making up 60.7% of the bar. Next segment: air releases at 39.3%.

Trend & Where It's Reported

Reported Release Trend

Between 2019 and 2023, cumulative annual Dichlorobenzene (mixed Isomers) releases across all reporting facilities decreased by 90% (900 lbs → 94 lbs). Year-to-year swings reflect facility openings/closures and reporting changes as much as underlying activity.

Geographic Concentration

Reporting for Dichlorobenzene (mixed Isomers) is concentrated: Texas accounts for 42.2% of the reported total (3 facilities). Next: Louisiana.

  • Texas 1.6K lbs
  • Louisiana 1.3K lbs
  • Arkansas 852 lbs
  • Utah 13 lbs
  • Ohio 10 lbs
Industry Sources

Reporting for Dichlorobenzene (mixed Isomers) is concentrated by industry: Chemicals facilities account for 39.6% of the reported total (3 facilities). Next: Electric Utilities.

  • Chemicals 1.5K lbs
  • Electric Utilities 1.3K lbs
  • Hazardous Waste 984 lbs
  • Nonmetallic Mineral Product 6 lbs

Which facilities release the most of this chemical?

Facilities with the largest reported releases of Dichlorobenzene (mixed Isomers). Up to 50 shown.

# Facility Release (lbs)
1 Covestro LLC
1.5K lbs
2 Westlake US 2 LLC
1.3K lbs
3 Clean Harbors el Dorado LLC
852 lbs
4 Clean Harbors Deer Park LLC
108 lbs
5 Clean Harbors Aragonite LLC
13 lbs
6 Occidental Chemical Corp
11 lbs
7 Reworld Tron Corp
10 lbs
8 Lacc LLC Us/lotte Chemical Louisiana LLC
10 lbs
9 Giant Cement Co
5 lbs
10 Holcim (us) Inc Holly Hill Plant
1 lbs
11 Ross Incineration Services Inc
0 lbs

Frequently Asked Questions

What is Dichlorobenzene (mixed Isomers) in the EPA TRI? ▼
Dichlorobenzene (mixed Isomers) (CAS Number: 25321-22-6) is a chemical tracked by the EPA Toxic Release Inventory (TRI) program. The TRI extract marks it with a carcinogen classification flag based on EPA/IARC/NTP listings. 11 facilities in the United States report releasing this chemical to the EPA.
How much Dichlorobenzene (mixed Isomers) is disclosed in U.S. TRI filings? ▼
U.S. facilities have reported a total of 3.8K lbs of Dichlorobenzene (mixed Isomers) releases to the EPA Toxic Release Inventory across 11 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 Dichlorobenzene (mixed Isomers)? ▼
Dichlorobenzene (mixed Isomers) carries a carcinogen classification flag in the TRI database (drawn from EPA, IARC, or NTP listings). 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 Dichlorobenzene (mixed Isomers)? ▼
Covestro LLC in TX reports the largest disclosed release of Dichlorobenzene (mixed Isomers) in this dataset, at 1.5K lbs. Most reporting facilities for this chemical fall under chemicals. Release data is self-reported annually to the EPA under the TRI program. View the full list of 11 facilities on this page.
What is the CAS number for Dichlorobenzene (mixed Isomers)? ▼
The CAS (Chemical Abstracts Service) Registry Number for Dichlorobenzene (mixed Isomers) is 25321-22-6. CAS numbers are unique numerical identifiers assigned to every chemical substance described in the open scientific literature. This identifier is used to search scientific databases and regulatory filings.

Related Guides

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

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.

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.