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EPA TRI Chemical

Diazinon

CAS Number: 333-41-5

Total releases
1.4K lbs
Number of facilities
15
Carcinogen
Yes
PBT substance
No
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Carcinogen

According to the EPA Toxics Release Inventory, Diazinon (CAS 333-41-5) is disclosed by 15 Form R facilities totaling 1.4K 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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Diazinon (CAS 333-41-5) 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.

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 CLEAN HARBORS ENVIRONMENTAL SERVICES INC in NE at 791 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

Diazinon: how the 1.4K lbs splits

1.4K lbs across all reported pathways

  • Off-site Transfers922 lbs68.0%
  • Air Releases419 lbs30.9%
  • Water Discharges15 lbs1.1%
  • Land Disposal0 lbs<0.1%

Diazinon's 1.4K lbs Form-R total is MIXED, with off-site transfers making up 68.0% of the bar. Next segment: air releases at 30.9%.

Trend & Where It's Reported

Reported Release Trend

Between 2019 and 2023, cumulative annual Diazinon releases across all reporting facilities increased by 357% (43 lbs → 197 lbs). Year-to-year swings reflect facility openings/closures and reporting changes as much as underlying activity.

Geographic Concentration

Reporting for Diazinon is highly concentrated: Nebraska accounts for 58.4% of the reported total (1 facility). Next: Mississippi.

  • Nebraska 791 lbs
  • Mississippi 280 lbs
  • Arkansas 180 lbs
  • Georgia 45 lbs
  • Kansas 40 lbs
Industry Sources

Reporting for Diazinon is highly concentrated by industry: Hazardous Waste facilities account for 73.1% of the reported total (9 facilities). Next: Chemicals.

  • Hazardous Waste 991 lbs
  • Chemicals 365 lbs
  • Plastics and Rubber 0 lbs

Which facilities release the most of this chemical?

Facilities with the largest reported releases of Diazinon. Up to 50 shown.

# Facility Release (lbs)
1 Clean Harbors Environmental Services Inc
791 lbs
2 Platte Chemical Co
280 lbs
3 Clean Harbors el Dorado LLC
178 lbs
4 Drexel Chemical Co
45 lbs
5 Ritepack Inc
40 lbs
6 Clean Harbors Aragonite LLC
9 lbs
7 Veolia N.a. Inc.
8 lbs
8 Elemental Environmental Solutions LLC
2 lbs
9 Clean Harbors Deer Park LLC
1 lbs
10 Heritage Thermal Services
1 lbs
11 Ross Incineration Services Inc
0 lbs
12 Arcwood Environmental - Orange LLC
0 lbs
13 Gowan Milling LLC
0 lbs
14 Y-Tex Corp
0 lbs
15 Schirm USA Inc.
0 lbs

Frequently Asked Questions

What is Diazinon in the EPA TRI? ▼
Diazinon (CAS Number: 333-41-5) 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. 15 facilities in the United States report releasing this chemical to the EPA.
How much Diazinon is disclosed in U.S. TRI filings? ▼
U.S. facilities have reported a total of 1.4K lbs of Diazinon releases to the EPA Toxic Release Inventory across 15 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 Diazinon? ▼
Diazinon 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 Diazinon? ▼
Clean Harbors Environmental Services Inc in NE reports the largest disclosed release of Diazinon in this dataset, at 791 lbs. Most reporting facilities for this chemical fall under hazardous waste. Release data is self-reported annually to the EPA under the TRI program. View the full list of 15 facilities on this page.
What is the CAS number for Diazinon? ▼
The CAS (Chemical Abstracts Service) Registry Number for Diazinon is 333-41-5. 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

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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.