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EPA TRI Chemical

Methyl Parathion

CAS Number: 298-00-0

Total releases
94.3K lbs
Number of facilities
3
Carcinogen
No
PBT substance
No
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According to the EPA Toxics Release Inventory, Methyl Parathion (CAS 298-00-0) is disclosed by 3 Form R facilities totaling 94.3K lbs of reported releases. TRI pounds are self-reported disclosure totals, not a measured public-health risk score.

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Methyl Parathion (CAS 298-00-0) 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 TM DEER PARK SERVICES LP in TX at 94.3K 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

Methyl Parathion: how the 94.3K lbs splits

94.3K lbs across all reported pathways

  • Land Disposal94.3K lbs99.9%
  • Off-site Transfers56 lbs0.1%
  • Air Releases10 lbs<0.1%

Methyl Parathion's 94.3K lbs Form-R total is LAND, with land disposal making up 99.9% of the bar. Next segment: off-site transfers at 0.1%.

Trend & Where It's Reported

Reported Release Trend

Between 2020 and 2023, cumulative annual Methyl Parathion releases across all reporting facilities decreased by 100% (13.7K lbs → 62 lbs). Year-to-year swings reflect facility openings/closures and reporting changes as much as underlying activity.

Geographic Concentration

Reporting for Methyl Parathion is highly concentrated: Texas accounts for 99.9% of the reported total (2 facilities). Next: Missouri.

  • Texas 94.3K lbs
  • Missouri 62 lbs
Industry Sources

Reporting for Methyl Parathion is highly concentrated by industry: Hazardous Waste facilities account for 99.9% of the reported total (2 facilities). Next: Nonmetallic Mineral Product.

  • Hazardous Waste 94.3K lbs
  • Nonmetallic Mineral Product 62 lbs

Which facilities release the most of this chemical?

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

# Facility Release (lbs)
1 Tm Deer Park Services LP
94.3K lbs
2 Buzzi Unicem Usa-Cape Girardeau
62 lbs
3 Clean Harbors Deer Park LLC
0 lbs

Frequently Asked Questions

What is Methyl Parathion in the EPA TRI? ▼
Methyl Parathion (CAS Number: 298-00-0) is a chemical tracked by the EPA Toxic Release Inventory (TRI) program. It is not marked as a carcinogen in the TRI classification set. 3 facilities in the United States report releasing this chemical to the EPA.
How much Methyl Parathion is disclosed in U.S. TRI filings? ▼
U.S. facilities have reported a total of 94.3K lbs of Methyl Parathion releases to the EPA Toxic Release Inventory across 3 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 Methyl Parathion? ▼
Methyl Parathion 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 Methyl Parathion? ▼
Tm Deer Park Services LP in TX reports the largest disclosed release of Methyl Parathion in this dataset, at 94.3K 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 3 facilities on this page.
What is the CAS number for Methyl Parathion? ▼
The CAS (Chemical Abstracts Service) Registry Number for Methyl Parathion is 298-00-0. 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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Which facilities release the most toxics
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.