PlainEnviro

EPA TRI Chemical

Heptachlor

CAS Number: 76-44-8

Total releases
1.7K lbs
Number of facilities
19
Carcinogen
Yes
PBT substance
Yes
Verify at EPA TRI →
Carcinogen PBT

According to the EPA Toxics Release Inventory, Heptachlor (CAS 76-44-8) is disclosed by 19 Form R facilities totaling 1.7K lbs of reported releases. The TRI extract marks this chemical with a carcinogen classification flag. It is also listed as a persistent bioaccumulative toxicant (PBT) in the TRI extract. TRI pounds are self-reported disclosure totals, not a measured public-health risk score.

View saved records

Heptachlor (CAS 76-44-8) 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 PBT (persistent, bioaccumulative, toxic) status above carries a lower TRI reporting threshold than most listed chemicals, reflecting elevated regulatory concern about long-term environmental buildup. The largest individual disclosure in the current dataset comes from CHEMICAL WASTE MANAGEMENT in AL at 582 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

Heptachlor: how the 1.7K lbs splits

1.7K lbs across all reported pathways

  • Land Disposal1.3K lbs75.7%
  • Off-site Transfers260 lbs15.3%
  • Air Releases153 lbs9.0%

Heptachlor's 1.7K lbs Form-R total is LAND, with land disposal making up 75.7% of the bar. Next segment: off-site transfers at 15.3%.

Trend & Where It's Reported

Reported Release Trend

Between 2019 and 2023, cumulative annual Heptachlor releases across all reporting facilities increased by 642% (87 lbs → 643 lbs). Year-to-year swings reflect facility openings/closures and reporting changes as much as underlying activity.

Geographic Concentration

Reporting for Heptachlor is concentrated: Alabama accounts for 34.2% of the reported total (1 facility). Next: Oregon.

  • Alabama 582 lbs
  • Oregon 483 lbs
  • Idaho 165 lbs
  • Nebraska 147 lbs
  • Michigan 125 lbs
Industry Sources

Reporting for Heptachlor is highly concentrated by industry: Hazardous Waste facilities account for 100.0% of the reported total (18 facilities). Next: Other.

  • Hazardous Waste 1.7K lbs
  • Other 0 lbs

Which facilities release the most of this chemical?

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

# Facility Release (lbs)
1 Chemical Waste Management
582 lbs
2 Chemical Waste Management of the Northwest Inc.
483 lbs
3 US Ecology Idaho Inc.
165 lbs
4 Clean Harbors Environmental Services Inc
147 lbs
5 Wayne Disposal Inc
125 lbs
6 Heritage Thermal Services
113 lbs
7 Chemical Waste Management Inc
61 lbs
8 Elemental Environmental Solutions LLC
8 lbs
9 Veolia N.a. Inc.
7 lbs
10 Clean Harbors el Dorado LLC
4 lbs
11 Veolia Es Technical Solutions LLC Port Arthur Facility
2 lbs
12 Clean Harbors Deer Park LLC
2 lbs
13 Desotec US LLC Darlington Facility
0 lbs
14 Ross Incineration Services Inc
0 lbs
15 Tradebe Treatment & Recycling of Tn
0 lbs
16 Clean Harbors Aragonite LLC
0 lbs
17 Arcwood Environmental - Orange LLC
0 lbs
18 Clean Harbors of Baltimore Inc.
0 lbs
19 Tradebe Treatment & Recycling LLC
0 lbs
20 Mxi Environmental Services LLC
0 lbs

Frequently Asked Questions

What is Heptachlor in the EPA TRI? ▼
Heptachlor (CAS Number: 76-44-8) 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. It is classified as a persistent bioaccumulative toxicant (PBT) in the TRI extract. 19 facilities in the United States report releasing this chemical to the EPA.
How much Heptachlor is disclosed in U.S. TRI filings? ▼
U.S. facilities have reported a total of 1.7K lbs of Heptachlor releases to the EPA Toxic Release Inventory across 19 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 Heptachlor? ▼
Heptachlor carries a carcinogen classification flag in the TRI database (drawn from EPA, IARC, or NTP listings). It is also listed as a persistent bioaccumulative toxicant (PBT), which uses lower TRI reporting thresholds. 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 Heptachlor? ▼
Chemical Waste Management in AL reports the largest disclosed release of Heptachlor in this dataset, at 582 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 19 facilities on this page.
What is the CAS number for Heptachlor? ▼
The CAS (Chemical Abstracts Service) Registry Number for Heptachlor is 76-44-8. 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
How the Toxic Release Inventory works
Biggest Polluters in America
Which facilities release the most toxics
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.

Persistent Bioaccumulative Toxicant (PBT): This chemical is classified as a PBT by the EPA. PBT chemicals are toxic, persist in the environment, and bioaccumulate in food chains. Because of these properties, even relatively small releases can pose a significant threat to human health and the environment over time.

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

Browse all → | Rankings →
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.