PlainEnviro

EPA TRI Chemical

Pentachlorophenol

CAS Number: 87-86-5

Total releases
27.4K lbs
Number of facilities
41
Carcinogen
Yes
PBT substance
No
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Carcinogen

According to the EPA Toxics Release Inventory, Pentachlorophenol (CAS 87-86-5) is disclosed by 41 Form R facilities totaling 27.4K 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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Pentachlorophenol (CAS 87-86-5) 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 DEER PARK LLC in TX at 8.0K 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.

OFFSITE pathway mix

Pentachlorophenol: how the 27.4K lbs splits

27.4K lbs across all reported pathways

  • Off-site Transfers21.1K lbs76.9%
  • Land Disposal3.1K lbs11.4%
  • Water Discharges2.9K lbs10.5%
  • Air Releases342 lbs1.2%

Pentachlorophenol's 27.4K lbs Form-R total is OFFSITE, with off-site transfers making up 76.9% of the bar. Next segment: land disposal at 11.4%.

Trend & Where It's Reported

Reported Release Trend

Between 2019 and 2023, cumulative annual Pentachlorophenol releases across all reporting facilities increased by 1153% (1.2K lbs → 15.2K lbs). Year-to-year swings reflect facility openings/closures and reporting changes as much as underlying activity.

Geographic Concentration

Reporting for Pentachlorophenol is concentrated: Texas accounts for 42.3% of the reported total (6 facilities). Next: Arkansas.

  • Texas 11.6K lbs
  • Arkansas 8.1K lbs
  • Ohio 4.5K lbs
  • Alabama 1.6K lbs
  • Mississippi 575 lbs
Industry Sources

Reporting for Pentachlorophenol is highly concentrated by industry: Hazardous Waste facilities account for 86.2% of the reported total (8 facilities). Next: Wood Products.

  • Hazardous Waste 23.6K lbs
  • Wood Products 3.6K lbs
  • Chemicals 207 lbs
  • Nonmetallic Mineral Product 12 lbs
  • Fabricated Metals 0 lbs

Which facilities release the most of this chemical?

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

# Facility Release (lbs)
1 Clean Harbors Deer Park LLC
8.0K lbs
2 Clean Harbors el Dorado LLC
7.7K lbs
3 Heritage Thermal Services
4.5K lbs
4 US Ecology Texas Inc
3.1K lbs
5 Cox Wood of Alabama
1.4K lbs
6 Stella-Jones Corp
509 lbs
7 Stella-Jones Corp
374 lbs
8 Veolia Es Technical Solutions LLC Port Arthur Facility
298 lbs
9 Dow Chemical Co Freeport Facility
205 lbs
10 Stella-Jones Corp
184 lbs
11 Stella-Jones Corp
162 lbs
12 Stella-Jones Corp
131 lbs
13 William C. Meredith Co. Inc.
124 lbs
14 Atlantic Pole - Georgia LLC
112 lbs
15 Stella-Jones Corp
93 lbs
16 Koppers Utility & Industrial Products
74 lbs
17 Stella-Jones Corp
66 lbs
18 Stella-Jones Corp
64 lbs
19 Bell Lumber & Pole Co.
58 lbs
20 Stella-Jones Corp
55 lbs
21 Stella-Jones Corp
42 lbs
22 Oklahoma Pole & Lumber Co
29 lbs
23 Bell Lumber & Pole Co
28 lbs
24 T R Miller Mill Co Inc
18 lbs
25 Stella-Jones Corp
15 lbs
26 Buzzi Unicem Usa-Cape Girardeau
12 lbs
27 Carolina Pole Leland
11 lbs
28 Permapost Products Inc
10 lbs
29 Clean Harbors Environmental Services Inc
9 lbs
30 Clean Harbors Aragonite LLC
7 lbs
31 Stella-Jones Corp
5 lbs
32 Corteva Freeport Operations
2 lbs
33 Brooks Manufacturing Co.
2 lbs
34 Huxford Pole & Timber Co. Inc.
2 lbs
35 Dis-Tran Overhead Solutions LLC
1 lbs
36 Arcwood Environmental - Orange LLC
0 lbs
37 Bell Lumber & Pole Co Washington LLC
0 lbs
38 J H Baxter & Co
0 lbs
39 Hughes Brothers Inc
0 lbs
40 Heidelberg Materials US Cement LLC
0 lbs
41 Stella-Jones Corp
0 lbs

Frequently Asked Questions

What is Pentachlorophenol in the EPA TRI? ▼
Pentachlorophenol (CAS Number: 87-86-5) 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. 41 facilities in the United States report releasing this chemical to the EPA.
How much Pentachlorophenol is disclosed in U.S. TRI filings? ▼
U.S. facilities have reported a total of 27.4K lbs of Pentachlorophenol releases to the EPA Toxic Release Inventory across 41 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 Pentachlorophenol? ▼
Pentachlorophenol 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 Pentachlorophenol? ▼
Clean Harbors Deer Park LLC in TX reports the largest disclosed release of Pentachlorophenol in this dataset, at 8.0K 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 41 facilities on this page.
What is the CAS number for Pentachlorophenol? ▼
The CAS (Chemical Abstracts Service) Registry Number for Pentachlorophenol is 87-86-5. 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

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.

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.