EPA TRI Facility · Paper
Onyx Specialty Papers Inc. - Willow Mill
South Lee, MA
- Total releases
- 135.9K lbs
- Chemicals reported
- 2
- Carcinogens
- 1
- Primary pathway
- Air Releases
Onyx Specialty Papers Inc. - Willow Mill is an EPA Toxics Release Inventory reporter in South Lee, MA, in the paper sector. It reported 26.6K lbs of releases across 2 chemicals in 2024, and 135.9K lbs in total across its 2019-2024 reporting years. That ranks 3,946 of 25,986 TRI facilities nationwide by cumulative reported pounds, counting each facility over however many years it has filed. Reported volume fell against 2022. Pounds reported are not a measure of toxicity or health risk. Nearest other TRI reporters: Pittsfield Generating Co LP; O'Connell Oil Co Merrill Road Facility; Crane & Co. Inc.; Crane Pioneer Mill. Similar-scale Paper peers outside Massachusetts: Loparex Inc; Bedford Technical Products LLC; Upm Raflatac Inc; Westrock - Solvay LLC. Largest disclosed chemicals by pounds: Formaldehyde; Formic acid.
Onyx Specialty Papers Inc. - Willow Mill has reported 135.9K lbs of toxic releases across 2 chemicals to the EPA Toxic Release Inventory, based on annual facility disclosures from 2019 through 2023. Of the chemicals reported, 1 is classified as carcinogen, representing 50% of the facility's chemical profile. The facility operates in the Paper sector. The primary release pathway is air releases, accounting for 95% of total releases. All release data shown below is self-reported to the EPA under the Emergency Planning and Community Right-to-Know Act (EPCRA) Section 313.
Where this facility sits in the TRI record
Among the 384 Paper facilities in this database, Onyx Specialty Papers Inc. - Willow Mill reports the 159th-largest volume (135.9K lbs). This one site accounts for 67.5% of every pound reported in Berkshire. Its reported volume is concentrated rather than spread: Formaldehyde alone is 97.5% of the total. Carcinogen-classified chemicals make up 97.5% of the reported pounds, not just of the chemical count.
Placement is computed from reported TRI pounds in this database. Thresholds are fixed across every facility page: concentrated ≥60% of volume in one chemical, county-dominant ≥25% of the county total, carcinogen-heavy ≥50% of pounds. Share-based statements are shown only for sites reporting at least 1,000 lbs, because a share of a very small total is not a meaningful signal. Reported pounds are self-reported estimates and do not measure toxicity or health risk.
Onyx Specialty Papers Inc. - Willow Mill files annual Form R disclosures to the EPA Toxics Release Inventory under EPCRA Section 313, classified under NAICS 322121 (Paper). Across 6 years of records spanning 2019–2024, the site has disclosed 135.9K lbs in cumulative toxic releases across 2 distinct chemicals, 1 of which (50%) carry a carcinogenic classification. Largest chemicals by pounds: Formaldehyde; Formic acid.
The dominant release pathway is air releases at 153.8K lbs (94.7% of total volume), followed by water discharges at 4.3%. Between 2019 and 2024, reported totals decreased by 13% - from 30.7K lbs to 26.6K lbs. Nearest other TRI reporters: Pittsfield Generating Co LP; O'Connell Oil Co Merrill Road Facility; Crane & Co. Inc.; Crane Pioneer Mill. Similar-scale peers outside Massachusetts: Loparex Inc; Bedford Technical Products LLC; Upm Raflatac Inc; Westrock - Solvay LLC.
TRI Form R values are self-reported estimates, not measured stack emissions, and treat every pound of reported chemical equally regardless of toxicity. Inclusion in the TRI database does not establish a health risk to nearby residents; it documents the annual reporting record that Onyx Specialty Papers Inc. - Willow Mill has filed with the EPA under federal community right-to-know requirements - open Pittsfield Generating Co LP for a different chemical mix before treating volume as risk.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Onyx Specialty Papers Inc. - Willow Mill's total reported releases fell from 28.1 thousand lb in 2022 to 24.6 thousand lb in 2023, based on EPA TRI filings.
- Onyx Specialty Papers Inc. - Willow Mill's off-site transfers fell from 294 lb in 2022 to 243 lb in 2023, based on EPA TRI filings.
- Onyx Specialty Papers Inc. - Willow Mill's air releases fell from 26.5 thousand lb in 2022 to 23.2 thousand lb in 2023, based on EPA TRI filings.
- Onyx Specialty Papers Inc. - Willow Mill's water releases fell from 1.3 thousand lb in 2022 to 1.1 thousand lb in 2023, based on EPA TRI filings.
Quick Facts
Compare this facility
See how Onyx Specialty Papers Inc. - Willow Mill stacks up against nearby facilities and the typical reporter.
6.1× more than the comparison
2.0× more than the comparison
Comparison reflects reported pounds and chemical counts, not toxicity or health risk. Averages cover facilities reporting any release.
How does this facility release toxic chemicals?
How Onyx Specialty Papers Inc. - Willow Mill releases toxic chemicals into the environment. Total: 162.5K lbs.
Emissions Trend Summary
From 2019 to 2024, total releases decreased by 13% (30.7K lbs to 26.6K lbs).
Reported total releases by year
Onyx Specialty Papers Inc. - Willow Mill - annual TRI totals
- 2019 0
2019
0 million lbs
- 2020 0
2020
0 million lbs
- 2021 0
2021
0 million lbs
- 2022 0
2022
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- 2023 0
2023
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- 2024 0
2024
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What this shows Year-over-year reported totals. TRI figures are self-reported estimates and can swing with production levels, waste-rock handling and reporting changes, not only with emissions controls.
| Year | Total | Chemicals |
|---|---|---|
| 2019 | 30.7K lbs | 2 |
| 2020 | 22.4K lbs | 2 |
| 2021 | 30.1K lbs | 2 |
| 2022 | 28.1K lbs | 2 |
| 2023 | 24.6K lbs | 2 |
| 2024 | 26.6K lbs | 2 |
Chemical Releases
Aggregated across all reporting years (2019–2024). 1 of 2 chemicals are carcinogens. Sorted by total release volume.
| Chemical | Total | Flags |
|---|---|---|
| Formaldehyde | 158.4K lbs | Carcinogen |
| Formic acid | 4.1K lbs | - |
Location
Nearest TRI Facilities to Onyx Specialty Papers Inc. - Willow Mill
Closest other reporters in Massachusetts - including Pittsfield Generating Co LP, O'Connell Oil Co Merrill Road Facility, Crane & Co. Inc., ordered by distance.
Similar Paper Facilities
Other Paper facilities with similar total release volumes (±80%), outside Massachusetts - e.g. Loparex Inc, Bedford Technical Products LLC, Upm Raflatac Inc.
About TRI Data
Data as of 2023 reporting year. Source: U.S. Environmental Protection Agency (EPA) Toxic Release Inventory.
Data comes from the EPA Toxic Release Inventory (TRI) program. Facilities that manufacture, process, or otherwise use listed toxic chemicals above threshold amounts are required to report annually to the EPA.
On this page the largest disclosed chemicals include Formaldehyde, Formic acid; nearby reporters include Pittsfield Generating Co LP. "Total releases" includes air, water, land, and off-site transfers for disposal, aggregated across available reporting years. Quantities are self-reported estimates, not measured stack emissions.
PlainEnviro presents this data without advocacy framing. The presence of a facility in the TRI database does not by itself indicate a health risk. For site-specific health questions, consult your local environmental or health agency.
Frequently Asked Questions
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Explore More Data for Massachusetts
What to do with this facility's data
From Onyx Specialty Papers Inc. - Willow Mill, open Pittsfield Generating Co LP or Loparex Inc next rather than reading rank alone.
- See whether releases reported by Onyx Specialty Papers Inc. - Willow Mill are rising or falling over time (watch Formaldehyde in the chemical mix). View trends
- Compare Onyx Specialty Papers Inc. - Willow Mill with nearby reporter Pittsfield Generating Co LP before treating rank as risk. Open Pittsfield Generating Co LP
- Cross-check similar-scale peer Loparex Inc outside Massachusetts. Open Loparex Inc
Rank and named neighbors (Pittsfield Generating Co LP, O'Connell Oil Co Merrill Road Facility) are disclosure volume only, not toxicity-weighted risk or enforcement status.
Read our methodology - how this data is sourced, computed, and verified.
Related
Sources & how this page was built
Every figure on this page traces to public, federal-government data on Onyx Specialty Papers Inc. - Willow Mill. The records below are the primary sources; our methodology explains how they are joined, computed, and verified.
- EPA Toxics Release Inventory (TRI) Basic Data Files - annual self-reported chemical-release filings. epa.gov
- EPA TRI Program, chemical & reporting reference - what each chemical is and how releases are counted. epa.gov
- EPA Facility Registry Service (FRS) - authoritative facility location and identity. epa.gov
- EPA Enforcement & Compliance History Online (ECHO) - regulatory and compliance context. echo.epa.gov
- EPA Envirofacts - the EPA data warehouse that exposes these datasets. enviro.epa.gov
Retrieved and formatted by PlainEnviro. TRI release totals are self-reported estimates, not measured stack emissions.
According to the U.S. Environmental Protection Agency, the Toxics Release Inventory has required annual industrial disclosure since its creation under the Emergency Planning and Community Right-to-Know Act in October 1986, and this facility's record is drawn from PlainEnviro's database of more than 25,000 EPA-tracked facilities through the 2023 reporting year; see our methodology for full source citations and refresh cadence.