EPA TRI Facility · Fabricated Metals
Diamond Heat Treat LLC
Rockford, IL · Parent: Thermal Process Holdings
- Total releases
- 91.5K lbs
- Chemicals reported
- 1
- Latest report
- 2023
- Primary pathway
- Air Releases
AIR Form-R mix
Diamond Heat Treat LLC: how the 91.5K lbs splits
91.5K lbs across all reported pathways
- Air Releases 91.5K lbs 100.0%
Diamond Heat Treat LLC's 91.5K lbs Form-R total is AIR - air releases is 100.0% of the bar. Off-site transfers stay separate from air, water, and land releases. Leading chemical by pounds: Ammonia.
LIGHT volume AIR pathway CLEAN
Diamond Heat Treat LLC is an EPA Toxics Release Inventory reporter in Rockford, IL, in the fabricated metals sector. It reported 13.2K lbs of releases across 1 chemical in 2023, and 91.5K lbs in total across its 2019-2023 reporting years. That ranks 4,778 of 25,986 TRI facilities nationwide by cumulative reported pounds, counting each facility over however many years it has filed. In Illinois's 951 reporting TRI sites, pounds #1 is not chemical-count #1. Diamond Heat Treat LLC is pounds #190 and chemical-count #744 at 91.5K lbs. Prairie State Generating Co leads reported pounds (37.9M lbs) at 31 chemicals (chemical-count #8). Veolia N.a. Inc. leads chemical count at 141 chemicals (1.9M lbs, pounds #34). Reported volume fell against 2022. Pounds reported are not a measure of toxicity or health risk. Nearest other TRI reporters: Bluewater Thermal Solutions - Rockford; Chem Processing Inc.; Concentric Rockford Inc; Viking Chemical Co. Similar-scale Fabricated Metals peers outside Illinois: C & R Plating Corp; Hager Cos; Edcoat LLC; Chrometech of Wisconsin. Other Thermal Process Holdings sites in this extract: Hudapack Metal Treating Inc. Largest disclosed chemicals by pounds: Ammonia.
Diamond Heat Treat LLC stamps LIGHT volume with a dominant AIR pathway (100.0% air releases) across 1 chemical. Cumulative Form-R extract: 91.5K lbs (2019–2023). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include C & R Plating Corp and Hager Cos.
Diamond Heat Treat LLC vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
91K lbs Top 18% higher than 82% of 25,986 reporting TRI facilities
Each bar is a $1M-wide band; taller bars hold more reporting TRI facilities. The dashed line and filled bar mark this facility. Hover, focus, or tap a bar for its full count, share, and position.
Source U.S. Environmental Protection Agency, Toxics Release Inventory · 2023 reporting year
Diamond Heat Treat LLC: Ammonia-led volume
Among the 3,421 Fabricated Metals facilities in this database, Diamond Heat Treat LLC reports the 494th-largest volume, placing it in the top 14.4% of its sector. Its reported volume is concentrated rather than spread: Ammonia alone is 100% of the total. Scale peers outside Illinois include C & R Plating Corp and Hager Cos.
Concentrated means ≥60% of Diamond Heat Treat LLC's pounds in one chemical - here Ammonia at 100%. Not a toxicity score.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Diamond Heat Treat LLC's total reported releases fell from 17.2 thousand lb in 2022 to 13.2 thousand lb in 2023, based on EPA TRI filings.
- Diamond Heat Treat LLC's air releases fell from 17.2 thousand lb in 2022 to 13.2 thousand lb in 2023, based on EPA TRI filings.
Diamond Heat Treat LLC Form-R facts
Compare this facility
See how Diamond Heat Treat LLC stacks up against nearby facilities and the typical reporter.
132.0× more than the comparison
About the same as 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 Diamond Heat Treat LLC releases toxic chemicals into the environment. Total: 91.5K lbs.
Emissions Trend Summary
From 2019 to 2023, total releases decreased by 42% (22.9K lbs to 13.2K lbs).
Diamond Heat Treat LLC: annual Form-R pounds
LIGHT site · AIR pathway · TRI years 2019–2023
- 2019 0
- 2020 0
- 2021 0
- 2022 0
- 2023 0
What this shows Diamond Heat Treat LLC year-over-year reported totals (decreased by 42% from 2019 to 2023). TRI figures are self-reported estimates and can swing with production, waste handling, and reporting changes, not only with controls. Lead chemical in the extract: Ammonia.
| Year | Total | Chemicals |
|---|---|---|
| 2019 | 22.9K lbs | 1 |
| 2020 | 17.6K lbs | 1 |
| 2021 | 20.7K lbs | 1 |
| 2022 | 17.2K lbs | 1 |
| 2023 | 13.2K lbs | 1 |
Chemical Releases
Aggregated across all reporting years (2019–2023). Sorted by total release volume.
| Chemical | Total | Flags |
|---|---|---|
| Ammonia | 91.5K lbs | - |
Diamond Heat Treat LLC · AIR-pathway site
Nearest TRI Facilities to Diamond Heat Treat LLC
Closest other reporters in Illinois - including Bluewater Thermal Solutions - Rockford, Chem Processing Inc., Concentric Rockford Inc, ordered by distance.
Showing 8 of 950 other reporting facilities in Illinois.
Similar Fabricated Metals Facilities
Other Fabricated Metals facilities with similar total release volumes (±80%), outside Illinois - e.g. C & R Plating Corp, Hager Cos, Edcoat LLC.
Compare beyond Illinois
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest Diamond Heat Treat LLC on cumulative reported pounds (91.5K lbs) and distinct chemical count (1). Release-pound peers include Ineos Polypropylene LLC, Riceland Foods Inc. - Stuttgart Rice Div, Hexcel Corp. Chemical-count peers include Ecoelectrica LP, Planta Penuelas, Tallaboa Puerto Rico LLC. Neighborhoods are forced disjoint so each axis surfaces a different set of sites.
Similar reported release pounds
Nearest out-of-state reporters (≥1,000 lbs) by absolute TRI pounds, not same-industry or same-county neighbors.
Similar chemical count
Nearest out-of-state reporters by distinct Form-R chemicals (deduped against the release-pound neighborhood).
Other Thermal Process Holdings Facilities
Same-parent TRI sites ranked by reported releases - including Hudapack Metal Treating Inc.
About TRI Data
Data as of 2023 reporting year. Source: U.S. Environmental Protection Agency (EPA) Toxic Release Inventory.
On this page the largest disclosed chemicals include Ammonia; nearby reporters include Bluewater Thermal Solutions - Rockford. Diamond Heat Treat LLC stamps LIGHT volume · AIR pathway · CLEAN carcinogen-lbs on this Form-R extract. Totals are self-reported estimates under EPCRA §313, not measured stack emissions or a health-risk score.
Use and verify this record
This Diamond Heat Treat LLC TRI extract (LIGHT · AIR · CLEAN · lead Ammonia) joins EPA Form-R filings with facility identity - reported pounds, not a health-risk rating.
Diamond Heat Treat LLC totals are self-reported EPCRA §313 estimates for Rockford, IL, latest year 2023. Form-R rows span 2019–2023 (5 years). NAICS 332811 · Fabricated Metals. 3.2% of Winnebago TRI pounds in this extract. Nearest ABS peer: Ineos Polypropylene LLC (Δ 5 lbs). Pounds ≠ exposure.
Diamond Heat Treat LLC stamps LIGHT volume · AIR pathway · CLEAN · lead Ammonia. PlainEnviro renders this EPA Form-R extract from its pipeline; no figure is typed in by an editor. Corrections: editorial policy.
All federal data sources used on this page
- EPA Toxics Release Inventory (TRI) Basic Data Files - annual self-reported chemical-release filings. epa.gov
- EPA TRI Program reference - how chemicals and reported releases are counted. epa.gov
- EPA Facility Registry Service - facility location and identity. epa.gov
- EPA ECHO - regulatory and compliance context. epa.gov
- EPA Envirofacts - the EPA data warehouse exposing these datasets. epa.gov