EPA TRI Facility · Computers and Electronic Products
Diodes US Manufacturing Inc
South Portland, ME · Parent: Diodes Inc
- Total releases
- 14.0K lbs
- Chemicals reported
- 4
- Latest report
- 2023
- Primary pathway
- Air Releases
MIXED Form-R mix
Diodes US Manufacturing Inc: how the 15.8K lbs splits
15.8K lbs across all reported pathways
- Air Releases 9.4K lbs 60.0%
- Off-site Transfers 6.3K lbs 40.0%
Diodes US Manufacturing Inc's 15.8K lbs Form-R total is MIXED - air releases is 60.0% of the bar. Next segment: off-site transfers at 40.0%. Leading chemical by pounds: Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size).
LIGHT volume MIXED pathway CLEAN
Diodes US Manufacturing Inc is an EPA Toxics Release Inventory reporter in South Portland, ME, in the computers and electronic products sector. It reported 1.8K lbs of releases across 3 chemicals in 2024, and 14.0K lbs in total across its 2019-2024 reporting years. That ranks 9,049 of 25,986 TRI facilities nationwide by cumulative reported pounds, counting each facility over however many years it has filed. In Maine's 81 reporting TRI sites, Sappi N.a. Inc. - Somerset Operations leads both reported pounds (10.6M lbs) and chemical count (31 chemicals). The two rankings do not invert in this pool. Reported volume fell against 2022. Pounds reported are not a measure of toxicity or health risk. Nearest other TRI reporters: Texas Instruments Inc; Nichols Portland; Silvex Inc; Clean Harbors Environmental Services Inc.. Similar-scale Computers and Electronic Products peers outside Maine: Illumina; Supelco; Infinera Corp; Apct Inc. Largest disclosed chemicals by pounds: Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); Hydrogen fluoride; Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); Nitric acid.
Diodes US Manufacturing Inc is a LIGHT · MIXED-pathway Form-R site in South Portland, ME: 14.0K lbs across 4 chemicals. No single media clears 70% of the bar (lead segment air releases at 60.0%). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include Illumina and Supelco.
Diodes US Manufacturing Inc vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
14K lbs Top 35% higher than 65% 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
Diodes US Manufacturing Inc in the Computers and Electronic Products sector extract
Among the 760 Computers and Electronic Products facilities in this database, Diodes US Manufacturing Inc reports the 139th-largest volume, placing it in the top 18.3% of its sector. Scale peers outside Maine include Illumina and Supelco.
Sector rank uses reported TRI pounds only. Share callouts need ≥1,000 lbs so tiny totals cannot mint a false signal.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Diodes US Manufacturing Inc's total reported releases fell from 2.0 thousand lb in 2022 to 1.8 thousand lb in 2023, based on EPA TRI filings.
- Diodes US Manufacturing Inc's off-site transfers rose from 110 lb in 2022 to 156 lb in 2023, based on EPA TRI filings.
- Diodes US Manufacturing Inc's air releases fell from 1.9 thousand lb in 2022 to 1.6 thousand lb in 2023, based on EPA TRI filings.
Diodes US Manufacturing Inc Form-R facts
Compare this facility
See how Diodes US Manufacturing Inc stacks up against nearby facilities and the typical reporter.
94% less than the comparison
20% less 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 Diodes US Manufacturing Inc releases toxic chemicals into the environment. Total: 15.8K lbs.
Emissions Trend Summary
From 2019 to 2024, total releases increased by 35% (1.3K lbs to 1.8K lbs).
Diodes US Manufacturing Inc: annual Form-R pounds
LIGHT site · MIXED pathway · TRI years 2019–2024
- 2019 0
- 2020 0
- 2021 0
- 2022 0
- 2023 0
- 2024 0
What this shows Diodes US Manufacturing Inc year-over-year reported totals (increased by 35% from 2019 to 2024). 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: Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size).
| Year | Total | Chemicals |
|---|---|---|
| 2019 | 1.3K lbs | 4 |
| 2020 | 1.3K lbs | 4 |
| 2021 | 7.7K lbs | 3 |
| 2022 | 2.0K lbs | 3 |
| 2023 | 1.8K lbs | 3 |
| 2024 | 1.8K lbs | 3 |
Chemical Releases
Aggregated across all reporting years (2019–2024). Sorted by total release volume.
| Chemical | Total | Flags |
|---|---|---|
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 9.1K lbs | - |
| Hydrogen fluoride | 6.1K lbs | - |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 552 lbs | - |
| Nitric acid | 11 lbs | - |
Diodes US Manufacturing Inc in Cumberland
Nearest TRI Facilities to Diodes US Manufacturing Inc
Closest other reporters in Maine - including Texas Instruments Inc, Nichols Portland, Silvex Inc, ordered by distance.
Showing 8 of 80 other reporting facilities in Maine.
Similar Computers and Electronic Products Facilities
Other Computers and Electronic Products facilities with similar total release volumes (±80%), outside Maine - e.g. Illumina, Supelco, Infinera Corp.
Compare beyond Maine
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest Diodes US Manufacturing Inc on cumulative reported pounds (14.0K lbs) and distinct chemical count (4). Release-pound peers include Conagra Foods - Sylvester, Blues City Brewery, Mercer Forge Corp. Chemical-count peers include Hamilton Sundstrand de Puerto Rico Inc., Abb Installation Products Caribe LLC, Solenis 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).
- Hamilton Sundstrand de Puerto Rico Inc. Santa Isabel, PR · Transportation Equipment 4 chemicals
- Abb Installation Products Caribe LLC Vega Baja, PR · Electrical Equipment 4 chemicals
- Solenis LLC Chicopee, MA · Chemicals 4 chemicals
- Adhesive Applications Inc. - O'Neill St Easthampton Easthampton, MA · Miscellaneous Manufacturing 4 chemicals
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 Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Hydrogen fluoride, Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Nitric acid; nearby reporters include Texas Instruments Inc. Diodes US Manufacturing Inc stamps LIGHT volume · MIXED 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 Diodes US Manufacturing Inc TRI extract (LIGHT · MIXED · CLEAN · lead Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)) joins EPA Form-R filings with facility identity - reported pounds, not a health-risk rating.
Diodes US Manufacturing Inc totals are self-reported EPCRA §313 estimates for South Portland, ME, latest year 2023. Form-R rows span 2019–2024 (6 years). NAICS 334413 · Computers and Electronic Products. 1.4% of Cumberland TRI pounds in this extract. Nearest ABS peer: Blues City Brewery (Δ 2 lbs). Pounds ≠ exposure.
Diodes US Manufacturing Inc stamps LIGHT · MIXED pathway (air releases leads at 60.0%). Pipeline-rendered EPA Form-R only - no editor-typed pounds. 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