EPA TRI Facility · Electric Utilities
Hill Generating Station
Hilo, HI · Parent: Hawaiian Electric Industries Inc
- Total releases
- 760.3K lbs
- Chemicals reported
- 6
- Carcinogens
- 2
- Primary pathway
- Air Releases
AIR Form-R mix
Hill Generating Station: how the 760.3K lbs splits
760.3K lbs across all reported pathways
- Air Releases 760.1K lbs 100.0%
- Off-site Transfers 168 lbs <0.1%
- Land Disposal 1 lbs <0.1%
Hill Generating Station's 760.3K lbs Form-R total is AIR - air releases is 100.0% of the bar. Next segment: off-site transfers at <0.1%. Leading chemical by pounds: Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size).
Carcinogen-classified pounds vs other reported pounds
Same cumulative TRI total as above, split by EPA/IARC carcinogen classification on each chemical: pounds share, not chemical count. Classification is not a site health-risk score.
MID volume AIR pathway TRACE-CARC
Hill Generating Station is an EPA Toxics Release Inventory reporter in Hilo, HI, in the electric utilities sector. It reported 130.0K lbs of releases across 4 chemicals in 2023, and 760.3K lbs in total across its 2019-2023 reporting years. That ranks 1,534 of 25,986 TRI facilities nationwide by cumulative reported pounds, counting each facility over however many years it has filed. In Hawaii's 36 reporting TRI sites, pounds #1 is not chemical-count #1. Hill Generating Station is pounds #7 and chemical-count #16 at 760.3K lbs. Hawaiian Electric Co Inc Kahe Generating Station leads reported pounds (3.2M lbs) at 11 chemicals (chemical-count #5). Par Hawaii Refining LLC leads chemical count at 27 chemicals (841.7K lbs, pounds #5). Reported volume fell against 2022. Pounds reported are not a measure of toxicity or health risk. Nearest other TRI reporters: Aloha Petroleum Llc-Hilo West Terminal; Pacific Biodiesel LLC; Hawaii Electric Light Co Inc Puna Generating Station; U.S. Army Pohakuloa Training Area - Range Facility. Similar-scale Electric Utilities peers outside Hawaii: American Electric Power Conesville Plant; Guam Power Authority; Sierra Pacific Power Co North Valmy Station; Midamerican Energy Co George Neal North. Other Hawaiian Electric Industries Inc sites in this extract: Hawaiian Electric Co Inc Kahe Generating Station; Hawaiian Electric Co Inc Waiau Generating Station; Maui Electric Co Ltd Kahului Generating Station; Maui Electric Co Ltd Maalaea Generating Station. Largest disclosed chemicals by pounds: Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); Lead compounds; Lead And Lead Compounds; Polycyclic aromatic compounds.
Hill Generating Station stamps MID volume with a dominant AIR pathway (100.0% air releases) across 6 chemicals · 2 carcinogen-classified. Cumulative Form-R extract: 760.3K lbs (2019–2023). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include American Electric Power Conesville Plant and Guam Power Authority.
Hill Generating Station vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
760K lbs Top 6% higher than 94% 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
Hill Generating Station inside Hawaii's TRI pounds
Among the 513 Electric Utilities facilities in this database, Hill Generating Station reports the 201st-largest volume (760.3K lbs). This one site accounts for 62.2% of every pound reported in Hawaii. Its reported volume is concentrated rather than spread: Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) alone is more than 99.9% of the total. Scale peers outside Hawaii include American Electric Power Conesville Plant and Guam Power Authority.
County-dominant here means ≥25% of Hawaii's reported pounds (1.2M lbs county total). Shares only print when the site reports ≥1,000 lbs.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Hill Generating Station's total reported releases fell from 160.1 thousand lb in 2022 to 130.0 thousand lb in 2023, based on EPA TRI filings.
- Hill Generating Station's off-site transfers fell from 74 lb in 2022 to 0 lb in 2023, based on EPA TRI filings.
- Hill Generating Station's chemicals reported fell from 5 in 2022 to 4 in 2023, based on EPA TRI filings.
- Hill Generating Station's air releases fell from 160.0 thousand lb in 2022 to 130.0 thousand lb in 2023, based on EPA TRI filings.
Hill Generating Station Form-R facts
Compare this facility
See how Hill Generating Station stacks up against nearby facilities and the typical reporter.
162.9× more than the comparison
25% 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 Hill Generating Station releases toxic chemicals into the environment. Total: 760.3K lbs.
Emissions Trend Summary
From 2019 to 2023, total releases decreased by 24% (170.1K lbs to 130.0K lbs).
Hill Generating Station: annual Form-R pounds
MID site · AIR pathway · TRI years 2019–2023
- 2019 0
- 2020 0
- 2021 0
- 2022 0
- 2023 0
What this shows Hill Generating Station year-over-year reported totals (decreased by 24% 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: Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size).
| Year | Total | Chemicals |
|---|---|---|
| 2019 | 170.1K lbs | 4 |
| 2020 | 160.0K lbs | 5 |
| 2021 | 140.0K lbs | 4 |
| 2022 | 160.1K lbs | 5 |
| 2023 | 130.0K lbs | 4 |
Chemical Releases
Aggregated across all reporting years (2019–2023). 2 of 6 chemicals are carcinogens. Sorted by total release volume.
| Chemical | Total | Flags |
|---|---|---|
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 760.0K lbs | - |
| Lead compounds | 136 lbs | - |
| Lead And Lead Compounds | 99 lbs | - |
| Polycyclic aromatic compounds | 18 lbs | Carcinogen |
| Naphthalene | 17 lbs | Carcinogen |
| Benzo[g,h,i]perylene | 0 lbs | - |
Hill Generating Station · AIR-pathway site
Nearest TRI Facilities to Hill Generating Station
Closest other reporters in Hawaii - including Aloha Petroleum Llc-Hilo West Terminal, Pacific Biodiesel LLC, Hawaii Electric Light Co Inc Puna Generating Station, ordered by distance.
Showing 8 of 35 other reporting facilities in Hawaii.
Similar Electric Utilities Facilities
Other Electric Utilities facilities with similar total release volumes (±80%), outside Hawaii - e.g. American Electric Power Conesville Plant, Guam Power Authority, Sierra Pacific Power Co North Valmy Station.
Compare beyond Hawaii
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest Hill Generating Station on cumulative reported pounds (760.3K lbs) and distinct chemical count (6). Release-pound peers include Onsemi, Basf Corp, Barrier Reef Pools. Chemical-count peers include Eaton Intelligent Power Ltd, Leoni Wire Inc, Turf Care Supply-Hatfield Plant. 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.
- Onsemi Gresham, OR · Computers and Electronic Products 759.9K lbs reported
- Basf Corp Seneca, SC · Primary Metals 759.6K lbs reported
- Barrier Reef Pools Timmonsville, SC · Transportation Equipment 759.1K lbs reported
- Ball Metal Beverage Container Corp Saratoga Springs, NY · Fabricated Metals 758.9K lbs reported
Similar chemical count
Nearest out-of-state reporters by distinct Form-R chemicals (deduped against the release-pound neighborhood).
Other Hawaiian Electric Industries Inc Facilities
Same-parent TRI sites ranked by reported releases - including Hawaiian Electric Co Inc Kahe Generating Station, Hawaiian Electric Co Inc Waiau Generating Station, Maui Electric Co Ltd Kahului Generating Station.
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 Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Lead compounds, Lead And Lead Compounds, Polycyclic aromatic compounds; nearby reporters include Aloha Petroleum Llc-Hilo West Terminal. Hill Generating Station stamps MID volume · AIR pathway · TRACE-CARC 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 Hill Generating Station TRI extract (MID · AIR · TRACE-CARC · lead Sulfuric 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.
Hill Generating Station totals are self-reported EPCRA §313 estimates for Hilo, HI, latest year 2023. Form-R rows span 2019–2023 (5 years). NAICS 221112 · Electric Utilities. 62.2% of Hawaii TRI pounds in this extract. Nearest ABS peer: Onsemi (Δ 396 lbs). Pounds ≠ exposure.
Hill Generating Station stamps MID volume · AIR pathway · TRACE-CARC · lead Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size). 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