EPA TRI Facility · Electric Utilities
Hamakua Energy Plant
Honokaa, HI · Parent: Hamakua Energy LLC
- Total releases
- 24.8K lbs
- Chemicals reported
- 7
- Carcinogens
- 2
- Primary pathway
- Air Releases
AIR Form-R mix
Hamakua Energy Plant: how the 24.8K lbs splits
24.8K lbs across all reported pathways
- Air Releases 24.8K lbs 100.0%
- Land Disposal 1 lbs <0.1%
Hamakua Energy Plant's 24.8K lbs Form-R total is AIR - air releases is 100.0% of the bar. Next segment: land disposal at <0.1%. Leading chemical by pounds: Ammonia.
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.
LIGHT volume AIR pathway CARC-LEAN
Hamakua Energy Plant is an EPA Toxics Release Inventory reporter in Honokaa, HI, in the electric utilities sector. It reported 5.5K lbs of releases across 7 chemicals in 2023, and 24.8K lbs in total across its 2019-2023 reporting years. That ranks 7,760 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. Hamakua Energy Plant is pounds #20 and chemical-count #13 at 24.8K 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 rose against 2022. Pounds reported are not a measure of toxicity or health risk. Nearest other TRI reporters: U.S. Army Pohakuloa Training Area - Range Facility; Aloha Petroleum Llc-Hilo West Terminal; Hill Generating Station; Pacific Biodiesel LLC. Similar-scale Electric Utilities peers outside Hawaii: Hammond Steam Electric Generating Plant; Sibley Generating Station; Pittsfield Generating Co LP; Will County Generating Station. Largest disclosed chemicals by pounds: Ammonia; n-Hexane; Benzene; Cyclohexane.
Hamakua Energy Plant stamps LIGHT volume with a dominant AIR pathway (100.0% air releases) across 7 chemicals · 2 carcinogen-classified. Cumulative Form-R extract: 24.8K lbs (2019–2023). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include Hammond Steam Electric Generating Plant and Sibley Generating Station.
Hamakua Energy Plant vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
25K lbs Top 30% higher than 70% 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
Hamakua Energy Plant: Ammonia-led volume
Among the 513 Electric Utilities facilities in this database, Hamakua Energy Plant reports the 362nd-largest volume (24.8K lbs). Its reported volume is concentrated rather than spread: Ammonia alone is 78.4% of the total. Scale peers outside Hawaii include Hammond Steam Electric Generating Plant and Sibley Generating Station.
Concentrated means ≥60% of Hamakua Energy Plant's pounds in one chemical - here Ammonia at 78.4%. Not a toxicity score.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Hamakua Energy Plant's total reported releases rose from 4.6 thousand lb in 2022 to 5.5 thousand lb in 2023, based on EPA TRI filings.
- Hamakua Energy Plant's air releases rose from 4.6 thousand lb in 2022 to 5.5 thousand lb in 2023, based on EPA TRI filings.
Hamakua Energy Plant Form-R facts
Compare this facility
See how Hamakua Energy Plant stacks up against nearby facilities and the typical reporter.
90% less than the comparison
75% 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 Hamakua Energy Plant releases toxic chemicals into the environment. Total: 24.8K lbs.
Emissions Trend Summary
From 2019 to 2023, total releases increased by 25% (4.4K lbs to 5.5K lbs).
Hamakua Energy Plant: 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 Hamakua Energy Plant year-over-year reported totals (increased by 25% 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 | 4.4K lbs | 7 |
| 2020 | 5.1K lbs | 7 |
| 2021 | 5.0K lbs | 7 |
| 2022 | 4.6K lbs | 7 |
| 2023 | 5.5K lbs | 7 |
Chemical Releases
Aggregated across all reporting years (2019–2023). 2 of 7 chemicals are carcinogens. Sorted by total release volume.
| Chemical | Total | Flags |
|---|---|---|
| Ammonia | 19.4K lbs | - |
| n-Hexane | 3.5K lbs | - |
| Benzene | 886 lbs | Carcinogen |
| Cyclohexane | 550 lbs | - |
| Toluene | 209 lbs | - |
| Xylene (mixed isomers) | 141 lbs | - |
| Ethylbenzene | 42 lbs | Carcinogen |
Hamakua Energy Plant · AIR-pathway site
Nearest TRI Facilities to Hamakua Energy Plant
Closest other reporters in Hawaii - including U.S. Army Pohakuloa Training Area - Range Facility, Aloha Petroleum Llc-Hilo West Terminal, Hill 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. Hammond Steam Electric Generating Plant, Sibley Generating Station, Pittsfield Generating Co LP.
Compare beyond Hawaii
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest Hamakua Energy Plant on cumulative reported pounds (24.8K lbs) and distinct chemical count (7). Release-pound peers include Yara Freeport LLC, Northrop Grumman Systems Corp, Ozark Materials LLC an Ingevity Co. Chemical-count peers include Hubbell Caribe Ltd, Celanese Microcircuits Industries Ltd., Virgin Islands Water & Power Authority. 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.
- Yara Freeport LLC Freeport, TX · Chemicals 24.8K lbs reported
- Northrop Grumman Systems Corp Linthicum, MD · Computers and Electronic Products 24.8K lbs reported
- Ozark Materials LLC an Ingevity Co Marion, IN · Chemicals 24.8K lbs reported
- Poet Biorefning - Preston LLC Preston, MN · Chemicals 24.8K lbs reported
Similar chemical count
Nearest out-of-state reporters by distinct Form-R chemicals (deduped against the release-pound neighborhood).
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, n-Hexane, Benzene, Cyclohexane; nearby reporters include U.S. Army Pohakuloa Training Area - Range Facility. Hamakua Energy Plant stamps LIGHT volume · AIR pathway · CARC-LEAN 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 Hamakua Energy Plant TRI extract (LIGHT · AIR · CARC-LEAN · lead Ammonia) joins EPA Form-R filings with facility identity - reported pounds, not a health-risk rating.
Hamakua Energy Plant totals are self-reported EPCRA §313 estimates for Honokaa, HI, latest year 2023. Form-R rows span 2019–2023 (5 years). NAICS 221112 · Electric Utilities. 2.0% of Hawaii TRI pounds in this extract. Nearest ABS peer: Yara Freeport LLC (Δ 7 lbs). Pounds ≠ exposure.
Hamakua Energy Plant stamps LIGHT volume · AIR pathway · CARC-LEAN · 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