HAWAIIAN ELECTRIC COMPANY (HECO) - WAIAU GENERATING STATION
PEARL CITY, HI · HONOLULU COUNTY · NAICS 221112
Data updated May 2026
HAWAIIAN ELECTRIC COMPANY (HECO) - WAIAU GENERATING STATION sits in the upper third of EPA GHGRP reporters by latest CO₂e (#575 of 8,713 nationally, #2 of 29 in HI).
- National rank #575 of 8,713 GHGRP facilities
- #2 of 29 in HI
- #424 of 1,732 in Power Plants
- 24.6% of HAWAIIAN ELECTRIC INDUSTRIES parent CO₂e
- 2023 mix: 0.3% non-CO₂ (N₂O-led)
- +26.2% since 2011
HAWAIIAN ELECTRIC COMPANY (HECO) - WAIAU GENERATING STATION vs all U.S. GHGRP facilities
Where this site's latest reported Scope 1 CO₂e sits among every EPA GHGRP reporting facility
1,105,796 575th of 8713 higher than 8,138 of 8,713 facilities
GHGRP facilities, banded by latest reported CO₂e (MT)
Each bar is a band; taller bars hold more facilities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA Greenhouse Gas Reporting Program · 2023
Facility footprint context
This site accounts for 24.6% of HAWAIIAN ELECTRIC INDUSTRIES reported parent CO₂e (1.1M MT of 4.5M MT ; #2 of 11 GHGRP facilities under that parent ). Inside the EPA Power Plants sector it ranks #424 of 1,732 facilities by latest CO₂e. Shares use GHGRP facility rollups only, not Scope 2/3 or non-reporting sites.
2023 gas mix desk
Of 1.1M MT CO₂e reported for 2023, non-CO₂ gases are 0.3% , led by N₂O at 0.2% . Component shares use this facility's GHGRP CO₂ / CH₄ / N₂O rows for that year (already CO₂e-weighted).
- CO₂
- 99.7%
- 1.1M MT
- CH₄
- 0.1%
- 1K MT
- N₂O
- 0.2%
- 3K MT
Emissions growth across reporting years
| Year | Total CO2e (MT) |
|---|---|
| 2023 | 1,105,796 |
| 2022 | 791,957 |
| 2021 | 751,162 |
| 2020 | 630,457 |
| 2019 | 857,248 |
| 2018 | 849,126 |
| 2017 | 813,388 |
| 2016 | 798,384 |
| 2015 | 1,013,614 |
| 2014 | 882,924 |
| 2013 | 861,901 |
| 2012 | 862,826 |
| 2011 | 876,051 |
Facility insight: HAWAIIAN ELECTRIC COMPANY (HECO) - WAIAU GENERATING STATION
HAWAIIAN ELECTRIC COMPANY (HECO) - WAIAU GENERATING STATION (GHGRP ID 1007845) is a high-volume reporter at 1.1M MT CO₂e in 2023 from PEARL CITY, HI (#575 of 8,713 nationally) under Power Plants (NAICS 221112).
From 2011 to 2023, reported CO₂e rose 26.2% (peak 1.1M MT). This facility has filed every year from 2011 to 2023, a complete 13-year record.
Frequently Asked Questions
Where does HAWAIIAN ELECTRIC COMPANY (HECO) - WAIAU GENERATING STATION rank among U.S. GHGRP facilities? ▼
According to the EPA Greenhouse Gas Reporting Program, HAWAIIAN ELECTRIC COMPANY (HECO) - WAIAU GENERATING STATION ranks #575 of 8,713 reporting facilities by latest reported CO₂e, and #2 of 29 facilities in HI (same sort as the state facility table). See /methodology#corpus-placement.
What share of GHGRP facilities report less CO₂e than HAWAIIAN ELECTRIC COMPANY (HECO) - WAIAU GENERATING STATION? ▼
HAWAIIAN ELECTRIC COMPANY (HECO) - WAIAU GENERATING STATION's 1.1M MT CO₂e is higher than 8,138 of the 8,713 GHGRP facilities with reported emissions (93%), an exact count from the full corpus, not an estimate.
How much CO2 does HAWAIIAN ELECTRIC COMPANY (HECO) - WAIAU GENERATING STATION emit? ▼
HAWAIIAN ELECTRIC COMPANY (HECO) - WAIAU GENERATING STATION reported 1.1M MT CO2e in 2023.
What share of HAWAIIAN ELECTRIC INDUSTRIES does HAWAIIAN ELECTRIC COMPANY (HECO) - WAIAU GENERATING STATION represent? ▼
HAWAIIAN ELECTRIC COMPANY (HECO) - WAIAU GENERATING STATION accounts for 24.6% of HAWAIIAN ELECTRIC INDUSTRIES's reported GHGRP CO₂e (1.1M MT of 4.5M MT), ranking #2 of 11 facilities under that parent.
What is HAWAIIAN ELECTRIC COMPANY (HECO) - WAIAU GENERATING STATION's 2023 CO₂ / CH₄ / N₂O mix? ▼
In 2023, non-CO₂ gases were 0.3% of reported CO₂e at HAWAIIAN ELECTRIC COMPANY (HECO) - WAIAU GENERATING STATION, with N₂O the larger non-CO₂ share at 0.2% (CO₂ 99.7%). Shares use the facility's GHGRP gas components for that year.
Where does HAWAIIAN ELECTRIC COMPANY (HECO) - WAIAU GENERATING STATION rank inside Power Plants? ▼
Among EPA GHGRP facilities tagged Power Plants, HAWAIIAN ELECTRIC COMPANY (HECO) - WAIAU GENERATING STATION ranks #424 of 1,732 by latest reported CO₂e.
Is HAWAIIAN ELECTRIC COMPANY (HECO) - WAIAU GENERATING STATION reducing emissions? ▼
Over 13 reporting years (2011–2023), HAWAIIAN ELECTRIC COMPANY (HECO) - WAIAU GENERATING STATION's emissions have increased by 26.2%. This may reflect expanded operations or increased production.
Nationwide facilities with similar CO₂e or sector
Peer sets outside HI for a top-third GHGRP emitter: CO₂e totals first, then Power Plants neighbors.
Similar reported CO₂e
Nearest latest-year facility totals outside HI (1.1M MT here).
Similar Power Plants CO₂e
Nearest same-sector facility totals outside HI.