County annual report · FIPS 15001
2021 Hawaii County, HI Power Outage Report
In 2021, customers in Hawaii County, HI went without power for an average of 7.5 hours, a total of 654K customer-hours (Hawaii average 6.0 hours). That ranks 2nd worst of 4 Hawaii counties and 988th of 2,974 nationally.
Compared with HI, the US
Coverage line is EAGLE-I's share of Hawaii customers tracked each year.
Biggest outages in Hawaii County, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | December 5, 2021 23:00 | December 6, 2021 14:00 | 15h | 21,327 | 83K |
| 2 | July 3, 2021 00:15 | July 6, 2021 20:30 | 3d 20h | 14,109 | 47K |
| 3 | December 25, 2021 20:00 | December 25, 2021 20:15 | 15m | 11,926 | 2,982 |
| 4 | June 22, 2021 19:15 | June 23, 2021 02:15 | 7h | 6,845 | 14K |
| 5 | February 18, 2021 19:00 | February 18, 2021 21:30 | 2h 30m | 5,999 | 5,824 |
| 6 | December 6, 2021 15:30 | December 7, 2021 01:00 | 9h 30m | 5,899 | 29K |
| 7 | December 16, 2021 14:00 | December 16, 2021 22:00 | 8h | 5,488 | 23K |
| 8 | June 25, 2021 04:00 | June 25, 2021 04:45 | 45m | 4,684 | 1,580 |
| 9 | June 22, 2021 06:45 | June 22, 2021 07:00 | 15m | 4,034 | 1,009 |
| 10 | June 8, 2021 18:45 | June 9, 2021 00:15 | 5h 30m | 3,486 | 11K |
Outage episodes by size in 2021: 51 reached 100+ customers, 32 reached 1,000+ customers, 3 reached 10,000+ customers.
Utility reliability filed with the EIA
SAIDI (average outage time per customer) and SAIFI (average interruptions per customer) that utilities serving Hawaii County reported on EIA Form 861 for 2021, or their most recent earlier filing. Utility-wide figures, not county-specific.
| Utility | EIA year | SAIDI | SAIFI | SAIDI excl. major events | SAIFI excl. major events |
|---|---|---|---|---|---|
| Hawaii Electric Light Co Inc | 2020 | 2.1 hrs | 1.82 | 2.1 hrs | 1.82 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 100% of Hawaii's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 87,747 customers (ORNL modeled county customer count), including major storm days. It is comparable across counties but is not the SAIDI a utility files.
- An outage event is a continuous stretch with customers out; counts at 100, 1,000 and 10,000+ use its peak.
- Years loaded: 2015–2025. Hawaii County has data for 2021–2025.
Cite this report
MassOutage (massoutage.com), Hawaii County, HI annual power outage report, 2021, data as of Oct 3, 2026 02:41 UTC, sources: DOE EAGLE-I (https://eagle-i.doe.gov/); EAGLE-I modeled customer counts (MCC) (https://figshare.com/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2021/hawaii/hawaii-county