County annual report · FIPS 15003
2021 Honolulu County, HI Power Outage Report
In 2021, customers in Honolulu County, HI went without power for an average of 4.0 hours, a total of 1.2M customer-hours (Hawaii average 6.0 hours). That ranks 4th worst of 4 Hawaii counties and 1540th of 2,974 nationally.
Compared with HI, the US and 2020
Coverage line is EAGLE-I's share of Hawaii customers tracked each year.
Biggest outages in Honolulu 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 | September 23, 2021 13:15 | September 25, 2021 06:15 | 1d 17h | 27,525 | 75K |
| 2 | November 29, 2021 03:30 | November 30, 2021 06:30 | 1d 3h | 26,285 | 29K |
| 3 | March 10, 2021 16:30 | March 14, 2021 06:30 | 3d 14h | 25,482 | 92K |
| 4 | April 16, 2021 16:45 | April 18, 2021 02:30 | 1d 9h | 17,854 | 24K |
| 5 | April 12, 2021 14:30 | April 13, 2021 07:30 | 17h | 16,183 | 4,296 |
| 6 | March 15, 2021 01:45 | March 18, 2021 09:45 | 3d 8h | 13,957 | 42K |
| 7 | February 2, 2021 10:45 | February 7, 2021 13:15 | 5d 2h | 13,277 | 102K |
| 8 | January 18, 2021 03:45 | January 22, 2021 11:15 | 4d 7h | 13,023 | 142K |
| 9 | August 21, 2021 14:30 | August 22, 2021 11:00 | 20h 30m | 12,127 | 29K |
| 10 | May 14, 2021 17:45 | May 17, 2021 10:15 | 2d 16h | 11,297 | 16K |
Outage episodes by size in 2021: 184 reached 100+ customers, 105 reached 1,000+ customers, 12 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 Honolulu 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 |
|---|---|---|---|---|---|
| Hawaiian Electric Co Inc | 2020 | 1.6 hrs | 0.87 | 72 min | 0.77 |
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 ÷ 308,098 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. Honolulu County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Honolulu 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/honolulu-county