County annual report · FIPS 53033
2023 King County, WA Power Outage Report
In 2023, customers in King County, WA went without power for an average of 3.3 hours, a total of 3.1M customer-hours (Washington average 2.6 hours). That ranks 14th worst of 33 Washington counties and 1874th of 2,977 nationally.
Compared with WA, the US and 2022
Coverage line is EAGLE-I's share of Washington customers tracked each year.
Biggest outages in King County, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | January 9, 2023 10:15 | January 22, 2023 19:15 | 13d 9h | 35,807 | 277K |
| 2 | November 30, 2023 15:30 | December 14, 2023 13:45 | 13d 22h | 32,985 | 226K |
| 3 | October 30, 2023 15:45 | November 6, 2023 04:00 | 6d 12h | 26,838 | 201K |
| 4 | January 4, 2023 15:45 | January 7, 2023 08:00 | 2d 16h | 21,938 | 368K |
| 5 | November 11, 2023 03:45 | November 15, 2023 14:15 | 4d 10h | 16,708 | 152K |
| 6 | February 3, 2023 17:30 | February 11, 2023 06:15 | 7d 12h | 15,478 | 62K |
| 7 | November 6, 2023 06:00 | November 8, 2023 15:15 | 2d 9h | 14,600 | 12K |
| 8 | November 25, 2023 12:30 | November 30, 2023 14:15 | 5d 1h | 14,194 | 113K |
| 9 | August 6, 2023 14:15 | August 19, 2023 09:15 | 12d 19h | 11,801 | 137K |
| 10 | February 20, 2023 15:15 | February 22, 2023 13:30 | 1d 22h | 11,667 | 79K |
Outage episodes by size in 2023: 99 reached 100+ customers, 59 reached 1,000+ customers, 11 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 King County reported on EIA Form 861 for 2023, 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 |
|---|---|---|---|---|---|
| Puget Sound Energy Inc | 2023 | 3.4 hrs | 1.30 | 2.8 hrs | 1.10 |
| City of Tacoma - (WA) | 2023 | 55 min | 0.60 | 55 min | 0.60 |
| City of Seattle - (WA) | 2023 | 1.6 hrs | 0.60 | 1.6 hrs | 0.60 |
| Bonneville Power Administration | - | - | - | - | - |
| Puget Sound Energy Inc,pugetsoundenergy | - | - | - | - | - |
| PUD No 1 of Chelan County | - | - | - | - | - |
| Tanner Electric Coop | - | - | - | - | - |
| City of Milton - (WA) | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about n/a of Washington's customers in 2023; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 963,744 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. King County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), King County, WA annual power outage report, 2023, 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/2023/washington/king-county