County annual report · FIPS 53033
2025 King County, WA Power Outage Report
In 2025, customers in King County, WA went without power for an average of 6.1 hours, a total of 5.9M customer-hours (Washington average 7.0 hours). That ranks 18th worst of 33 Washington counties and 1274th of 3,000 nationally.
Compared with WA, the US and 2024
Coverage line is EAGLE-I's share of Washington customers tracked each year.
Biggest outages in King County, 2025
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 30, 2025 06:00 | November 27, 2025 08:45 | 58d 2h | 122,136 | 2.4M |
| 2 | February 17, 2025 14:45 | March 9, 2025 08:15 | 19d 17h | 63,233 | 792K |
| 3 | July 14, 2025 13:15 | July 19, 2025 08:45 | 4d 19h | 22,603 | 117K |
| 4 | November 27, 2025 15:30 | January 1, 2026 00:00 | 34d 8h | 18,890 | 670K |
| 5 | January 7, 2025 14:30 | February 17, 2025 03:45 | 40d 13h | 16,314 | 289K |
| 6 | May 27, 2025 12:00 | June 29, 2025 12:30 | 33d | 13,017 | 303K |
| 7 | March 20, 2025 23:30 | April 12, 2025 07:00 | 22d 7h | 9,646 | 177K |
| 8 | May 21, 2025 10:15 | May 27, 2025 09:00 | 5d 22h | 9,139 | 63K |
| 9 | July 19, 2025 10:00 | September 1, 2025 23:30 | 44d 13h | 9,083 | 428K |
| 10 | September 2, 2025 07:15 | September 24, 2025 11:15 | 22d 4h | 8,263 | 192K |
Outage episodes by size in 2025: 21 reached 100+ customers, 16 reached 1,000+ customers, 6 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 2025, 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 | 2024 | 19.9 hrs | 2.20 | 3.4 hrs | 1.20 |
| City of Tacoma - (WA) | 2024 | 2.8 hrs | 0.93 | 80 min | 0.55 |
| PUD No 1 of Chelan County | 2024 | 2.9 hrs | 0.96 | 1.6 hrs | 0.74 |
| City of Seattle - (WA) | 2024 | 5.4 hrs | 1.12 | 1.8 hrs | 0.76 |
| Bonneville Power Administration | - | - | - | - | - |
| Puget Sound Energy Inc,pugetsoundenergy | - | - | - | - | - |
| 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 2025; 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, 2025, 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/2025/washington/king-county