County annual report · FIPS 53033
2020 King County, WA Power Outage Report
In 2020, customers in King County, WA went without power for an average of 3.5 hours, a total of 3.4M customer-hours (Washington average 4.2 hours). That ranks 22nd worst of 37 Washington counties and 1732nd of 3,019 nationally.
Compared with WA, the US and 2019
Coverage line is EAGLE-I's share of Washington customers tracked each year.
Biggest outages in King County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | October 6, 2020 13:15 | October 20, 2020 23:00 | 14d 9h | 49,535 | 574K |
| 2 | September 1, 2020 14:30 | September 21, 2020 03:45 | 19d 13h | 32,631 | 539K |
| 3 | February 10, 2020 02:45 | April 7, 2020 01:30 | 56d 22h | 30,875 | 280K |
| 4 | April 17, 2020 15:30 | May 11, 2020 11:15 | 23d 19h | 17,475 | 111K |
| 5 | July 27, 2020 13:00 | July 30, 2020 11:15 | 2d 22h | 16,699 | 34K |
| 6 | February 6, 2020 11:45 | February 10, 2020 02:00 | 3d 14h | 15,527 | 113K |
| 7 | January 9, 2020 14:45 | January 20, 2020 09:15 | 10d 18h | 13,450 | 271K |
| 8 | December 26, 2020 14:15 | December 31, 2020 00:15 | 4d 10h | 12,758 | 26K |
| 9 | June 16, 2020 12:45 | July 3, 2020 08:30 | 16d 19h | 10,326 | 138K |
| 10 | November 24, 2020 14:15 | December 3, 2020 11:30 | 8d 21h | 9,407 | 61K |
Outage episodes by size in 2020: 41 reached 100+ customers, 31 reached 1,000+ customers, 9 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 2020, 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 | 2020 | 6.9 hrs | 1.70 | 2.9 hrs | 1.06 |
| City of Tacoma - (WA) | 2020 | 85 min | 0.74 | 56 min | 0.57 |
| City of Seattle - (WA) | 2020 | 80 min | 0.55 | 67 min | 0.49 |
| 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 87% of Washington's customers in 2020; 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, 2020, 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/2020/washington/king-county