County annual report · FIPS 53033
2017 King County, WA Power Outage Report
In 2017, customers in King County, WA went without power for an average of 5.0 hours, a total of 4.8M customer-hours (Washington average 3.3 hours). That ranks 8th worst of 31 Washington counties and 958th of 2,786 nationally.
Compared with WA, the US and 2016
Coverage line is EAGLE-I's share of Washington customers tracked each year.
Biggest outages in King County, 2017
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | November 13, 2017 08:15 | November 17, 2017 13:00 | 4d 4h | 132,417 | 1.3M |
| 2 | February 6, 2017 03:15 | February 21, 2017 15:45 | 15d 12h | 76,835 | 1.5M |
| 3 | October 12, 2017 13:15 | October 21, 2017 19:30 | 9d 6h | 33,559 | 178K |
| 4 | January 8, 2017 13:30 | January 13, 2017 14:45 | 5d 1h | 27,815 | 95K |
| 5 | December 27, 2017 15:15 | December 31, 2017 00:15 | 3d 9h | 25,742 | 132K |
| 6 | January 13, 2017 16:15 | January 31, 2017 06:30 | 17d 14h | 22,091 | 59K |
| 7 | April 7, 2017 11:45 | April 16, 2017 11:15 | 8d 23h | 20,028 | 91K |
| 8 | July 22, 2017 07:15 | August 14, 2017 14:00 | 23d 6h | 11,608 | 97K |
| 9 | November 20, 2017 13:30 | November 28, 2017 09:45 | 7d 20h | 9,384 | 38K |
| 10 | November 5, 2017 05:00 | November 11, 2017 01:30 | 5d 20h | 8,096 | 104K |
Outage episodes by size in 2017: 46 reached 100+ customers, 36 reached 1,000+ customers, 8 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 2017, 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 | 2017 | 8.0 hrs | 1.80 | 2.9 hrs | 1.12 |
| City of Seattle - (WA) | 2017 | 2.8 hrs | 0.79 | 65 min | 0.45 |
| Bonneville Power Administration | - | - | - | - | - |
| Puget Sound Energy Inc,pugetsoundenergy | - | - | - | - | - |
| City of Tacoma - (WA) | - | - | - | - | - |
| 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 2017; 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, 2017, 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/2017/washington/king-county