County annual report · FIPS 53033
2016 King County, WA Power Outage Report
In 2016, customers in King County, WA went without power for an average of 3.8 hours, a total of 3.6M customer-hours (Washington average 3.2 hours). That ranks 8th worst of 21 Washington counties and 832nd of 2,391 nationally.
Compared with WA, the US and 2015
Coverage line is EAGLE-I's share of Washington customers tracked each year.
Biggest outages in King County, 2016
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | March 13, 2016 07:00 | March 20, 2016 06:15 | 6d 23h | 129,685 | 1.3M |
| 2 | May 11, 2016 06:45 | May 11, 2016 12:30 | 5h 45m | 38,834 | 75K |
| 3 | October 8, 2016 22:30 | November 1, 2016 04:45 | 23d 6h | 25,577 | 326K |
| 4 | December 8, 2016 02:45 | December 31, 2016 00:15 | 22d 21h | 20,224 | 195K |
| 5 | September 8, 2016 04:15 | September 11, 2016 07:15 | 3d 3h | 18,079 | 113K |
| 6 | March 9, 2016 15:30 | March 12, 2016 02:00 | 2d 10h | 15,050 | 55K |
| 7 | February 29, 2016 16:15 | March 7, 2016 07:00 | 6d 14h | 12,146 | 70K |
| 8 | November 14, 2016 16:45 | November 21, 2016 12:45 | 6d 20h | 11,865 | 32K |
| 9 | July 11, 2016 12:00 | August 2, 2016 16:15 | 22d 4h | 10,014 | 146K |
| 10 | February 11, 2016 08:30 | February 20, 2016 14:45 | 9d 6h | 7,654 | 75K |
Outage episodes by size in 2016: 99 reached 100+ customers, 55 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 2016, 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 | 2016 | 6.5 hrs | 1.63 | 2.6 hrs | 1.02 |
| City of Seattle - (WA) | 2016 | 2.5 hrs | 0.87 | 61 min | 0.50 |
| 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 2016; 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, 2016, 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/2016/washington/king-county