County annual report · FIPS 53061
2021 Snohomish County, WA Power Outage Report
In 2021, customers in Snohomish County, WA went without power for an average of 4.7 hours, a total of 3.0M customer-hours (Washington average 8.7 hours). That ranks 19th worst of 33 Washington counties and 1381st of 2,974 nationally.
Compared with WA, the US and 2020
Coverage line is EAGLE-I's share of Washington customers tracked each year.
Biggest outages in Snohomish County, 2021
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 13, 2021 06:30 | January 18, 2021 04:00 | 4d 21h | 84,976 | 1.7M |
| 2 | October 24, 2021 10:15 | October 27, 2021 18:45 | 3d 8h | 32,199 | 232K |
| 3 | November 14, 2021 01:45 | November 18, 2021 12:45 | 4d 11h | 24,583 | 284K |
| 4 | March 28, 2021 17:00 | March 29, 2021 22:15 | 1d 5h | 12,928 | 36K |
| 5 | May 16, 2021 22:00 | May 17, 2021 03:00 | 5h | 10,142 | 13K |
| 6 | December 11, 2021 03:30 | December 12, 2021 00:45 | 21h 15m | 9,427 | 34K |
| 7 | February 13, 2021 02:30 | February 16, 2021 12:30 | 3d 10h | 8,704 | 162K |
| 8 | November 9, 2021 01:30 | November 10, 2021 13:15 | 1d 11h | 8,214 | 43K |
| 9 | February 21, 2021 17:15 | February 23, 2021 10:15 | 1d 17h | 5,216 | 23K |
| 10 | April 19, 2021 16:30 | April 20, 2021 01:15 | 8h 45m | 4,941 | 11K |
Outage episodes by size in 2021: 199 reached 100+ customers, 86 reached 1,000+ customers, 5 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 Snohomish County reported on EIA Form 861 for 2021, 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 |
|---|---|---|---|---|---|
| PUD No 1 of Snohomish County | 2021 | 10.7 hrs | 2.24 | 2.3 hrs | 1.29 |
| Bonneville Power Administration | - | - | - | - | - |
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 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 638,029 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. Snohomish County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Snohomish County, WA annual power outage report, 2021, 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/2021/washington/snohomish-county