County annual report · FIPS 53045
2021 Mason County, WA Power Outage Report
In 2021, customers in Mason County, WA went without power for an average of 9.9 hours, a total of 372K customer-hours (Washington average 8.7 hours). That ranks 13th worst of 33 Washington counties and 786th 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 Mason 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 04:15 | January 14, 2021 23:30 | 1d 19h | 23,192 | 139K |
| 2 | June 5, 2021 11:45 | June 6, 2021 09:15 | 21h 30m | 4,171 | 56K |
| 3 | September 16, 2021 17:15 | September 18, 2021 03:30 | 1d 10h | 4,170 | 22K |
| 4 | January 27, 2021 04:00 | January 28, 2021 15:30 | 1d 11h | 4,144 | 18K |
| 5 | October 23, 2021 02:00 | October 26, 2021 04:30 | 3d 2h | 3,548 | 15K |
| 6 | December 10, 2021 00:00 | December 13, 2021 20:00 | 3d 20h | 2,397 | 17K |
| 7 | September 7, 2021 18:30 | September 9, 2021 21:15 | 2d 2h | 2,241 | 10K |
| 8 | November 15, 2021 16:15 | November 16, 2021 10:45 | 18h 30m | 2,144 | 5,847 |
| 9 | September 2, 2021 16:45 | September 2, 2021 19:15 | 2h 30m | 1,716 | 1,041 |
| 10 | June 7, 2021 21:30 | June 7, 2021 22:00 | 30m | 1,690 | 423 |
Outage episodes by size in 2021: 69 reached 100+ customers, 21 reached 1,000+ customers, 1 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 Mason 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 |
|---|---|---|---|---|---|
| City of Tacoma - (WA) | 2021 | 5.2 hrs | 1.31 | 1.5 hrs | 0.70 |
| PUD No 3 of Mason County | - | - | - | - | - |
| PUD No 1 of Mason County | - | - | - | - | - |
| PUD No 3 of Mason County,masonpud3 | - | - | - | - | - |
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 ÷ 37,529 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. Mason County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Mason 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/mason-county