County annual report · FIPS 53053
2021 Pierce County, WA Power Outage Report
In 2021, customers in Pierce County, WA went without power for an average of 18.3 hours, a total of 3.5M customer-hours (Washington average 8.7 hours). That ranks 5th worst of 33 Washington counties and 470th 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 Pierce 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 7, 2021 16:15 | January 19, 2021 17:00 | 12d | 107,403 | 1.5M |
| 2 | September 17, 2021 15:30 | September 22, 2021 13:30 | 4d 22h | 55,715 | 428K |
| 3 | October 24, 2021 14:00 | October 27, 2021 23:45 | 3d 9h | 34,842 | 321K |
| 4 | November 8, 2021 17:00 | November 10, 2021 06:15 | 1d 13h | 31,159 | 65K |
| 5 | November 14, 2021 17:00 | November 18, 2021 11:30 | 3d 18h | 20,287 | 166K |
| 6 | November 1, 2021 23:45 | November 3, 2021 12:30 | 1d 12h | 17,731 | 109K |
| 7 | September 12, 2021 18:15 | September 13, 2021 11:15 | 17h | 12,433 | 42K |
| 8 | October 21, 2021 16:15 | October 24, 2021 04:00 | 2d 11h | 9,296 | 47K |
| 9 | June 22, 2021 13:00 | July 1, 2021 11:45 | 8d 22h | 7,548 | 140K |
| 10 | December 25, 2021 02:00 | December 31, 2021 00:15 | 5d 22h | 6,766 | 50K |
Outage episodes by size in 2021: 130 reached 100+ customers, 57 reached 1,000+ customers, 7 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 Pierce 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 |
|---|---|---|---|---|---|
| Puget Sound Energy Inc | 2021 | 14.2 hrs | 2.27 | 3.5 hrs | 1.26 |
| PUD No 1 of Lewis County | 2021 | 14.9 hrs | 4.20 | 5.8 hrs | 2.37 |
| City of Tacoma - (WA) | 2021 | 5.2 hrs | 1.31 | 1.5 hrs | 0.70 |
| Peninsula Light Company | 2021 | 52 min | 0.33 | 52 min | 0.33 |
| Bonneville Power Administration | - | - | - | - | - |
| Puget Sound Energy Inc,pugetsoundenergy | - | - | - | - | - |
| PUD No 3 of Mason County | - | - | - | - | - |
| Tanner Electric Coop | - | - | - | - | - |
| City of Milton - (WA) | - | - | - | - | - |
| Elmhurst Mutual Power & Light Co | - | - | - | - | - |
| Lakeview Light & Power | - | - | - | - | - |
| Ohop Mutual Light Company, Inc | - | - | - | - | - |
| Parkland Light & Water Company | - | - | - | - | - |
| Town of Eatonville - (WA) | - | - | - | - | - |
| Town of Ruston - (WA) | - | - | - | - | - |
| Town of Steilacoom | - | - | - | - | - |
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 ÷ 190,282 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. Pierce County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Pierce 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/pierce-county