County annual report · FIPS 53053
2020 Pierce County, WA Power Outage Report
In 2020, customers in Pierce County, WA went without power for an average of 11.5 hours, a total of 2.2M customer-hours (Washington average 4.2 hours). That ranks 8th worst of 37 Washington counties and 695th of 3,019 nationally.
Compared with WA, the US and 2019
Coverage line is EAGLE-I's share of Washington customers tracked each year.
Biggest outages in Pierce County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | September 7, 2020 17:15 | September 12, 2020 04:00 | 4d 10h | 52,571 | 1.2M |
| 2 | October 11, 2020 13:45 | October 17, 2020 23:00 | 6d 9h | 26,469 | 190K |
| 3 | December 9, 2020 15:30 | December 18, 2020 01:30 | 8d 10h | 17,844 | 29K |
| 4 | February 8, 2020 02:30 | February 12, 2020 01:00 | 3d 22h | 15,134 | 98K |
| 5 | February 21, 2020 15:00 | February 26, 2020 16:30 | 5d 1h | 12,301 | 37K |
| 6 | September 23, 2020 15:30 | September 25, 2020 00:00 | 1d 8h | 10,914 | 15K |
| 7 | July 16, 2020 08:15 | July 22, 2020 19:45 | 6d 11h | 9,255 | 16K |
| 8 | January 10, 2020 18:15 | January 11, 2020 23:15 | 1d 5h | 7,446 | 36K |
| 9 | October 23, 2020 16:00 | November 4, 2020 22:30 | 12d 6h | 7,370 | 29K |
| 10 | January 31, 2020 17:00 | February 2, 2020 12:00 | 1d 19h | 5,353 | 43K |
Outage episodes by size in 2020: 127 reached 100+ customers, 63 reached 1,000+ customers, 6 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 2020, 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 | 2020 | 6.9 hrs | 1.70 | 2.9 hrs | 1.06 |
| PUD No 1 of Lewis County | 2020 | 7.2 hrs | 2.69 | 4.3 hrs | 1.91 |
| City of Tacoma - (WA) | 2020 | 85 min | 0.74 | 56 min | 0.57 |
| Peninsula Light Company | 2020 | 77 min | 0.51 | 77 min | 0.51 |
| 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 2020; 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, 2020, 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/2020/washington/pierce-county