County annual report · FIPS 53053
2018 Pierce County, WA Power Outage Report
In 2018, customers in Pierce County, WA went without power for an average of 2.7 hours, a total of 520K customer-hours (Washington average 2.1 hours). That ranks 11th worst of 27 Washington counties and 1599th of 2,798 nationally.
Compared with WA, the US and 2017
Coverage line is EAGLE-I's share of Washington customers tracked each year.
Biggest outages in Pierce County, 2018
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | December 20, 2018 13:30 | December 21, 2018 22:45 | 1d 9h | 29,496 | 58K |
| 2 | September 17, 2018 14:00 | September 18, 2018 08:45 | 18h 45m | 16,795 | 82K |
| 3 | April 5, 2018 15:45 | April 9, 2018 14:15 | 3d 22h | 11,777 | 31K |
| 4 | November 24, 2018 22:15 | November 25, 2018 02:30 | 4h 15m | 10,210 | 2,609 |
| 5 | October 1, 2018 11:30 | October 1, 2018 19:15 | 7h 45m | 6,701 | 30K |
| 6 | February 17, 2018 18:30 | February 20, 2018 09:30 | 2d 15h | 6,340 | 34K |
| 7 | December 14, 2018 22:00 | December 15, 2018 02:30 | 4h 30m | 6,003 | 8,098 |
| 8 | October 30, 2018 14:45 | October 31, 2018 06:30 | 15h 45m | 5,895 | 3,637 |
| 9 | April 9, 2018 15:45 | April 9, 2018 23:15 | 7h 30m | 4,899 | 5,088 |
| 10 | December 27, 2018 04:30 | December 27, 2018 23:15 | 18h 45m | 4,124 | 6,053 |
Outage episodes by size in 2018: 125 reached 100+ customers, 49 reached 1,000+ customers, 4 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 2018, 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 | 2018 | 7.2 hrs | 1.52 | 2.4 hrs | 0.99 |
| PUD No 1 of Lewis County | 2018 | 4.9 hrs | 1.68 | 3.4 hrs | 1.48 |
| City of Tacoma - (WA) | 2018 | 86 min | 0.77 | 56 min | 0.49 |
| Peninsula Light Company | 2018 | 3.0 hrs | 1.86 | 32 min | 0.39 |
| 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 71% of Washington's customers in 2018; 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, 2018, 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/2018/washington/pierce-county