County annual report · FIPS 06091
2022 Sierra County, CA Power Outage Report
In 2022, customers in Sierra County, CA went without power for an average of 102.4 hours, a total of 212K customer-hours (California average 4.9 hours). That ranks 1st worst of 57 California counties and 23rd of 2,976 nationally.
Compared with CA, the US and 2021
Coverage line is EAGLE-I's share of California customers tracked each year.
Biggest outages in Sierra County, 2022
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | June 29, 2022 00:00 | June 30, 2022 04:30 | 1d 4h | 1,676 | 34K |
| 2 | June 23, 2022 00:15 | June 23, 2022 04:30 | 4h 15m | 1,512 | 4,026 |
| 3 | June 18, 2022 16:00 | June 19, 2022 04:45 | 12h 45m | 1,076 | 6,480 |
| 4 | November 9, 2022 04:00 | November 15, 2022 01:00 | 5d 21h | 1,009 | 22K |
| 5 | July 2, 2022 01:30 | July 2, 2022 05:45 | 4h 15m | 956 | 2,195 |
| 6 | August 26, 2022 15:15 | August 27, 2022 00:00 | 8h 45m | 913 | 6,970 |
| 7 | December 10, 2022 17:45 | December 13, 2022 01:00 | 2d 7h | 913 | 3,322 |
| 8 | December 31, 2022 14:00 | December 31, 2022 18:45 | 4h 45m | 909 | 4,318 |
| 9 | May 5, 2022 04:15 | May 5, 2022 07:30 | 3h 15m | 751 | 519 |
| 10 | January 1, 2022 00:00 | January 14, 2022 01:30 | 13d 1h | 699 | 78K |
Outage episodes by size in 2022: 33 reached 100+ customers, 4 reached 1,000+ customers, 0 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 Sierra County reported on EIA Form 861 for 2022, 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 |
|---|---|---|---|---|---|
| Pacific Gas & Electric Co. | 2022 | 5.4 hrs | 1.78 | 4.3 hrs | 1.63 |
| Liberty Utilities | 2022 | 25.5 hrs | 5.19 | 7.9 hrs | 3.55 |
| Plumas-Sierra Rural Elec Coop | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 95% of California's customers in 2022; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 2,072 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. Sierra County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Sierra County, CA annual power outage report, 2022, 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/2022/california/sierra-county