County annual report · FIPS 06091
2023 Sierra County, CA Power Outage Report
In 2023, customers in Sierra County, CA went without power for an average of 223.2 hours, a total of 462K customer-hours (California average 7.9 hours). That ranks 1st worst of 57 California counties and 9th of 2,977 nationally.
Compared with CA, the US and 2022
Coverage line is EAGLE-I's share of California customers tracked each year.
Biggest outages in Sierra County, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | February 27, 2023 00:15 | March 12, 2023 01:30 | 13d 1h | 4,203 | 374K |
| 2 | July 28, 2023 17:30 | July 28, 2023 23:15 | 5h 45m | 1,165 | 1,451 |
| 3 | January 15, 2023 00:30 | January 19, 2023 01:15 | 4d | 1,080 | 16K |
| 4 | October 24, 2023 12:45 | October 24, 2023 13:15 | 30m | 1,077 | 539 |
| 5 | October 29, 2023 03:15 | October 29, 2023 04:30 | 1h 15m | 1,077 | 816 |
| 6 | February 24, 2023 23:15 | February 24, 2023 23:45 | 30m | 992 | 496 |
| 7 | January 1, 2023 07:15 | January 3, 2023 01:00 | 1d 17h | 909 | 12K |
| 8 | January 23, 2023 21:30 | January 24, 2023 00:00 | 2h 30m | 909 | 2,048 |
| 9 | May 3, 2023 11:15 | May 3, 2023 13:15 | 2h | 748 | 1,496 |
| 10 | August 28, 2023 10:30 | August 28, 2023 11:30 | 1h | 748 | 561 |
Outage episodes by size in 2023: 32 reached 100+ customers, 5 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 2023, 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. | 2023 | 11.9 hrs | 2.22 | 4.3 hrs | 1.56 |
| Liberty Utilities | 2023 | 4.4 hrs | 1.97 | 4.4 hrs | 1.97 |
| 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 n/a of California's customers in 2023; 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, 2023, 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/2023/california/sierra-county