County annual report · FIPS 06091
2024 Sierra County, CA Power Outage Report
In 2024, customers in Sierra County, CA went without power for an average of 97.6 hours, a total of 202K customer-hours (California average 6.1 hours). That ranks 1st worst of 57 California counties and 97th of 2,990 nationally.
Compared with CA, the US and 2023
Coverage line is EAGLE-I's share of California customers tracked each year.
Biggest outages in Sierra County, 2024
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | March 2, 2024 01:45 | March 8, 2024 02:45 | 6d 1h | 2,454 | 75K |
| 2 | November 23, 2024 03:00 | November 24, 2024 18:30 | 1d 15h | 1,682 | 36K |
| 3 | March 14, 2024 11:45 | March 16, 2024 02:45 | 1d 15h | 1,077 | 4,862 |
| 4 | April 25, 2024 23:45 | April 26, 2024 00:15 | 30m | 1,077 | 539 |
| 5 | August 6, 2024 17:15 | August 6, 2024 20:30 | 3h 15m | 1,075 | 3,494 |
| 6 | May 9, 2024 10:30 | May 9, 2024 13:30 | 3h | 910 | 2,386 |
| 7 | August 12, 2024 03:30 | August 13, 2024 22:30 | 1d 19h | 825 | 8,705 |
| 8 | March 27, 2024 19:45 | March 31, 2024 00:30 | 3d 4h | 798 | 5,709 |
| 9 | September 2, 2024 23:45 | September 5, 2024 03:15 | 2d 3h | 752 | 22K |
| 10 | June 5, 2024 23:30 | June 6, 2024 07:30 | 8h | 707 | 4,002 |
Outage episodes by size in 2024: 34 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 2024, 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. | 2024 | 8.5 hrs | 2.15 | 4.6 hrs | 1.82 |
| Liberty Utilities | 2024 | 12.4 hrs | 2.57 | 8.3 hrs | 2.37 |
| 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 2024; 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, 2024, 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/2024/california/sierra-county