County annual report · FIPS 06091
2019 Sierra County, CA Power Outage Report
In 2019, customers in Sierra County, CA went without power for an average of 256.5 hours, a total of 532K customer-hours (California average 9.6 hours). That ranks 1st worst of 57 California counties and 9th of 2,945 nationally.
Compared with CA, the US and 2018
Coverage line is EAGLE-I's share of California customers tracked each year.
Biggest outages in Sierra County, 2019
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | November 27, 2019 05:00 | November 29, 2019 04:15 | 1d 23h | 1,681 | 42K |
| 2 | November 7, 2019 00:45 | November 7, 2019 12:15 | 11h 30m | 1,680 | 9,376 |
| 3 | October 9, 2019 09:45 | October 9, 2019 12:30 | 2h 45m | 1,679 | 3,811 |
| 4 | October 23, 2019 22:45 | October 25, 2019 21:45 | 1d 23h | 1,679 | 44K |
| 5 | October 27, 2019 01:45 | October 27, 2019 05:45 | 4h | 1,679 | 5,450 |
| 6 | May 18, 2019 02:00 | May 21, 2019 02:15 | 3d | 1,678 | 20K |
| 7 | September 4, 2019 16:45 | September 4, 2019 22:00 | 5h 15m | 1,678 | 5,668 |
| 8 | September 5, 2019 01:45 | September 5, 2019 04:30 | 2h 45m | 1,678 | 2,693 |
| 9 | October 9, 2019 14:15 | October 9, 2019 19:00 | 4h 45m | 1,507 | 6,782 |
| 10 | October 9, 2019 21:30 | October 10, 2019 01:15 | 3h 45m | 1,507 | 4,898 |
Outage episodes by size in 2019: 42 reached 100+ customers, 19 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 2019, 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. | 2018 | 5.0 hrs | 1.18 | 2.1 hrs | 1.08 |
| Liberty Utilities | 2018 | 4.8 hrs | 2.19 | 4.8 hrs | 2.19 |
| 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 93% of California's customers in 2019; 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, 2019, 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/2019/california/sierra-county