County annual report · FIPS 06003
2021 Alpine County, CA Power Outage Report
In 2021, customers in Alpine County, CA went without power for an average of 182.4 hours, a total of 161K customer-hours (California average 6.6 hours). That ranks 2nd worst of 57 California counties and 32nd of 2,974 nationally.
Compared with CA, the US and 2020
Coverage line is EAGLE-I's share of California customers tracked each year.
Biggest outages in Alpine County, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | January 19, 2021 09:30 | January 24, 2021 00:00 | 4d 14h | 1,102 | 61K |
| 2 | July 17, 2021 02:30 | August 20, 2021 20:30 | 34d 18h | 611 | 90K |
| 3 | July 3, 2021 23:30 | July 4, 2021 02:45 | 3h 15m | 607 | 1,972 |
| 4 | June 28, 2021 00:30 | June 28, 2021 05:00 | 4h 30m | 606 | 2,121 |
| 5 | October 25, 2021 16:15 | October 25, 2021 16:30 | 15m | 439 | 110 |
| 6 | October 25, 2021 13:45 | October 25, 2021 14:15 | 30m | 430 | 215 |
| 7 | June 16, 2021 16:45 | June 16, 2021 18:15 | 1h 30m | 280 | 350 |
| 8 | September 27, 2021 23:00 | September 28, 2021 06:45 | 7h 45m | 280 | 393 |
| 9 | January 24, 2021 02:30 | January 27, 2021 00:15 | 2d 21h | 144 | 1,882 |
| 10 | December 24, 2021 14:15 | December 24, 2021 22:15 | 8h | 66 | 528 |
Outage episodes by size in 2021: 9 reached 100+ customers, 1 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 Alpine County reported on EIA Form 861 for 2021, 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. | 2021 | 10.4 hrs | 1.84 | 3.6 hrs | 1.32 |
| Liberty Utilities | 2021 | 16.8 hrs | 4.60 | 11.7 hrs | 3.86 |
| Kirkwood Meadows PUD | - | - | - | - | - |
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 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 882 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. Alpine County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Alpine County, CA annual power outage report, 2021, 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/2021/california/alpine-county