County annual report · FIPS 06007
2021 Butte County, CA Power Outage Report
In 2021, customers in Butte County, CA went without power for an average of 15.6 hours, a total of 1.4M customer-hours (California average 6.6 hours). That ranks 19th worst of 57 California counties and 550th 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 Butte 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 | July 22, 2021 07:30 | July 24, 2021 00:30 | 1d 17h | 14,476 | 106K |
| 2 | October 24, 2021 10:15 | October 27, 2021 10:15 | 3d | 12,007 | 142K |
| 3 | August 17, 2021 15:15 | August 20, 2021 05:15 | 2d 14h | 10,094 | 162K |
| 4 | January 26, 2021 16:15 | February 1, 2021 03:15 | 5d 11h | 7,405 | 136K |
| 5 | November 30, 2021 16:45 | December 2, 2021 02:00 | 1d 9h | 5,184 | 9,770 |
| 6 | December 13, 2021 12:30 | December 22, 2021 19:15 | 9d 6h | 5,131 | 308K |
| 7 | November 2, 2021 09:45 | November 3, 2021 10:45 | 1d 1h | 4,867 | 22K |
| 8 | July 25, 2021 10:15 | July 26, 2021 03:30 | 17h 15m | 4,613 | 8,889 |
| 9 | October 11, 2021 11:15 | October 13, 2021 03:30 | 1d 16h | 4,500 | 76K |
| 10 | February 9, 2021 16:15 | February 14, 2021 11:00 | 4d 18h | 3,552 | 4,193 |
Outage episodes by size in 2021: 149 reached 100+ customers, 50 reached 1,000+ customers, 3 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 Butte 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 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| City of Biggs - (CA) | - | - | - | - | - |
| City of Gridley - (CA) | - | - | - | - | - |
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 ÷ 90,543 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. Butte County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), Butte 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/butte-county