County annual report · FIPS 06075
2021 San Francisco County, CA Power Outage Report
In 2021, customers in San Francisco County, CA went without power for an average of 5.1 hours, a total of 1.1M customer-hours (California average 6.6 hours). That ranks 41st worst of 57 California counties and 1310th 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 San Francisco 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 29, 2021 16:30 | January 30, 2021 20:00 | 1d 3h | 11,384 | 9,231 |
| 2 | November 1, 2021 15:00 | November 3, 2021 20:30 | 2d 5h | 10,606 | 108K |
| 3 | October 24, 2021 13:15 | October 25, 2021 17:00 | 1d 3h | 8,920 | 104K |
| 4 | September 17, 2021 14:15 | September 18, 2021 14:00 | 23h 45m | 8,769 | 17K |
| 5 | December 21, 2021 00:45 | December 24, 2021 08:45 | 3d 8h | 8,213 | 24K |
| 6 | January 27, 2021 19:30 | January 29, 2021 07:15 | 1d 11h | 7,495 | 27K |
| 7 | April 22, 2021 14:45 | April 23, 2021 09:30 | 18h 45m | 7,028 | 7,285 |
| 8 | October 22, 2021 00:15 | October 22, 2021 06:30 | 6h 15m | 6,918 | 6,310 |
| 9 | February 5, 2021 06:15 | February 6, 2021 16:00 | 1d 9h | 6,638 | 16K |
| 10 | March 5, 2021 19:00 | March 6, 2021 04:30 | 9h 30m | 6,475 | 4,406 |
Outage episodes by size in 2021: 335 reached 100+ customers, 71 reached 1,000+ customers, 2 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 San Francisco 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 |
| City & County of San Francisco | - | - | - | - | - |
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 ÷ 209,753 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. San Francisco County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), San Francisco 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/san-francisco-county