County annual report · FIPS 06079
2021 San Luis Obispo County, CA Power Outage Report
In 2021, customers in San Luis Obispo County, CA went without power for an average of 8.4 hours, a total of 1.1M customer-hours (California average 6.6 hours). That ranks 29th worst of 57 California counties and 902nd 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 Luis Obispo 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 27, 2021 08:45 | February 1, 2021 00:45 | 4d 16h | 12,574 | 164K |
| 2 | October 24, 2021 19:30 | October 27, 2021 06:45 | 2d 11h | 10,948 | 95K |
| 3 | August 18, 2021 13:30 | August 21, 2021 05:00 | 2d 15h | 6,953 | 37K |
| 4 | November 5, 2021 14:45 | November 6, 2021 01:30 | 10h 45m | 5,511 | 9,420 |
| 5 | May 20, 2021 15:45 | May 21, 2021 08:30 | 16h 45m | 5,507 | 5,930 |
| 6 | October 11, 2021 13:45 | October 13, 2021 02:45 | 1d 13h | 5,382 | 36K |
| 7 | December 26, 2021 01:30 | December 29, 2021 20:00 | 3d 18h | 5,149 | 32K |
| 8 | December 13, 2021 15:15 | December 18, 2021 23:45 | 5d 8h | 4,794 | 48K |
| 9 | September 17, 2021 13:45 | September 19, 2021 02:30 | 1d 12h | 4,223 | 50K |
| 10 | January 15, 2021 05:45 | January 15, 2021 07:15 | 1h 30m | 3,562 | 2,191 |
Outage episodes by size in 2021: 172 reached 100+ customers, 55 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 Luis Obispo 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 |
| Central Coast Community Energy | - | - | - | - | - |
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 ÷ 125,727 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 Luis Obispo County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), San Luis Obispo 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-luis-obispo-county