County annual report · FIPS 06081
2024 San Mateo County, CA Power Outage Report
In 2024, customers in San Mateo County, CA went without power for an average of 12.5 hours, a total of 4.1M customer-hours (California average 6.1 hours). That ranks 26th worst of 57 California counties and 762nd of 2,990 nationally.
Compared with CA, the US and 2023
Coverage line is EAGLE-I's share of California customers tracked each year.
Biggest outages in San Mateo County, 2024
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 31, 2024 16:00 | February 14, 2024 14:15 | 13d 22h | 81,483 | 2.1M |
| 2 | December 12, 2024 07:15 | December 18, 2024 12:45 | 6d 5h | 32,063 | 323K |
| 3 | October 4, 2024 14:15 | October 6, 2024 21:00 | 2d 6h | 20,682 | 34K |
| 4 | October 8, 2024 15:00 | October 14, 2024 03:15 | 5d 12h | 12,151 | 139K |
| 5 | January 21, 2024 13:15 | January 24, 2024 01:45 | 2d 12h | 11,038 | 28K |
| 6 | May 28, 2024 15:15 | May 30, 2024 03:15 | 1d 12h | 9,780 | 24K |
| 7 | February 28, 2024 15:45 | March 5, 2024 08:30 | 5d 16h | 9,441 | 44K |
| 8 | September 11, 2024 12:30 | September 14, 2024 11:45 | 2d 23h | 8,760 | 38K |
| 9 | April 2, 2024 13:00 | April 4, 2024 06:30 | 1d 17h | 8,377 | 28K |
| 10 | January 7, 2024 14:15 | January 9, 2024 08:15 | 1d 18h | 8,144 | 22K |
Outage episodes by size in 2024: 163 reached 100+ customers, 83 reached 1,000+ customers, 5 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 Mateo County reported on EIA Form 861 for 2024, 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. | 2024 | 8.5 hrs | 2.15 | 4.6 hrs | 1.82 |
| 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 n/a of California's customers in 2024; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 328,408 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 Mateo County has data for 2017–2025.
Cite this report
MassOutage (massoutage.com), San Mateo County, CA annual power outage report, 2024, 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/2024/california/san-mateo-county