County annual report · FIPS 06081
2019 San Mateo County, CA Power Outage Report
In 2019, customers in San Mateo County, CA went without power for an average of 10.9 hours, a total of 3.6M customer-hours (California average 9.6 hours). That ranks 27th worst of 57 California counties and 493rd of 2,945 nationally.
Compared with CA, the US and 2018
Coverage line is EAGLE-I's share of California customers tracked each year.
Biggest outages in San Mateo County, 2019
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | October 27, 2019 06:30 | October 29, 2019 08:00 | 2d 1h | 56,555 | 2.1M |
| 2 | October 24, 2019 08:15 | October 27, 2019 05:45 | 2d 21h | 54,280 | 107K |
| 3 | January 16, 2019 13:15 | January 17, 2019 06:45 | 17h 30m | 25,619 | 92K |
| 4 | February 10, 2019 22:30 | February 14, 2019 15:15 | 3d 16h | 19,000 | 75K |
| 5 | October 10, 2019 20:15 | October 13, 2019 01:15 | 2d 5h | 14,986 | 110K |
| 6 | October 10, 2019 19:15 | October 10, 2019 19:30 | 15m | 14,985 | 3,746 |
| 7 | October 10, 2019 06:00 | October 10, 2019 16:00 | 10h | 14,976 | 132K |
| 8 | February 25, 2019 15:45 | February 28, 2019 11:15 | 2d 19h | 10,271 | 82K |
| 9 | October 21, 2019 14:30 | October 22, 2019 06:15 | 15h 45m | 9,994 | 2,962 |
| 10 | March 11, 2019 14:15 | March 15, 2019 12:15 | 3d 22h | 8,413 | 35K |
Outage episodes by size in 2019: 175 reached 100+ customers, 67 reached 1,000+ customers, 8 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 2019, 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. | 2018 | 5.0 hrs | 1.18 | 2.1 hrs | 1.08 |
| 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 93% of California's customers in 2019; 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, 2019, 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/2019/california/san-mateo-county