County annual report · FIPS 06085
2021 Santa Clara County, CA Power Outage Report
In 2021, customers in Santa Clara County, CA went without power for an average of 3.7 hours, a total of 3.1M customer-hours (California average 6.6 hours). That ranks 49th worst of 57 California counties and 1632nd 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 Santa Clara 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 18, 2021 10:45 | February 4, 2021 09:30 | 16d 22h | 39,108 | 641K |
| 2 | October 21, 2021 05:00 | November 7, 2021 07:00 | 17d 2h | 35,417 | 734K |
| 3 | April 23, 2021 16:00 | April 26, 2021 00:00 | 2d 8h | 13,443 | 17K |
| 4 | June 16, 2021 14:45 | June 25, 2021 13:00 | 8d 22h | 11,555 | 110K |
| 5 | March 9, 2021 16:30 | March 12, 2021 15:45 | 2d 23h | 7,534 | 20K |
| 6 | April 5, 2021 15:15 | April 12, 2021 11:00 | 6d 19h | 7,431 | 23K |
| 7 | March 21, 2021 18:30 | April 1, 2021 10:15 | 10d 15h | 6,702 | 51K |
| 8 | December 25, 2021 17:00 | December 31, 2021 00:15 | 5d 7h | 6,436 | 35K |
| 9 | August 27, 2021 14:00 | September 3, 2021 11:15 | 6d 21h | 6,293 | 95K |
| 10 | June 8, 2021 13:45 | June 14, 2021 13:00 | 5d 23h | 6,138 | 31K |
Outage episodes by size in 2021: 86 reached 100+ customers, 55 reached 1,000+ customers, 4 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 Santa Clara 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 of Palo Alto - (CA) | 2021 | 82 min | 0.54 | - | - |
| City of Santa Clara - (CA) | 2013 | 51 min | 0.52 | - | - |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
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 ÷ 844,715 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. Santa Clara County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Santa Clara 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/santa-clara-county