Santa Clara County, California Power Outages, 2015 to 2023

Santa Clara County, California had 14 major outages from 2015 to 2023

Below middle outage time among US counties

Residents here averaged 0.48 times the US outage time per person and 0.54 times the California rate. It ranks 41 of 55 in the state, where 1 has the most. Data confidence: High, with 9 years of records.

1.6major outages per year

5 of 9years with a major outage

117 hrslongest major outage

Mar, Janhardest months

March and January made up 37% of this county's outage time. The largest outage on record began Mar 14, 2023, reached 138,982 customers, and left at least 200 customers out for 52.5 hours.

Outage time per resident, rated California counties

MostLeast

Outage impact by year

Customer-hours without power. 1,000 customers out for 2 hours is 2,000 customer-hours.

2.5M

7.5M

10M

2015'152016'162017'172018'182019'192020'202021'212022'222023'23

Show yearly numbers

Year	Customer-hours	Reported outages	Major outages
2015	7,192	8	0
2016	39,957	9	0
2017	468	1	0
2018	684,231	392	0
2019	2,842,530	660	1
2020	2,807,864	775	2
2021	2,752,638	595	2
2022	2,658,239	680	2
2023	8,660,398	673	7

When outages hit

Share of this county's customer-hours by month.

10%

20%

30%

40%

JanJFebFMarMAprAMayMJunJJulJAugASepSOctONovNDecD

Largest outages on record

Start date	Hours	Peak customers	Customer-hours
Mar 14, 2023	52.5	138,982	3,477,018
Aug 16, 2020	105.2	34,460	1,003,365
Sep 4, 2022	117.0	50,309	773,079
Feb 21, 2023	47.5	41,409	614,192
Jan 11, 2023	46.0	25,456	555,576

Hours measure how long at least 200 customers in the county were out. Most customers get power back sooner.

Size your backup battery

Start with what you would keep running. Wattages are typical averages, so check your own appliances.

Phones, Wi-Fi, lights, about 60 WRefrigerator, about 60 WChest freezer, about 40 WGas furnace fan, about 160 W

Hours to cover: 24

1,700 Whof battery capacity, allowing for about 15% conversion loss

If anyone relies on medical equipment, plan that with their provider. Run portable fuel generators outdoors only, at least 20 feet from doors, windows and vents. See the outage checklist.

Look up another county

Counties ranked nearby

How to read this

A major outage lasted at least 8 hours and reached customers equal to at least 1% of county residents.
Records cover outages of at least 200 customers in a county. They do not show what happened on your street.
Utilities that do not report can make a county look better than it is. Data ends in 2023. Read the full method.