Tuolumne County, California Power Outages, 2018 to 2023

Tuolumne County, California had 58 major outages from 2018 to 2023

Higher outage time among US counties

Residents here averaged 12.86 times the US outage time per person and 14.33 times the California rate. It ranks 3 of 55 in the state, where 1 has the most. Data confidence: Medium, with 6 years of records.

9.7major outages per year

5 of 6years with a major outage

149 hrslongest major outage

Oct, Sephardest months

October and September made up 46% of this county's outage time. The largest outage on record began Sep 9, 2023, reached 37,050 customers, and left at least 200 customers out for 51.8 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.

2018'182019'192020'202021'212022'222023'23

Show yearly numbers

Year	Customer-hours	Reported outages	Major outages
2018	43,520	30	0
2019	2,985,157	115	10
2020	1,971,650	90	10
2021	2,746,132	96	15
2022	458,994	96	7
2023	1,959,881	134	16

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
Sep 9, 2023	51.8	37,050	607,060
Feb 27, 2023	142.5	10,969	534,682
Feb 5, 2019	44.8	27,411	431,300
Jan 29, 2021	149.2	6,211	429,354
Dec 27, 2021	85.5	8,497	428,806

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.

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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.