Napa County, California Power Outages, 2018 to 2023

Napa County, California had 63 major outages from 2018 to 2023

Higher outage time among US counties

Residents here averaged 4.33 times the US outage time per person and 4.83 times the California rate. It ranks 15 of 55 in the state, where 1 has the most. Data confidence: Medium, with 6 years of records.

10.5major outages per year

6 of 6years with a major outage

221 hrslongest major outage

Oct, Aughardest months

October and August made up 69% of this county's outage time. The largest outage on record began Oct 3, 2020, reached 4,853 customers, and left at least 200 customers out for 149.8 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	279,170	68	4
2019	3,138,437	175	10
2020	3,416,976	183	23
2021	569,554	147	9
2022	414,990	195	7
2023	611,718	175	10

When outages hit

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

20%

40%

60%

80%

JanJFebFMarMAprAMayMJunJJulJAugASepSOctONovNDecD

Largest outages on record

Start date	Hours	Peak customers	Customer-hours
Oct 3, 2020	149.8	4,853	454,999
Aug 21, 2020	221.2	4,583	391,840
Sep 29, 2020	54.8	10,068	333,798
Oct 10, 2019	6.2	45,759	284,036
Oct 10, 2019	11.8	46,278	270,197

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.