Maricopa County, Arizona Power Outages, 2015 to 2023

Maricopa County, Arizona had 8 major outages from 2015 to 2023

Lower outage time among US counties

Residents here averaged 0.18 times the US outage time per person and 0.81 times the Arizona rate. It ranks 11 of 13 in the state, where 1 has the most. Data confidence: High, with 9 years of records.

0.9major outages per year

5 of 9years with a major outage

73 hrslongest major outage

Jul, Aughardest months

July and August made up 39% of this county's outage time. The largest outage on record began Oct 3, 2022, reached 91,239 customers, and left at least 200 customers out for 22.2 hours.

Outage time per resident, rated Arizona counties

MostLeast

Outage impact by year

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

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

Show yearly numbers

Year	Customer-hours	Reported outages	Major outages
2015	708,037	207	0
2016	837,891	538	0
2017	1,659,949	781	0
2018	3,359,317	860	2
2019	1,391,342	677	0
2020	1,925,050	988	1
2021	2,851,373	965	2
2022	3,041,288	937	2
2023	2,464,758	940	1

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
Oct 3, 2022	22.2	91,239	454,307
Jul 16, 2022	73.2	48,316	427,760
Aug 17, 2021	25.0	72,380	356,873
Jul 9, 2018	10.0	109,160	319,534
Sep 1, 2023	23.2	83,324	315,209

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.