Pima County, Arizona Power Outages, 2015 to 2023

Pima County, Arizona had 13 major outages from 2015 to 2023

Lower outage time among US counties

Residents here averaged 0.20 times the US outage time per person and 0.92 times the Arizona rate. It ranks 9 of 13 in the state, where 1 has the most. Data confidence: High, with 9 years of records.

1.4major outages per year

6 of 9years with a major outage

50 hrslongest major outage

Jul, Aughardest months

July and August made up 53% of this county's outage time. The largest outage on record began Jul 29, 2023, reached 54,076 customers, and left at least 200 customers out for 50.5 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.

0.5M

1.5M

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

Show yearly numbers

Year	Customer-hours	Reported outages	Major outages
2015	110,034	65	0
2016	622,580	151	2
2017	216,002	53	1
2018	270,132	168	0
2019	239,271	106	0
2020	324,616	125	2
2021	845,684	209	3
2022	544,928	219	1
2023	1,627,196	221	4

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
Jul 29, 2023	50.5	54,076	599,558
Feb 1, 2016	5.5	55,764	186,136
Jul 17, 2023	37.2	20,224	177,514
Jul 24, 2023	36.0	13,034	125,932
Jul 23, 2021	27.8	14,068	114,800

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.