massoutage

2018 Arizona Power Outage Report

In 2018, the average Arizona customer went without power for about 1.9 hours — the 40th worst of any US state that year, 1.3× the state's decade average. Figures from DOE/ORNL EAGLE-I.

Avg hrs / customer
1.9
Peak customers out
109,160
Rank (worst state)
40th
Counties affected
13

Arizona outages over the decade

Average hours without power per customer, 2018 highlighted.

0.4h20150.7h20161.1h20171.9h20181.3h20191.3h20201.9h20212.0h20222.1h20231.7h20241.6h2025

Hardest-hit Arizona counties in 2018

By peak customers out during the year's worst event.

1Maricopa County109,1602Pinal County16,3713Navajo County12,6574Pima County12,3325Mohave County5,7216Coconino County5,5187Yuma County5,4988Yavapai County4,5059Gila County4,03210Cochise County3,62311La Paz County2,35912Santa Cruz County2,12613Apache County1,172

Biggest Arizona outages of 2018

CountyBeganPeak customers out
Maricopa CountyJuly 9, 2018109,160
Maricopa CountyAugust 8, 201863,297
Maricopa CountyJuly 21, 201838,908
Maricopa CountyJuly 10, 201831,409
Maricopa CountyJune 15, 201818,201
Maricopa CountyAugust 20, 201817,427
Pinal CountyJuly 9, 201816,371
Maricopa CountyAugust 1, 201813,211
Navajo CountyAugust 9, 201812,657
Pima CountyJuly 27, 201812,332
Arizona by year:20252024202320222021202020192017
Other states in 2018:NCVAWVMARIVT

Part of the 2018 US Power Outage Report. Source: DOE/ORNL EAGLE-I. “Avg hours per customer” is a SAIDI-like measure (outage customer-minutes ÷ tracked customers); coverage varies by year.