Power Out Map
– 0 customers out in Arizona

Power outage history

Arizona

1.6hours

without power for the average customer in a typical year, 2018–2025. 51st of 51.

Largest outage on record Thunderstorms, July 10, 2018 89,822 customers out · 3% of the state
Electricity customers 3,244,973 Across 15 counties
Worst well-recorded year 2023 2.0 hours without power, average customer

County by county

Where Arizona goes dark

Hours without power for the average customer in a typical year. Hover a county; click to open it.

Fewer hours64+ h / yr

Most hours without power

  1. 1La Paz10 h
  2. 2Gila5.3 h
  3. 3Greenlee4.7 h
  4. 4Navajo3.2 h
  5. 5Yavapai3.0 h
  6. 6Apache1.8 h
  7. 7Coconino1.8 h
  8. 8Pinal1.8 h
  9. 9Maricopa1.5 h
  10. 10Yuma1.5 h

Most reliable

  1. 1Cochise0.6 h
  2. 2Mohave0.8 h
  3. 3Pima1.4 h
  4. 4Yuma1.5 h
  5. 5Maricopa1.5 h

Year by year

Hours in the dark, statewide

0 2 4 6 8 ’15 ’16 ’17 1.8 ’18 1.2 ’19 1.2 ’20 1.8 ’21 1.9 ’22 2.0 ’23 1.5 ’24 1.5 ’25 US 6.6

The record

Arizona's largest outages

Statewide events with at least 2% of customers, or 25,000, out at once, by peak.

BeganStormPeak outShare
Jul 9, 2018 Thunderstorms 89,822 2.8%
Aug 17, 2021 Thunderstorms 70,945 2.2%
Jul 10, 2021 Thunderstorms 67,126 2.1%

Every county

All 15 counties

CountyHours / yrMajor outages since 2018Customers
La Paz 10 43 8,403
Gila 5.3 42 29,489
Greenlee 4.7 3 2,735
Navajo 3.2 13 84,388
Yavapai 3.0 3 120,509
Apache 1.8 5 29,549
Coconino 1.8 0 138,090
Pinal 1.8 0 216,962
Maricopa 1.5 3 1,742,493
Yuma 1.5 2 109,100
Santa Cruz 1.4 15 20,697
Pima 1.4 1 492,744
Mohave 0.8 0 149,928
Cochise 0.6 4 80,227
Graham 0.1 0 19,659

Who keeps the lights on

Utilities in Arizona

Reliability and residential price as reported to the EIA for the latest year. Outage minutes include major storm days.

UtilityTypeOutage min / yrExcl. major storms¢/kWhCustomers
Arizona Public Service Co Investor Owned 73 73 17.0 1.3M
Salt River Project Political Subdivision 66 50 14.0 1.1M
Tucson Electric Power Co Investor Owned 42 42 14.9 416k
UNS Electric, Inc Investor Owned 81 64 17.0 95k
Trico Electric Cooperative Inc Cooperative 90 66 14.3 54k
Sulphur Springs Valley E C Inc Cooperative 92 83 14.6 46k
Mohave Electric Cooperative, Inc. Cooperative 197 152 11.3 42k
Navopache Electric Coop, Inc Cooperative – – 13.5 41k
Sunrun Inc. Behind the Meter – – 14.4 40k
Tesla Inc. Behind the Meter – – 12.2 40k
Electrical Dist No3 Pinal County Political Subdivision 30 30 14.0 33k
Navajo Tribal Utility Authority State 216 216 16.5 27k
City of Mesa Municipal 52 39 20.6 16k
USBIA-San Carlos Project Federal – – 16.4 12k
SunPower Capital, LLC Behind the Meter – – 16.8 11k