Electric Consumer

Editor: Katerine G., Editor & Data Researcher · Research & publishing: Electric Consumer Editorial Team · Data retrieved · Sources named on this page: EIA-861 · How we got these numbers · Report an error

Arizona power outages by utility

11 Arizona utilities report outage minutes to EIA. The state median is 81 minutes a year; the range runs from 25 to 267.

Ranking by outage minutes

Arizona, SAIDI without major event days, 2024; lower is better; 11 utilities.

RankArizona utilityOwner typeArizona home accountsSAIDI minInterruptions (SAIFI)SAIDI with stormsArizona storm sharePrice ¢/kWh
1City of MesaMunicipal15,331250.666462%16.93
2Electrical Dist No2 Pinal CountyPolitical Subdivision5,218310.445342%13.26
3Salt River ProjectPolitical Subdivision1,053,407530.90589%13.46
4UNS Electric, IncInvestor Owned95,191600.697217%16.02
5Tucson Electric Power CoInvestor Owned412,747680.8511340%15.63
6Arizona Public Service CoInvestor Owned1,256,120810.88877%16.45
7Trico Electric Cooperative IncCooperative52,450830.6815045%14.17
8Electrical Dist No3 Pinal CountyPolitical Subdivision32,009861.2413235%13.93
9Mohave Electric Cooperative, Inc.Cooperative41,009118No data17131%11.20
10Sulphur Springs Valley E C IncCooperative46,0081250.9213810%13.49
11Gila River Indian Utility Authority (GRICUA)Cooperative2,6822674.412670%14.25

Arizona outage minutes by owner type

In Arizona, 96% of 3,134,733 home accounts sit with the 11 qualifying utilities out of 18 in the file. Arizona customer-weighted SAIDI is 70 minutes against a median of 81, and 3 of 11 Arizona utilities exceed the U.S. median of 99. Counting major event days adds a median 31% to SAIDI.

Arizona owner typeArizona utilitiesArizona home accountsArizona median SAIDIArizona weighted SAIDIArizona median SAIFIArizona storm shareArizona median price ¢/kWh
Investor Owned31,764,05868770.8517%16.02
Political Subdivision31,090,63453540.9035%13.46
Cooperative4142,1491211100.9220%13.83
Municipal115,33125250.6662%16.93

By owner type, Municipal utilities have the lowest median SAIDI in Arizona (25 minutes, 1 of 11) and Cooperative the highest (121 minutes, 4 of 11).

Arizona utilities that stand out

Why it stands outArizona utilityArizona owner typeArizona accountsArizona SAIDI minArizona SAIDI rankArizona SAIFIArizona SAIDI with stormsArizona price ¢/kWhArizona price rank
the most reliableCity of MesaMunicipal15,331251 of 110.666416.9311 of 11
the least reliableGila River Indian Utility Authority (GRICUA)Cooperative2,68226711 of 114.4126714.257 of 11
the largestArizona Public Service CoInvestor Owned1,256,120816 of 110.888716.4510 of 11
the most improvedElectrical Dist No2 Pinal CountyPolitical Subdivision5,218312 of 110.445313.262 of 11
the cheapestMohave Electric Cooperative, Inc.Cooperative41,0091189 of 11No data17111.201 of 11

Does a higher price buy fewer outages?

Each dot is one of 11 Arizona utilities.

Home price and outage minutes, Arizona utilities01002003001012141618Home price, cents per kWhSAIDI, minutes a yearCity of Mesa: 16.93 ¢/kWh, 25 minElectrical Dist No2 Pinal County: 13.26 ¢/kWh, 31 minSalt River Project: 13.46 ¢/kWh, 53 minUNS Electric, Inc: 16.02 ¢/kWh, 60 minTucson Electric Power Co: 15.63 ¢/kWh, 68 minArizona Public Service Co: 16.45 ¢/kWh, 81 minTrico Electric Cooperative Inc: 14.17 ¢/kWh, 83 minElectrical Dist No3 Pinal County: 13.93 ¢/kWh, 86 minMohave Electric Cooperative, Inc.: 11.20 ¢/kWh, 118 minSulphur Springs Valley E C Inc: 13.49 ¢/kWh, 125 minGila River Indian Utility Authority (GRICUA): 14.25 ¢/kWh, 267 min
Arizona, 2024: first 8 of 11 rows
Home price, cents per kWhSAIDI, minutes a year
City of Mesa16.9325
Electrical Dist No2 Pinal County13.2631
Salt River Project13.4653
UNS Electric, Inc16.0260
Tucson Electric Power Co15.6368
Arizona Public Service Co16.4581
Trico Electric Cooperative Inc14.1783
Electrical Dist No3 Pinal County13.9386

11 rows from EIA-861 survey.

CSV

Arizona utilities, change in their own SAIDI

First to last year each utility reported, best change first.

RankArizona utilityArizona yearsArizona SAIDI firstArizona SAIDI lastArizona change
1Electrical Dist No2 Pinal County2020 to 202476431-96%
2Electrical Dist No3 Pinal County2018 to 20254130-26%
3Arizona Public Service Co2015 to 20258773-16%
4UNS Electric, Inc2015 to 20257264-11%
5Sulphur Springs Valley E C Inc2015 to 20258683-4%
6Trico Electric Cooperative Inc2015 to 20256366+6%
7City of Mesa2018 to 20242225+14%
8Tucson Electric Power Co2015 to 20245968+15%
9Salt River Project2015 to 20254250+20%
10Mohave Electric Cooperative, Inc.2015 to 202475118+57%
11Gila River Indian Utility Authority (GRICUA)2022 to 2025121264+117%

Analyst note

The reporters cover 96% of Arizona home accounts, rank 3 of 40. Of 11 Arizona utilities with 1,000+ home accounts that report SAIDI, City of Mesa is lowest at 25 minutes a year and Gila River Indian Utility Authority (GRICUA) highest at 267, a 10.8 to 1 spread. The state median is 81 minutes, -19% against the U.S. median reporter. Over each utility's own record, Electrical Dist No2 Pinal County improved most (764 to 31 minutes, -96%, 2020 to 2024) and Gila River Indian Utility Authority (GRICUA) changed the other way (121 to 264, +117%); 5 of 11 fell. Home price and outage minutes line up at r = -0.27 across 11 Arizona utilities: the pricier ones report fewer minutes. That is Arizona's pattern, not a cause.

Questions on Arizona outages

How much of Arizona does this ranking cover?

96% of home accounts: 11 utilities of 18.

Which Arizona utility has the fewest outage minutes?

City of Mesa: 25 minutes a year, SAIDI without major events, 2024.

Which Arizona utility has the most?

Gila River Indian Utility Authority (GRICUA): 267 minutes a year in 2024.

What is the typical SAIDI in Arizona?

The median of 11 reporting utilities is 81 minutes, -19% on the U.S. median reporter.

Do cheaper Arizona utilities have more outages?

Across 11 utilities r = -0.27, so the link is negative: higher price goes with fewer outage minutes.

How much of Arizona outage time comes from storms?

At City of Mesa 62% of all-event SAIDI is major event days.

How reliable is the largest Arizona utility?

Arizona Public Service Co serves 1,256,120 home accounts and reports 81 minutes, rank 6 of 11; weighted by customers the state figure is 70.

Do Arizona co-ops and investor-owned utilities differ?

4 owner types report in Arizona: Municipal 1 utility with 15,331 home accounts, Political Subdivision 3 utilities with 1,090,634 home accounts, Investor Owned 3 utilities with 1,764,058 home accounts, Cooperative 4 utilities with 142,149 home accounts.

What share of Arizona home accounts do these utilities serve?

96% of 3,134,733 accounts, 11 of 18 utilities; 3 are above the U.S. median of 99 minutes.

More on Arizona

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11 Arizona utilities report outage minutes to EIA. The state median is 81 minutes a year; the range runs from 25 to 267.