AI data center sites in Arizona
15 Arizona counties scored on transmission, the interconnection queue, power price and tax. Updated October 18, 2026.
Open a county for its queue requests, substations, plants and data centers.
| County | Score | Pipeline | Power price |
|---|---|---|---|
| 85 | 3.8 GW | 7.7¢/kWh | |
| 72 | 2.3 GW | 7.7¢/kWh | |
| 71 | 1.9 GW | 7.7¢/kWh | |
| 68 | 2.7 GW | 7.7¢/kWh | |
| 64 | 1.8 GW | 7.7¢/kWh | |
| 60 | 351 MW | 7.7¢/kWh | |
| 60 | - | 7.7¢/kWh | |
| 59 | 4.5 GW | 7.7¢/kWh | |
| 58 | 267 MW | 7.7¢/kWh | |
| 55 | - | 7.7¢/kWh | |
| 49 | - | 7.7¢/kWh | |
| 39 | - | 7.7¢/kWh | |
| 38 | - | 7.7¢/kWh | |
| 35 | - | 7.7¢/kWh | |
| 29 | - | 7.7¢/kWh |
Pipeline: active generation and storage requests in the ISO queue, or EIA planned plants where larger (outside the ISOs). Top kV: highest substation voltage. Power price: the state's industrial average. DCs: GPU colocation, mining sites and AI campuses.
What the data shows
The strongest Arizona counties for a large AI load are Maricopa County (85), Pinal County (72) and Navajo County (71) on the site score. Arizona sits in utility territory and CAISO; its ISO queues hold 7.4 GW of active generation and storage requests, 4 GW of them with a signed interconnection agreement, and it has 42 substations at 345 kV and up.
Industrial power averaged 7.7¢/kWh (EIA, July 2026 YTD), against 8.2¢/kWh a year earlier, the 11th lowest of the 50 states and DC. Arizona has paused new applications for its data center sales tax exemption. We track 3 AI campuses and 33 GPU-ready colocation facilities here.
Top 6 counties in detail
1. Maricopa CountyUtility: Salt River Project
Site score 85 of 100
- Transmission
- 25/25
- Generation pipeline
- 18/20
- Industrial power price
- 19/20
- Existing and retiring plants
- 9/15
- Sales tax exemption
- 4/10
- Data center activity
- 10/10
- Market
- Utility: Salt River Project
- Queue (active)
- 1.1 GW
- Agreement signed
- 0 MW
- Planned plants (EIA)
- 3.8 GW
- Top substation
- 500 kV
- Substations 230 kV+
- 56
- Operating plants
- 24 GW
- Retired or retiring
- 0 MW
- Industrial power, AZ
- 7.7¢/kWh
- Sales tax exemption
- Paused
Largest queue requests
| Project | Point of interconnection | MW | Type | Stage |
|---|---|---|---|---|
| HARQUAHALA FLATS 2CAISO 2027, in service 2028-04 | Delaney Substation 500 kV | 400 | Solar or wind + storage | In study |
| HARQUAHALA SUNRISECAISO 1678, in service 2030-04 | Delaney Substation 500 kV | 300 | Solar or wind + storage | In study |
| VULCANCAISO 1534, in service 2027-12 | Hassayampa Common Bus 500 kV | 250 | Solar or wind + storage | In study |
| HARQUAHALA SUNRISE 2CAISO 2029, in service 2026-09 | Delaney Substation 500 kV | 150 | Solar or wind + storage | In study |
| AGUA CALIENTE SOLAR 2CAISO 1222, in service 2016-12 | Hoodoo Wash Switchyard 500 kV | 20 | Solar | In study |
Substations, 115 kV and up
- PINNACLE PEAK APS · 18 lines500 kV
- WESTWING · 12 lines500 kV
- HASSAYAMPA · 11 lines500 kV
- RUDD · 8 lines500 kV
- PALO VERDE · 7 lines500 kV
- KYRENE · 7 lines500 kV
- GILA RIVER · 6 lines500 kV
- BROWNING · 5 lines500 kV
Planned, retiring and retired plants
- Saddleback Generation Station · Gas, planned 20301.3 GW
- Desert Sand BESS · Storage, planned 2028600 MW
- Maricopa Solar · Storage, planned 2026550 MW
- Red Hawk · Gas, planned 2027392 MW
- Romero Energy Center · Storage, planned 2027225 MW
- Romero Energy Center II, LLC · Storage, planned 2028225 MW
- Desert Bloom · Storage, planned 2026150 MW
- Agave · Storage, planned 2026150 MW
Data centers, AI campuses and mining sites
- Hassayampa Ranch data center campus · AI campus, announced, 1.5 GW · Phoenix Business Journal via Orion
- Tract Buckeye data center park · AI campus, announced, 1.8 GW · AZFamily
- Edged Edged Phoenix (PHX01) · GPU colocation, Mesa, 36 MW, liquid cooling
- EdgeCore Digital Infrastructure Phoenix campus (Mesa) · GPU colocation, Mesa, 496 MW, liquid cooling
- Aligned Data Centers PHX-01/02/03 and PHX-05 · GPU colocation, Phoenix, 180 MW, liquid cooling
- Aligned Data Centers PHX-04 and PHX-06 · GPU colocation, Chandler, liquid cooling
- CyrusOne PHX1-PHX8 (Chandler campus) · GPU colocation, Chandler, 169 MW
- Iron Mountain Data Centers AZP-1 / AZP-2 / AZP-3 · GPU colocation, Phoenix, 125 MW
- NTT Global Data Centers PH1 · GPU colocation, Mesa, 36 MW
- phoenixNAP Phoenix flagship data center · GPU colocation, Phoenix, liquid cooling
- Flexential Phoenix - Deer Valley · GPU colocation, Phoenix, 5.02 MW
- 5C Data Centers PHX01 · GPU colocation, Phoenix, 20 MW, liquid cooling
- Aligned Data Centers PHX-07 · GPU colocation, Waddell, liquid cooling
- Centersquare PHX3 · GPU colocation, Mesa, 17.3 MW
- Compass Datacenters El Mirage campus · GPU colocation, El Mirage, 108 MW
- Compass Datacenters Phoenix campus (Goodyear) · GPU colocation, Goodyear
- Digital Realty PHX10 · GPU colocation, Phoenix
- Digital Realty PHX15 · GPU colocation, Chandler
- EdgeConneX PHX01 · GPU colocation, Tempe, 4.5 MW
- Expedient Phoenix data center · GPU colocation, Phoenix, 3.6 MW
- H5 Data Centers Phoenix data center · GPU colocation, Chandler, 26 MW
- Iron Mountain Data Centers AZS-1 · GPU colocation, Scottsdale, 5.7 MW
- Metrobloks Phoenix data center · GPU colocation, Phoenix, 23 MW
- Novva Data Centers Mesa campus · GPU colocation, Mesa, 300 MW
- Prime Data Centers PHX01 · GPU colocation, Avondale, 240 MW
- QTS Data Centers Phoenix 2 (PHX2, DC1-DC5) · GPU colocation, Phoenix, 210 MW
- QTS Data Centers Phoenix 3 (PHX3) · GPU colocation, Glendale
- QTS Data Centers Phoenix 4 · GPU colocation, Avondale
- STACK Infrastructure PHX01 · GPU colocation, Avondale, 225 MW
- STACK Infrastructure PHX02 · GPU colocation, Phoenix, 250 MW
- Stream Data Centers Phoenix I (PHXA campus) · GPU colocation, Goodyear, 280 MW
- US Signal AZ01 Phoenix · GPU colocation, Gilbert, 0.5 MW
- Vantage Data Centers AZ1 (Phoenix campus) · GPU colocation, Goodyear, 176 MW
Colocation from our GPU colocation list; mining sites from the miner AI conversion tracker.
2. Pinal CountyUtility: Salt River Project
Site score 72 of 100
- Transmission
- 25/25
- Generation pipeline
- 15/20
- Industrial power price
- 19/20
- Existing and retiring plants
- 9/15
- Sales tax exemption
- 4/10
- Data center activity
- 0/10
- Market
- Utility: Salt River Project
- Queue (active)
- 0 MW
- Agreement signed
- 0 MW
- Planned plants (EIA)
- 2.3 GW
- Top substation
- 500 kV
- Substations 230 kV+
- 17
- Operating plants
- 4.9 GW
- Retired or retiring
- 2 MW
- Industrial power, AZ
- 7.7¢/kWh
- Sales tax exemption
- Paused
Substations, 115 kV and up
- SAGUARO · 9 lines500 kV
- TEST TRACK · 8 lines500 kV
- TORTOLITA · 6 lines500 kV
- SILVER KING · 5 lines500 kV
- PINAL CENTRAL · 5 lines500 kV
- PINAL WEST · 4 lines500 kV
- GOLDFIELD · 7 lines230 kV
- COOLIDGE · 6 lines230 kV
Planned, retiring and retired plants
- THREE SISTERS Solar Generation and BESS · Storage, planned 2029600 MW
- Sawtooth Solar · Storage, planned 2028500 MW
- Valley Farms Energy Center · Storage, planned 2027400 MW
- Coolidge Generation Station · Gas, planned 2027297 MW
- Selma Energy Center · Storage, planned 2027275 MW
- Kitt Solar · Storage, planned 2026200 MW
3. Navajo CountyUtility: Arizona Public Service
Site score 71 of 100
- Transmission
- 25/25
- Generation pipeline
- 14/20
- Industrial power price
- 19/20
- Existing and retiring plants
- 9/15
- Sales tax exemption
- 4/10
- Data center activity
- 0/10
- Market
- Utility: Arizona Public Service
- Queue (active)
- 0 MW
- Agreement signed
- 0 MW
- Planned plants (EIA)
- 1.9 GW
- Top substation
- 500 kV
- Substations 230 kV+
- 5
- Operating plants
- 711 MW
- Retired or retiring
- 426 MW
- Industrial power, AZ
- 7.7¢/kWh
- Sales tax exemption
- Paused
Substations, 115 kV and up
- CHOLLA · 8 lines500 kV
- SUGARLOAF · 2 lines500 kV
- FOUR CORNERS · 4 lines345 kV
- KAYENTA · 2 lines230 kV
- LONGHOUSE VALLEY · 2 lines230 kV
Planned, retiring and retired plants
- Snowflake A Solar and BESS · Solar, planned 2027950 MW
- Hashknife Energy Center LLC · Solar, planned 2026550 MW
- Cholla · Coal, retired 2025426 MW
- Hashknife Energy Center II LLC · Solar, planned 2027400 MW
4. Coconino CountyUtility: WAPA Desert Southwest
Site score 68 of 100
- Transmission
- 25/25
- Generation pipeline
- 11/20
- Industrial power price
- 19/20
- Existing and retiring plants
- 9/15
- Sales tax exemption
- 4/10
- Data center activity
- 0/10
- Market
- Utility: WAPA Desert Southwest
- Queue (active)
- 0 MW
- Agreement signed
- 0 MW
- Planned plants (EIA)
- 2.7 GW
- Top substation
- 500 kV
- Substations 230 kV+
- 7
- Operating plants
- 2 GW
- Retired or retiring
- 3 MW
- Industrial power, AZ
- 7.7¢/kWh
- Sales tax exemption
- Paused
Substations, 115 kV and up
- Unnamed · 5 lines500 kV
- MOENKOPI · 4 lines500 kV
- CEDAR MOUNTAIN · 2 lines500 kV
- GLEN CANYON · 6 lines345 kV
- FLAGSTAFF · 4 lines345 kV
- COCONINO · 2 lines230 kV
- LEUPP · 2 lines230 kV
- POWELL · 1 lines138 kV
Planned, retiring and retired plants
- CO Bar Solar and BESS · Storage, planned 2027800 MW
- CO Bar D Solar and BESS · Storage, planned 2028788 MW
- Red Antelope Solar & Energy Storage Farm · Solar, planned 2028700 MW
- CO Bar C Solar and BESS · Storage, planned 2027412 MW
5. Yuma CountyCAISO
Site score 64 of 100
- Transmission
- 19/25
- Generation pipeline
- 13/20
- Industrial power price
- 19/20
- Existing and retiring plants
- 9/15
- Sales tax exemption
- 4/10
- Data center activity
- 0/10
- Market
- CAISO
- Queue (active)
- 1.8 GW
- Agreement signed
- 800 MW
- Planned plants (EIA)
- 1.1 GW
- Top substation
- 500 kV
- Substations 230 kV+
- 2
- Operating plants
- 2.4 GW
- Retired or retiring
- 0 MW
- Industrial power, AZ
- 7.7¢/kWh
- Sales tax exemption
- Paused
Largest queue requests
| Project | Point of interconnection | MW | Type | Stage |
|---|---|---|---|---|
| HOODINICAISO 1663, in service 2031-12 | Hoodoo Wash Switchyard 500 kV | 450 | Solar or wind + storage | In study |
| DATELAND ENERGY COMPLEXCAISO 1812, in service 2028-07 | Hoodoo Wash Switchyard 500 kV | 350 | Solar or wind + storage | Agreement signed |
| REMYCAISO 2154, in service 2029-06 | Hoodoo Wash Switchyard 500 kV | 300 | Solar or wind + storage | In study |
| IRONWOOD SOLARCAISO 1435, in service 2030-06 | Hoodoo Wash Switchyard 500 kV | 250 | Solar or wind + storage | Agreement signed |
| WHITE WING RANCH SOLARCAISO 1062, in service 2026-06 | Hoodoo Wash Switchyard 500 kV | 200 | Solar or wind + storage | Agreement signed |
| ALISA SOLAR ENERGY COMPLEXCAISO 2161, in service 2028-06 | Hoodoo Wash - North Gila 500 kV | 200 | Solar or wind + storage | In study |
Substations, 115 kV and up
- NORTH GILA · 2 lines500 kV
- HOODOO WASH · 2 lines500 kV
- WELTON MOHAWK · 3 lines161 kV
- DOME TAP · 3 lines161 kV
- GILA · 3 lines161 kV
- KOFA · 2 lines161 kV
- YUCCA · 1 lines161 kV
Planned, retiring and retired plants
- Pioneer Clean Energy Center · Solar, planned 2027600 MW
- Elisabeth Solar · Solar, planned 2028350 MW
- Ironwood Solar · Solar, planned 2026168 MW
6. Cochise CountyUtility: WAPA Desert Southwest
Site score 60 of 100
- Transmission
- 22/25
- Generation pipeline
- 7/20
- Industrial power price
- 19/20
- Existing and retiring plants
- 8/15
- Sales tax exemption
- 4/10
- Data center activity
- 0/10
- Market
- Utility: WAPA Desert Southwest
- Queue (active)
- 0 MW
- Agreement signed
- 0 MW
- Planned plants (EIA)
- 351 MW
- Top substation
- 345 kV
- Substations 230 kV+
- 5
- Operating plants
- 1.7 GW
- Retired or retiring
- 0 MW
- Industrial power, AZ
- 7.7¢/kWh
- Sales tax exemption
- Paused
Substations, 115 kV and up
- WINCHESTER · 3 lines345 kV
- APACHE · 5 lines230 kV
- BUTTERFIELD · 3 lines230 kV
- RED TAIL · 2 lines230 kV
- SAN RAFAEL · 1 lines230 kV
- FORT HUACHUCA · 1 lines138 kV
- ADAMS · 3 lines115 kV
- KARTCHNER · 1 lines115 kV
Planned, retiring and retired plants
- Winchester Solar I, LLC · Storage, planned 2027176 MW
- Winchester Solar II, LLC · Storage, planned 2027176 MW
Data center tax exemption in Arizona
Arizona computer data center tax relief program (A.R.S. 41-1519; TPT and use tax deductions under 42-5061, 42-5075, 42-5159, 42-6004)
Certified computer data centers may deduct purchases of data center equipment from transaction privilege and use tax for 10 full calendar years (20 for sustainable redevelopment projects) after investing at least $25M in counties of 800,000 or fewer residents or $50M in larger counties within five years of certification, but the Arizona Commerce Authority may not accept applications for new data centers from July 1, 2026 through June 30, 2029; the statute's application cutoff is December 31, 2033.
Recent change: Laws 2026, ch. 140 (HB 4168, signed June 13, 2026) bars new applications and new qualification for computer data centers from July 1, 2026 through June 30, 2029; news reports say centers already certified keep their relief.
Source: Arizona Legislature, accessed 2026-10-17. General information, not tax advice; ask your tax advisor.
AI data centers being built in Arizona
| Campus | Developer | County | MW | Status | Source |
|---|---|---|---|---|---|
| Tract Buckeye data center park | Tract | Maricopa County | 1,800 | announced | AZFamilyAug 30, 2024 |
| Hassayampa Ranch data center campus | Arizona Land Consulting | Maricopa County | 1,500 | announced | Phoenix Business Journal via OrionDec 2025 |
| Project Blue | Beale Infrastructure | Pima County | 600 | under construction | KOLDMay 14, 2026 |
Busiest points of interconnection in Arizona
| # | Point of interconnection | County | ISO | Requests | Queued MW | Mostly |
|---|---|---|---|---|---|---|
| 1 | Delaney-Colorado River 500 kV Line | La Paz County, AZ | CAISO | 1 | 3,200 | Solar or wind + storage |
| 2 | Hoodoo Wash Switchyard 500 kV | Yuma County, AZ | CAISO | 5 | 1,550 | Solar or wind + storage |
How the score works
Six parts out of 100: transmission (25), generation in the queue (20), the state's industrial power price (20), existing and retiring plants (15), sales tax exemption (10) and data center activity (10). The site finder's methodology prints each formula and every source with its date. Markets: Utility territory (no ISO/RTO), CAISO (California).
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Discuss a transaction
Funding a data center or the GPUs going into one in Arizona? Tell us about the site and the capital you need, and we will come back with the lenders and the structure that fit. Operators raising debt for a cluster can start at gpulenders.com.
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