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Datacenter Sites in Pima County, Arizona

Pima County has 493 scored datacenter candidate sites averaging 49.2/100 DC Readiness, with a catalogued aggregate of 2,358 MW. FEMA rates local natural-hazard risk as "Relatively Low". The county has a datacenter tax incentive on record.

At a glance

Pima County, Arizona has 493 scored datacenter candidate sites averaging 49.2/100 DC Readiness, roughly in line with the Arizona average of 48.5. It ranks 2nd of 15 Arizona counties by number of sites and 4th by average score. The top-scoring site is Tucson International Airport Area at 62.9/100.

493
Candidate sites
49.2/100
Avg DC Readiness
2,358 MW
Catalogued capacity
theoretical aggregate
Relatively Low
Hazard rating
◆ Loading map…
≥ 7560–7540–60≤ 40
Top 25 in Pima County

Site-selection context for Pima County

Yesproperty_tax_reduction
Datacenter tax incentive
14.34¢/kWh
Commercial electricity
9.84¢/kWh
Industrial electricity
10
Fiber providers
Extremely High
Water stress
$504
Land price / acre
3,400
Cooling degree days
1,500
Heating degree days
63°F
Mean annual temp

Incentive detail: Government Property Lease Excise Tax (GPLET) for qualified facilities on government land.

How does Pima County compare with other counties in Arizona?

By number of scored sites, Pima County ranks 2nd of the 15 Arizona counties with a county page, holding 13% of the state's 3,816 sites. Its average DC Readiness of 49.2/100 ranks 4th in the state and is roughly in line with the national average of 53.0. Nationally it has the 17th-largest site inventory of 2,964 counties with five or more sites. 0 sites score 70 or higher and 19 score 55 or higher.

What types of datacenter sites are in Pima County?

Industrial sites are the most common (319, 65% of the county's inventory), followed by federal excess (108) and former mine (31). Site type reflects how the parcel was identified — next to a substation, on a former mine or brownfield, on industrial or federal excess land — and is scored on the same 14 factors either way.

What are power cost, hazard, water and fiber conditions in Pima County?

Industrial electricity averages 9.84¢/kWh and commercial 14.34¢/kWh. FEMA's National Risk Index rates the county "Relatively Low" (22). WRI water stress is extremely high. 10 fiber providers report service in the county. The climate runs 3,400 cooling degree days a year with a mean temperature of 63°F. Land is valued around $504 an acre.

By site type

Top datacenter sites in Pima County

Top datacenter sites in Pima County
SiteTypeVoltageCapacityQueue waitScore
Tucson International Airport AreaBrownfield230 kV3 MW3.5 yrs62.9
OZ PimaGreenfield——3.5 yrs62.8
TUCSONSubstation-Adjacent345 kV600 MW3.5 yrs62.7
OZ PimaGreenfield——3.5 yrs62.4
OZ PimaGreenfield——3.5 yrs61.6
EC Near H Wilson Sundt Generating StationGreenfield——3.5 yrs61.5
OZ PimaGreenfield——3.5 yrs60.6
EC Near H Wilson Sundt Generating StationGreenfield——3.5 yrs60.0
OZ PimaGreenfield——3.5 yrs59.6
EC Near H Wilson Sundt Generating StationGreenfield——3.5 yrs59.6
OZ PimaGreenfield——3.5 yrs59.6
OZ PimaGreenfield——3.5 yrs59.4
EC Near H Wilson Sundt Generating StationGreenfield——3.5 yrs59.3
OZ PimaGreenfield——3.5 yrs58.9
PETRIESubstation-Adjacent138 kV100 MW3.5 yrs56.7
SANTA CRUZSubstation-Adjacent138 kV100 MW3.5 yrs56.7
RILLITOSubstation-Adjacent138 kV100 MW3.5 yrs55.6
DEL CERROSubstation-Adjacent138 kV100 MW3.5 yrs55.5
EC Near H Wilson Sundt Generating StationGreenfield——3.5 yrs55.2
TAP310962Substation-Adjacent230 kV300 MW3.5 yrs54.6
SNYDER HILLSubstation-Adjacent115 kV100 MW3.5 yrs54.4
MOUNTAINSubstation-Adjacent69 kV50 MW3.5 yrs54.1
SAN XAVIERSubstation-Adjacent115 kV100 MW3.5 yrs54.0
VALENCIASubstation-Adjacent115 kV100 MW3.5 yrs53.9
BRAWLEYSubstation-Adjacent115 kV100 MW3.5 yrs53.3

Every scored site in Pima County

All 493 sites, best first.

Pima County datacenter FAQ

How many datacenter sites are in Pima County?

493 scored datacenter candidate sites, averaging 49.2/100 DC Readiness. That is the 2nd-most of 15 Arizona counties with five or more sites.

What is the highest-scoring datacenter site in Pima County?

Tucson International Airport Area scores 62.9/100 DC Readiness, the highest of the 493 scored sites in Pima County (a brownfield site).

Does Pima County offer datacenter tax incentives?

Government Property Lease Excise Tax (GPLET) for qualified facilities on government land.

What is the natural-hazard risk in Pima County?

FEMA's National Risk Index rates Pima County as "Relatively Low" (score 22).

What are industrial electricity rates in Pima County?

Average industrial electricity is 9.84¢/kWh and commercial is 14.34¢/kWh in Pima County.

More in Arizona

About this data

Source: GridCensus composite of HIFLD transmission and substation data, EIA, FEMA National Risk Index, FCC broadband data, PeeringDB and ISO interconnection queues, as published November 12, 2026 — GridCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.

Cite as: GridCensus, “Datacenter candidate sites in Pima County, Arizona”, https://gridcensus.com/datacenter-sites/arizona/pima-county (data as of November 12, 2026).

Dataset updated . Screening estimates derived from public data sources.

Go deeper than the public screen

Every site and score for Pima County, Arizona is free to browse. Pro adds Watchtower on 25 sites, alerts when new candidate sites, datacenters or interconnection-queue requests appear in your markets, score and capacity history, and CSV export. Enterprise adds team seats, weekly data files for all 147,272 sites, the REST API and an MCP server for AI tools.

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