Public data · Free to use
Arizona Data Center Power Rules: Large-Load Tariffs and State Law
How Arizona’s utilities and lawmakers handle data-center-sized power requests: 3 utilities and 1 state measure, compiled from public filings, with a source on every entry.
Last checked October 22, 2026All states
Utilities
Arizona utilities and their large-load rules.
Arizona Public Service
AZ · Non-RTO West · Pinnacle West
In reviewJul 2026Extra High Load Factor (XHLF) rate schedule, in the 2026 APS rate case
Arizona regulators are deciding changes to the APS rate for very large, steady users like data centers, with a vote due by December 31, 2026.
- Changes to the XHLF rate that applies to large users such as data centers
- Proposed formula rate that would assign cost increases caused by extra-large users to those customers
- Updated cost allocation for system investments
Sources: Arizona Corporation Commission, What's Next in the APS Rate Case (2026); APS, APS Rate Case Hearing Concludes, Process Moves to Next Phase (2026)
Salt River Project
AZ · Non-RTO West
Approved2025Large Customer Integration Process (LCIP) and E-67 price plan
SRP has new large loads pay upfront for the upgrades they need, and new accounts of 20 MW or more face minimum bills.
- Applies to: 20 MW+ of forecasted load (minimum billing under E-67)
- Customer pays upfront for its specific grid upgrades after SRP's study
- Minimum billing for new accounts of 20 MW or more
- SRP plans service only after the project has zoning and local approval
Tucson Electric Power
AZ · Non-RTO West · UNS Energy (Fortis)
ApprovedDec 2025Special electric service agreement for Project Blue (Pima County)
Arizona regulators approved a TEP contract to serve one large data center, with minimum bills and early exit protections for other customers.
- Individual contract reviewed by the Corporation Commission
- Capacity limited to 286 MW
- Early termination protections
- Minimum monthly bills
- Service from existing generation starting in 2027
Sources: Arizona Public Media, Arizona regulators approve TEP deal to power controversial Pima County data center (2025); Tucson Electric Power, Five things to know about powering data centers (n.d.)
State law and regulation
Arizona laws and rulemakings.
in review · 2026-04
Corporation Commission large load users workshop (Docket E-00000A-25-0069)
Commission favors utility high load factor tariffs plus individual service agreements with long terms, minimum bills, collateral and termination terms.
What this can and can’t tell you
The rules are public. Whether your site can get power isn’t.
Anyone could pull these filings; we compile them so they’re easy to find. Terms change often, so confirm them with the utility or the commission docket before relying on them.
Going deeper: Data Center Site Selection in Arizona: APS, SRP, TEP, Water and Heat
This tracker · Public, free
- A utility’s published rules for large new loads
- The same answer for every site in that utility’s territory
- What the terms are if power is available
- Compiled from filings anyone can read
A BlackForge report · Site-specific
- Whether a specific parcel can actually be served, and roughly when
- Substation headroom and the realistic connection path
- Gas, water, fiber, buildable land and zoning, checked together
- Built and refreshed for your load, your timeline and your parcels
Cite this tracker
BlackForge Data Centers. "Arizona data center power rules," Large-Load Power Tracker. Last checked October 22, 2026. https://www.blackforgedatacenters.com/data-center-power-tracker/arizona
Free to reuse under CC BY 4.0 with credit.
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