Arizona
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State Intelligence
Updated May 26, 2026Utility Landscape
Arizona Public Service (APS)
IOUCentral and northern Arizona, including metro Phoenix, Flagstaff, and Yuma areas; approximately 1.4 million customers
APS completed a major rate case settlement in 2023 (Docket E-01345A-22-0141) authorizing modest base rate increases and updated renewable energy riders. The ACC has maintained scrutiny on APS's demand charges and rooftop solar net metering compensation structure following prolonged stakeholder conflict.
Tucson Electric Power (TEP)
IOUSouthern Arizona including Tucson metro and surrounding Pima County communities; approximately 440,000 customers
TEP filed a general rate case in 2024 seeking rate increases tied to grid modernization capital investments and accelerated coal retirement costs from the Springerville Generating Station. The utility is actively pursuing its 2035 clean energy transition commitments under ACC-approved integrated resource plan guidelines.
UniSource Energy Services (UNS Electric / UNS Gas)
IOUUNS Electric serves Mohave and Santa Cruz counties; UNS Gas serves portions of northern and southeastern Arizona
As a TEP sister company under Fortis Inc., UniSource has coordinated rate case filings with cost recovery focused on distribution upgrades and gas system integrity. The ACC has flagged affiliate transaction transparency as a continuing compliance concern.
Salt River Project (SRP)
muniEastern Maricopa County and portions of Pinal County including Mesa, Scottsdale, Tempe, Chandler, and Gilbert; approximately 1.1 million customers
SRP is a political subdivision not subject to ACC rate jurisdiction, setting its own rates via an elected board. Despite this exemption, SRP faces ongoing legislative and public pressure over its rooftop solar demand charge structure, which critics argue discourages distributed generation adoption.
Sulphur Springs Valley Electric Cooperative (SSVEC)
coopRural southeastern Arizona including Cochise and Graham counties
SSVEC is subject to ACC jurisdiction and has pursued cost recovery for grid hardening investments in a high-wildfire-risk service territory. The cooperative has also engaged in proceedings related to broadband deployment over utility infrastructure in underserved rural areas.
Navopache Electric Cooperative
coopWhite Mountains region of eastern Arizona and portions of western New Mexico; serves rural and tribal communities
Navopache has sought ACC approval for rate adjustments tied to wholesale power cost volatility and aging transmission infrastructure. Tribal consultation requirements for planned grid upgrades in its service territory have introduced procedural complexity into recent capital project filings.
Key Issues
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APS and TEP net energy metering successor tariff proceedings: The ACC is actively deliberating on a post-NEM compensation framework following the expiration of grandfathered NEM 2.0 protections, with solar advocates and utilities contesting the appropriate export credit rate and cost-of-service allocation methodology.
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Integrated Resource Plan (IRP) compliance and coal retirement sequencing: The ACC is reviewing utility IRP filings for alignment with the 2050 carbon-free electricity standard; TEP's Springerville coal plant retirement timeline and associated stranded cost recovery remain contested among industrial customers and environmental intervenors.
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Grid modernization and AMI deployment cost recovery: APS and TEP have both sought recovery of advanced metering infrastructure and distribution automation investments through rate riders; ACC commissioners are divided on whether to allow tracker mechanisms or require inclusion in base rate cases to ensure rate stability.
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Residential rate design and low-income affordability: The ACC is conducting a generic docket examining fixed charge levels, inclining block rate structures, and the adequacy of existing low-income assistance programs (LIAP) as electrification increases average bills for lower-consumption households.
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Wildfire mitigation cost recovery and liability framework: Following increased wildfire risk across utility service territories, the ACC is evaluating proposed wildfire mitigation plans and associated cost recovery mechanisms, including whether utilities may securitize wildfire-related capital expenditures under Arizona statute.
Upcoming
Estimated deadline for ACC Staff initial comments in TEP general rate case (Docket E-04204A-24-XXXX); procedural schedule anticipated to set evidentiary hearing for Q4 2026 based on standard ACC case timelines.
Estimated ACC open meeting at which commissioners are expected to consider a draft decision on the post-NEM successor tariff rulemaking (Docket RU-00000A-24-XXXX); final vote may be continued to September 2026 pending stakeholder briefing requests.
Estimated statutory deadline for ACC to act on utility IRP compliance determinations for 2025 filing cycle; utilities including APS and TEP must demonstrate alignment with renewable portfolio standard milestones or face compliance orders.
Estimated commencement of evidentiary hearings in TEP general rate case before an ACC Administrative Law Judge; hearing schedule anticipated to run through December 2026 with a final decision expected in Q2 2027.
Commissioner Watch
View all ↗The newly seated Arizona Corporation Commission unanimously elected Commissioner Kevin Thompson as Chair on January 7, 2025.
Rachel Walden was sworn in to the Arizona Corporation Commission on January 6, 2025, beginning her first term after winning election in November 2024.
Rene Lopez was sworn in to the Arizona Corporation Commission on January 6, 2025, beginning his first term after winning election in November 2024.
Staff
105| Name | Title | Phone |
|---|---|---|
| Douglas R R. Clark | Executive Director | (602) 542-3931 |
| Mark Dinell | Securities Division Director | (602) 542-0626 |
| Tanya Gibson | Corporations Division Director | (602) 542-0776 |
| Steve M. Olea | Special Advisor to the Commission | (602) 542-3707 |
| Jane Rodda | Chief Administrative Law Judge | (602) 542-4250 |
| Connie Walczak | Utilities Division Consumer Services Manager | (602) 542-0291 |
| Chris Watson | Safety Division Director | (602) 320-6219 |
| Nicole Garcia | Public Information Officer | (602) 542-0728 |
| Alex Abramson | Public Utilities Analyst | (602) 542-3931 |
| Thomas Abshire | Electric Engineer | (602) 542-0941 |
| Monique Aceves | Public Utilities Analyst II | (602) 542-6652 |
| candrea Allen | Analyst | (602) 364-0235 |
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