Arizona
Arizona Corporation Commission
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State Intelligence
Updated Jun 1, 2026Utility Landscape
Arizona Public Service (APS)
IOUCentral and northern Arizona, including Phoenix metro, Flagstaff, and Yuma regions; largest electric utility in the state
APS completed a contentious rate case in 2023 (Docket E-01345A-22-0141) with ACC approving a modest revenue increase alongside increased fixed customer charges. The utility faces ongoing scrutiny over demand charges, rate design equity, and its integrated resource planning process targeting 100% clean energy by 2050.
Tucson Electric Power (TEP)
IOUPima County and surrounding southeastern Arizona, including Tucson metro area
TEP filed a general rate case in 2024 seeking increased revenues to recover grid modernization and renewable transition costs. TEP has been an active participant in ACC proceedings on resource adequacy and has committed to retiring coal assets at the Springerville Generating Station ahead of schedule.
UniSource Energy Services (UES) - Arizona Gas & Electric
IOUNogales, Santa Cruz County, and select rural areas in southern Arizona for electric; northern Arizona for natural gas distribution
UniSource, a subsidiary of Fortis Inc., has pursued rate adjustments tied to infrastructure upgrades in underserved rural territories. Regulatory proceedings have focused on cost recovery mechanisms for aging distribution infrastructure and propane-to-natural-gas conversion projects.
Salt River Project (SRP)
muniEastern Phoenix metro, Scottsdale, Mesa, Chandler, and portions of Maricopa and Pinal counties
SRP operates as a political subdivision and agricultural improvement district, largely exempt from ACC jurisdiction over retail rates. However, it participates in ACC proceedings affecting regional transmission and wholesale markets, and its voluntary rate structures face public pressure related to rooftop solar and electric vehicle infrastructure.
Sulphur Springs Valley Electric Cooperative (SSVEC)
coopCochise and Graham counties in southeastern Arizona, including agricultural and rural communities
SSVEC is subject to ACC jurisdiction and has engaged in proceedings related to distributed generation interconnection standards and net metering successor tariffs. The cooperative has pursued demand-side management programs in response to agricultural load growth.
Trico Electric Cooperative
coopNorthwestern Pima County and portions of Pinal County, including Marana, Saddlebrooke, and rural communities northwest of Tucson
Trico has been active in ACC dockets concerning cost-of-service reforms and updated interconnection rules for distributed energy resources. The cooperative has pursued battery storage pilot programs and is navigating load growth tied to residential development in its territory.
Key Issues
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ACC resource adequacy and integrated resource planning (IRP) reform: Following summer 2023 grid stress events in the Western Interconnection, ACC has been developing updated IRP filing requirements for Arizona IOUs, with emphasis on dispatchable capacity procurement, battery storage mandates, and demand response program expansion to ensure reliability through 2030.
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Net metering and distributed generation successor tariffs: The ACC is actively revisiting export compensation rates and fixed-charge structures for rooftop solar customers following the contentious APS rate case; proceedings are examining value-of-solar methodologies and potential reforms that could significantly affect Arizona's residential solar market, one of the largest in the nation.
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TEP general rate case adjudication: Tucson Electric Power's pending rate case (filed 2024) involves disputed cost-of-service allocations, coal asset decommissioning cost recovery, capital structure arguments, and rate design for low-income customers; ACC staff and intervenors have filed competing revenue requirement recommendations.
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Electric vehicle infrastructure and transportation electrification: ACC is considering IOU applications for make-ready EV charging programs and utility-owned charging infrastructure, including cost recovery frameworks and whether ratepayer funding of public charging is appropriate under Arizona law; proceedings involve APS and TEP proposals.
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ACC governance and commissioner conduct: Following years of political controversy, including past campaign finance investigations and ideological splits over clean energy standards, the ACC faces ongoing stakeholder pressure to adopt formal ethics rules, ex parte communication reforms, and transparent docket management practices that affect proceeding integrity.
Upcoming
Estimated ACC open meeting with anticipated vote on TEP general rate case final order; ACC commissioners expected to consider staff recommended revenue requirement and contested rate design provisions including residential solar export rates and low-income assistance program funding (date estimated based on procedural schedule).
Estimated deadline for IOU integrated resource plan filings under ACC's revised IRP rules; APS, TEP, and UniSource expected to submit updated 15-year resource plans reflecting new dispatchable capacity and storage procurement requirements adopted in 2025 rulemaking (date estimated).
Estimated ACC hearing on proposed amendments to net metering successor tariff rules (Docket RE-00000C-XX-XXXX series); ACC administrative law judge expected to convene evidentiary hearings on value-of-solar export rate methodology and fixed-charge proposals affecting residential distributed generation customers statewide (date estimated).
Arizona general election day; two ACC commissioner seats anticipated on the 2026 ballot, with outcomes potentially reshaping the commission's ideological balance on clean energy mandates, rate design philosophy, and utility oversight posture for the subsequent four-year term.
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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