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Yuma County, AZ — Solar Development Risk Assessment

Local solar ordinance barriers, board sentiment, and utility policies that affect development timelines and risk.

41.6
Risk Grade
Good
Highest solar irradiance in AZ (7+ kWh/m²/day); long-established utility-scale solar market; pro-development board; primary risk is water constraints from Colorado River compact and ADWR groundwater rules limiting large O&M water use.
Assessment Snapshot
Population
213,787
State Rank
#4
Compliance
37%
Trajectory
32

Moratorium Status

✓ No Active Moratorium
No Moratorium

Ordinance & Regulations

Setback Requirements
Yuma County ZO: standard Agricultural zone setbacks (100–150 ft from property lines). No unusually restrictive solar-specific setbacks.
Zoning Mechanism
CUP via Yuma County Planning & Zoning Commission and Board of Supervisors. Generally efficient process; board is pro-economic development. Military (MCAS Yuma, Yuma Proving Ground) buffer zones affect some parcels in northern and western county.
Acreage Caps
None codified; practical limits from military airspace and Colorado River water constraints.
Density Caps
None codified.
Spacing Rules
None codified.
Size Restrictions
No county restriction; military airspace and ADWR water rights are practical constraints.

Board Sentiment & Political Risk

Sentiment Analysis
Very supportive for solar; Yuma County board is pro-economic development; county has long history of utility-scale solar; highest irradiance drives strong economics; agricultural community accustomed to large industrial land uses.
Basis for Assessment
Yuma County Board of Supervisors are conservative Republicans but strongly pro-economic development; Agua Caliente Solar (290 MW, one of largest in US at time of construction) established county as major solar hub; APS active buyer; Colorado River water constraints are the main caution.
Political Risk Factors
Stable
Board Members
Yuma County Board of Supervisors: Tony Reyes (Chairman, District 1) | R | 2026; Jonathan Lines (District 2) | R | 2026; Russell McCloud (District 3) | R | 2026; Mike Kurokawa (District 4) | R | 2026; Marco Lopez Jr. (District 5) | D | 2026.

Grid, Utilities & State Context

Grid Operator
Arizona Public Service (APS) / Western Interconnection (WECC)
Utilities
Arizona Public Service (APS) — Pinnacle West Capital, None significant (APS dominant throughout county)
State Permitting Process
Yuma County CUP via Planning & Zoning Commission and Board of Supervisors — one of the most efficient processes in AZ. Arizona One-Stop Shop. MCAS Yuma and YPG military liaison for buffer zones. ADWR water rights permit (critical groundwater area designation near Wellton-Mohawk). FAA coordination. International boundary (US/Mexico) CBP coordination for southern Yuma County projects.
State Incentives
No binding Arizona RPS. APS renewable commitment (45% renewable by 2025). Federal ITC/PVTC. Arizona property and sales tax exemptions. Qualifying Facility PURPA rates. Enterprise Zone incentives. Colorado River Indian Tribes (CRIT) proximity offers tribal energy partnership options.

Development Activity

Active/Completed Projects
Agua Caliente Solar (NextEra/APS) | 290 MW | Operational (one of largest in US at time) Yuma Solar (APS, various) | Multiple projects totaling 200+ MW | Operational/Pipeline Orion Solar (private) | ~100 MW | CUP approved | Pipeline
Denied/Withdrawn Projects
Very few denials; board is accommodating; military buffer zones occasionally preclude specific sites.

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Last verified: 2026-03-24 | SolarRisk Tracker | Data sources: Government records, utility filings, public meeting minutes