Pima County's Data Center Ban Creates a Test Case for Local Authority
Pima County commissioners voted to impose a ban on new data center development. The decision arrived without a sunset clause, without a public demand to justify it, and without any evidence that county residents asked their elected officials to forbid private companies from building data facilities on private land.
The Goldwater Institute filed suit in state court. The organization argues that the ban violates Arizona's preemption doctrine—the principle that certain powers belong to the state, not to individual counties. This is a clean legal question. Either Pima County has the authority to forbid a category of private development on private property, or it does not.
That question matters more than it sounds. Every county in Arizona possesses broad land-use authority. Counties zone. Counties issue permits. Counties enforce building codes. But that authority has limits. A county cannot ban an entire category of lawful private activity simply because it prefers not to have it. That would be an exercise of legislative power that exceeds the county's constitutional charter.
What the Ban Actually Does
Pima County's data center ban prevents private developers from constructing facilities to house servers, networking equipment, and computing infrastructure. Data centers are among the cleanest industrial operations available. They generate minimal pollution. They require no raw materials. They employ skilled workers and pay property taxes. They operate silently, twenty-four hours a day, in climate-controlled buildings.
No resident complained about noise. No environmental group presented evidence of contamination. No public health officer testified that data centers posed a threat. The county simply decided it did not want them and wrote an ordinance.
The practical effect is to prevent a private industry from locating in Pima County regardless of whether any individual county resident or business owner objected. A property owner who might have leased land to a data center operator cannot. A company seeking to build such a facility must go to another county, another state. Pima County has used its zoning authority to exclude an entire economic category.
The Preemption Argument
Arizona law establishes a hierarchy of regulatory authority. The state retains control over matters of statewide concern. Counties exercise delegated power over local land use. The line between those categories is not always clear, but it exists. The question in this case is whether data center regulation falls on the state side or the county side.
The Goldwater Institute contends that Arizona's Commerce Clause and property rights protections prevent counties from banning categories of lawful private economic activity without a compelling state interest. A preference not to have a particular industry does not qualify. Neither does speculation about future impacts without current evidence of harm.
If a county can ban data centers, it can ban cryptocurrency mining, or warehouses, or light manufacturing, or any other lawful business the county commission decides it finds objectionable. At that point, county land-use power becomes arbitrary. It becomes a tool for preventing economic development rather than regulating it.
The Timing and the Politics
Pima County's ban arrived during a period of national scrutiny of large data center development. Tech companies and cryptocurrency operations have sited major facilities in Arizona, particularly in rural counties where land and power are available and regulatory environments are stable. Arizona has attracted significant data center investment because the state has not attempted to exclude the industry through categorical bans.
Pima County's action stands apart from reasonable land-use regulation. The county could have required setbacks, environmental review, or traffic mitigation. Instead, it simply said no. That is the kind of blanket prohibition that courts typically scrutinize closely, particularly when applied to a lawful private activity on private land.
What Happens Next
The case will turn on Arizona's preemption doctrine and the scope of county land-use authority. The outcome will matter beyond data centers. If Pima County can categorically ban a lawful industry, every county in Arizona now knows it can do the same. Agricultural counties might ban mining. Urban counties might ban agriculture-related facilities. The power to zone becomes the power to exclude, and land-use regulation becomes industrial policy by ordinance.
Conservative legal principle holds that government power should remain transparent, accountable, and bounded by law. A county commission voting to exclude an entire industry from its borders is none of those things. It is not transparent—no public process required it. It is not accountable—no election turns on data center policy. It is not bounded by law—the statute granted the county zoning power, not the power to exclude categories of lawful commerce.
Watch the court filings in this case. The Goldwater Institute's complaint will explain the specific preemption arguments. Pima County's response will reveal what justification it offers. The depositions will show whether any county official can articulate a reason for the ban beyond "we do not want it."
Mark March 2024 on your calendar. If you live in a county where economic development matters to your property tax base or your neighbor's paycheck, this lawsuit is worth following.
