Arizona, a growing hub for American semiconductor manufacturing, is facing a sharp cut in the water it draws from the Colorado River, following a federal decision on how to manage the river's dwindling flow. This matters because the state has become central to the push to revive domestic chip production, with TSMC and Intel building and expanding water-intensive factories there even as decades of drought and overuse leave less water to go round. City planners and industry are already moving to conserve supplies and find alternatives, but the shift is expected to raise costs for both manufacturers and residents and stir tension over who pays for new infrastructure.

The Colorado River supplies more than a third of Arizona's water, and the state is set to lose over a quarter of its usual annual allocation. Agriculture still consumes over 70% of Arizona's water against just 6% for industry, but chip fabs' "ultra-pure" water needs are growing fast: a typical facility can require up to 16 million gallons of municipal water daily. Intel's Chandler facilities drew more than 2.7 billion gallons of freshwater in 2025, while TSMC's first Arizona fab uses about 4.75 million gallons a day, equivalent to roughly 14,000 homes; TSMC currently recycles 65% of its water, aiming for 90% once a reclamation plant is complete. Both firms have received billions of dollars in CHIPS Act funding to expand production.