Arizona’s groundwater supply is disappearing fast. Satellite data from NASA and analysis by ASU researchers paints a stark picture of accelerating groundwater depletion across the Colorado River Basin, especially in Arizona.
Key Takeaways:
- Massive Groundwater Loss: The basin lost 27.8 million acre-feet of groundwater between 2002 and 2024, equivalent to the entire storage capacity of Lake Mead.
- Arizona Hit Hardest: 68% of that loss occurred in Arizona, with Cochise, La Paz, and Mohave counties seeing the worst impacts.
- Accelerating Decline: The rate of groundwater loss more than doubled from 5mm/year (2002–2014) to 12mm/year (2015–2024).
- Primary Drivers:
- Industrial-scale alfalfa, cotton, and pecan farming using outdated flood irrigation.
- Drought-driven shifts from El Niño to La Niña, reducing Southwest precipitation.
- Agriculture Dominates Water Use: 72% of Arizona’s water goes to agriculture; cities use just 22%.
Implications for Landlords & Investors:
- Risk of Regulation: Groundwater depletion could trigger stricter irrigation restrictions and well drilling limitations, particularly in Pinal and Cochise counties.
- Shift to Urban Density: Development may concentrate in areas with managed groundwater systems (like AMAs), boosting value in urban cores.
- Legal Exposure: Water rights and well disclosures may become hot-button issues in rural and exurban real estate deals.
Now is the time for real estate investors to pay attention to groundwater data and rethink where and how to build or buy.