Arizona manages Colorado River supply cuts through water diversification

Arizona is addressing long-term water challenges following federal cuts to its Colorado River allocation, which are projected to reduce supply by 27 percent annually through 2028. Despite these reductions, utility providers and experts suggest that immediate water shortages for residents are unlikely due to proactive management and diversified supply portfolios.

Utility companies like EPCOR are mitigating risks by utilizing groundwater, reclaimed water, and stored resources. For instance, EPCOR’s reliance on the Central Arizona Project accounts for only 19 percent of its total portfolio. Providers are also modeling extreme shortage scenarios, ranging from 10 to 70 percent, to ensure system reliability.

At a recent water-outlook conference, experts noted that while Arizona faces significant challenges, the state is not in an immediate emergency comparable to previous crises in California. This stability is attributed to years of stored water in underground aquifers. Moving forward, key issues will include conservation, agricultural efficiency, and the impact of climate change on the Colorado River. Additionally, the Arizona Department of Water Resources requires new developments to demonstrate a 100-year assured water supply to ensure long-term viability.