Protecting Phoenix area cities’ ability to provide assured, safe, and sustainable water supplies to their communities.

Warren Tenney

AMWUA Blog

Warren Tenney

Executive Director

Accounting for evaporation and system losses needs to be part of managing the Colorado River

As Lake Mead and Lake Powell’s elevations continue to descend towards unprecedented low levels, the US Bureau of Reclamation has signaled it is considering more than one initiative to stabilize the Colorado River system. One of those actions is accounting for evaporation and other system losses, which would be a common-sense step in managing the River.  Evaporation occurs primarily at Lake Mead, Lake Havasu, and Lake Mohave – the largest reservoirs in the Colorado River... Read More>

Keeping Current

Where We Stand

Colorado River Structural Imbalance

Levels at Lake Mead are rapidly dropping, in part, because the water stored in this reservoir is over-allocated to the states that share it. This puts the stability of the Colorado River system and reliability of Arizona’s Colorado River supplies at serious risk.

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Conservation & Efficiency

Living in a desert, Arizonans recognize that water is a limited and precious resource. We know we need to conserve and protect the water we have, stretching and preserving it for the future. We have embraced a culture of conservation, and it’s paying off. That ongoing commitment will help us weather the impacts of climate change, extended drought, and shortage.

Drought & Shortage

Extended drought and a shortage on the Colorado River in 2022 are cause for concern, but they are not unexpected. Arizona has been visionary in water management planning and policy. The AMWUA cities have prepared and invested to ensure reliable, sustainable supplies for their communities. Continued innovative water management strategies, investment, and forward-thinking policy will enable us to meet the very real challenges ahead.
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AMWUA (pronounced "am-wa" as in, "I am" and "water") is the Arizona Municipal Water Users Association, a non-profit association of ten municipalities in the Phoenix metro area, advocating responsible water stewardship that supports economic prosperity and safeguards Arizona's water supplies for future generations.