Seven Basin States

A look at the Colorado River Basin reservoir system storage numbers

A comprehensive inventory of Colorado River Basin reservoirs across 7 states reveals current storage levels, capacities, and managing agencies—Lake Mead to McPhee.

Western-Water is for laypeople who are interested in general water news and their water rights. Managed by a water paralegal with over 30 years' experience in Arizona water issues, you'll find calculators, tips and general information geared for water users in the Colorado River states. Do not rely on this site for legal advice. The picture was taken while hiking at Aravaipa Canyon, a must see!

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Helen c on Lake Mead sinks to record low amid basin droughtAugust 18, 2026
This is ominous. There's some small reason to hope, if the weather cooperates but we need to get cracking.
Helen c on Water tops Arizona voters’ worries, new poll showsAugust 18, 2026
An informed and involved citizenry is required to hold those in positions of authority to account. We have to be…
Helen c on EPA tool helps states spot water problems earlyAugust 18, 2026
This is certainly a step in the right direction. Preemptive action is a great start.
Helen c on Banking water underground for the next droughtAugust 12, 2026
The official conclusion that banking water can help but is not a complete solution seems....obvious. But better something than nothing.…
Helen c on Climate change made 2026 snow drought 4x more likelyAugust 12, 2026
For 46 years since I've lived here, our mountains have had large snow caps all year round. The past couple…