To amend the Colorado River Basin Project Act to provide for the equitable distribution of Colorado River water for the lower basin States, and for other purposes.

HR 7078 amends the Colorado River Basin Project Act to change how water is shared during shortages among Arizona, California, and Nevada - the lower basin states. It requires that during a shortage, all water diversions for these states must be reduced by the same percentage based on their current annual allocations, without favoring historical water rights. This ensures proportional cuts regardless of a state's existing water claims, aiming for a more balanced approach to scarcity. The bill directly affects water management for these three states and their ongoing Colorado River usage.