I live in the southwest US, water saving measures for households are basically as good as they can get without asking people to stop bathing every day. And really it’s not household use (even wasteful household use) here that threatens aquifers, it’s relentless pumping of ground water and overuse of river water for agriculture. In California in particular this is tied up with water rights that allow farmers to use excessive amounts of water with minimal or no cost associated with it. Not all of what’s grown is even a food product either, ex alfalfa.
Obviously we need farms and food, but we have to modernize how plants are watered to minimize water loss. Drip irrigation is much more effective, but since it costs more money than just flooding a ditch many farmers don’t bother.