Informative article. On an individual level, there are some things the average person can do: reduce meat consumption, replace turf with native or drought tolerant plants, capture rain water, etc.

However, several orders of magnitude more water used is for agriculture where there are clear inefficiencies, e.g. growing alfalfa in the desert that gets shipped overseas for livestock feed or irrigating with sprayers during the day. We also should reevaluate the viability of maintaining things like golf courses in Arizona before needing to ration water in those places.