In Napa Valley, California, American Canyon city officials are discussing a new water-efficiency policy that no other municipality in California has yet embraced: no front lawns for new homes.

Known as ‘zero turf,’ the ordinance would mandate to developers that all proposed neighborhoods come with lot designs that omit grass in front of homes. The restriction would still allow the planting of lawns in backyards.

American Canyon is the only city in Napa without its own reservoir. It is confronted with a long-term and challenging problem of providing enough water for its homes and businesses—buying water from other sources as well as restricting irrigation.