On average, each Californian used 85 gallons of water at their homes every day in 2016. By national standards, that’s right about in the middle. In Idaho, each person on average uses 168 gallons a day, the national high. Residents of Maine use the least, about 55 gallons.
Coastal city dwellers, especially in the cooler, rainier north part of the state, use the least water, while residents of inland suburban areas with spacious lawns, gardens and pools use much more.
In one water district in north San Diego County, each resident uses more than 500 gallons per day during the hottest summer months.