people don't realize how much water they actually use. its not just showers, it washing machines, dishwashers, irrigation, car washing, etc. i am not a heavy water user, but my wife and i still average almost 70gpd/person per day. hard to believe, but its true. 400gpd/day for 2 people? somethings wrong/up!! i think the neighbor is watering their garden as well as washing their pets! at your expense!!