The per-capita water usage is 80 to 100 gallons per day in the United States. The activities that use the most water are flushing the toilet and taking showers and baths.
A typical bathtub takes 36 gallons to fill while showers usually use 2 to 2.5 gallons per minute for newer shower heads and 4 gallons per minute for older heads. Face washing, hands washing and shaving use about a gallon of water each. Most bathroom faucets use 1 to 2 gallons of water per minute, but teeth brushing uses under a gallon of water if the faucet is turned off. Newer toilets use between 1.2 and 1.6 gallons per flush with older toilets using about 3 gallons per flush. Dishwashers use about 20 gallons of water per load, while clothes washers use 25 gallons per load in newer models and 45 gallons per load in older models.