How much water does the average American family of four use?

The average American family of four uses 400 gallons of water per day.  On average, approximately 70% of that water is used indoors, with the bathroom being the largest consumer (a toilet alone can use 27%). 

This information is provided by the US EPA:  www.epa.gov/watersense/pubs/indoor.html

 

 

 

-A A +A