Forty percent only accounts for 10% Percentage-wise "Water Use in California" http://www.ppic.org/main/publication_show.asp?i=1108 California alone Percentage-wise California alone http://www.ppic.org/main/publication_show.asp?i=1108 long-term water conservation Percentage-wise Water Use in California 178 gallons per person per day only accounts for 10% long-term water conservation California alone