1-2. Estimate the per capita daily water withdrawal for public supply in the United States in 2005 (in Lpcd). Use the following population data (McGeveran, 2002) and water supply data (Kenny et al., 2009): Year Population 1950 151,325,798 1960 179,323,175 1970 203,302,031 1980 226,542,203 1990 248,709,873 2000 281,421,906 Public supply withdrawal, m³/d 5.30 × 107 7.95 X 107 1.02 × 108 1.29 × 108 1.46 × 108 1.64 × 108

Fig: 1