Question

A town requiring 2.0 m³/s of drinking water has two sources, a local well with 15 g/m³ nitrate (as N) and a distant reservoir with 5 g/m³ nitrate (as N). What flow rates of well and reservoir water are needed to meet the EPA drinking water standard [maximum contaminant level (MCL)] for nitrate and minimize the use of more expensive reservoir water?

Answer 1