The combination of industrial growth, population growth and rising incomes has led to an increased demand for water. Demand is estimated to be growing 20 percent a year, but the investment program of the Provincial Waterworks Authority (PWA) has increased supplies about 12 percent a year. The PWA has the capacity to serve about 60 percent of the 10 million people living in the 220 cities and towns under its jurisdiction with about 1.2 million cubic meters a day.