This study addresses complementary treatment systems' economic feasibility and environmental benefits to reduce pharmaceutical micropollutants in urban water supplies in Curitiba, Brazil. The research evaluated powdered activated carbon (PAC) dosing systems in drinking water treatment plants (DWTPs), analyzing implementation and operational costs in relation to the environmental benefits represented by the shadow price of removed pharmaceutical micropollutants. The results indicate that while technically viable, the high cost of PAC systems renders the project economically unfeasible, with a removal cost of US .3941 per mg/L of micropollutant, far exceeding the estimated environmental benefit of US .4134 per mg/L. Over a 30-year horizon, the cost per m