Water could become a whole lot more expensive — but safer — to drink for many residents. Last fall, Broward County hired a consultant to see what changes it can make to the water-treatment process to cut down on the volume of toxic chemicals known as PFAS in the drinking water. Toxic PFAS, or perfluoroalkyl and polyfluoroalkyl substances, can be widespread and long lasting in the environment. That county report, likely to be finished within a “couple months,” is expected to show a “hefty dollar amount” to replace the water plants, said County Administrator Monica Cepero.