The Arthur Rollins Water Treatment Facility was originally constructed in 1935. The raw water is supplied to the treatment plant from an impoundment located on the Oyster River. The impoundment retains approximately 9 million gallons of river water from a total drainage area of 16.5 square miles. In the treatment process chemicals are added to remove impurities through settling. The water is then filtered through layers of anthracite coal and sand. The final stage of treatment involves the addition chlorine for disinfection, fluoride to minimize tooth decay , and sodium hydroxide to minimize corrosion in the distribution system. The maximum capacity of the ARWTP is about 1.55 million gallons per day.