stylistic:style_transfer
Water purity and availability

In 1815, Philadelphia began sourcing its water via the Fairmount Water Works on the Schuylkill River, the nation's first major urban water supply system. In 1909, the Water Works was decommissioned as the city transitioned to modern sand filtration methods. Philadelphia Water Department (PWD) provides drinking water, wastewater collection, and stormwater services for Philadelphia, as well as surrounding counties. PWD draws about 57 percent of its drinking water from the Delaware River and the balance from the Schuylkill River. The city has two filtration plants on the Schuylkill River and one on the Delaware River. The three plants can treat up to 546 million gallons of water per day, while the total storage capacity of the combined plant and distribution system exceeds one billion gallons. The wastewater system consists of three water pollution control plants, 21 pumping stations, and about 3,657 miles (5,885 km) of sewers.