Fairfax Water is Virginia’s largest water utility and one of the 25 largest water utilities in the country, serving one out of every five Virginians who obtain their water from public utilities. Nearly two million people in the Northern Virginia communities of Fairfax, Loudoun, Prince William, Fort Belvoir, Herndon, Dulles, Vienna, Alexandria, Falls Church, and Fairfax City depend on Fairfax Water for superior drinking water.
Fairfax Water provides water that is treated at four different locations. Fairfax Water owns and operates the two largest water treatment facilities in Virginia with an average daily water production of 163 million gallons and combined maximum capacity of 376 million gallons per day. The James J. Corbalis Jr. treatment plant is at the northern tip of Fairfax County and the Frederick P. Griffith Jr. treatment plant is on the southern border of Fairfax County.
Fairfax Water also purchases water from the McMillan and Dalecarlia treatment plants in Washington DC. They are part of the Washington Aqueduct, owned and operated by the U.S. Army Corps of Engineers.
Fairfax Water draws raw water from two primary sources: the Potomac River and the Occoquan Reservoir, which is fed by the Occoquan River. The four treatment facilities feed an interconnected distribution system that includes 3,995 miles of water mains and 29,069 fire hydrants.