West Falls Church Water Hardness & Quality Report (2026)

West Falls Church, Virginia, in Fairfax County — a major northern Virginia Washington DC suburban community (West Falls Church is a significant Fairfax County unincorporated community — a northern Virginia suburb in the Beltway inner ring adjacent to Falls Church city and McLean; West Falls Church is centered on the West Falls Church WMATA Metro station (a Washington Metro Orange and Silver Line terminus — one of the most important suburban Washington DC Metro stations for bus/rail connections to the Merrifield–Dunn Loring corridor and Tysons Corner)); West Falls Church is a diverse Fairfax County community with a significant Vietnamese-American, Korean-American, and diverse federal government professional population (the West Falls Church–Seven Corners corridor has one of the most significant Vietnamese-American commercial and residential communities in the Northern Virginia metro area), adjacent to Falls Church and Merrifield in the inner Beltway northern Virginia corridor — draws its municipal water supply via Fairfax Water. Water hardness in West Falls Church measures 126.5 mg/L — classified as moderately hard.

West Falls Church's moderate hardness reflects the northern Virginia Fairfax Water Potomac supply's calcareous-moderate character with effective treatment. The Fairfax Water distributes Potomac River and Occoquan Reservoir supply to the inner Beltway West Falls Church zone, producing the moderate 126.5 mg/L.

At 126.5 mg/L, West Falls Church residents encounter moderate scale accumulation. Monthly cleaning is recommended. Fairfax Water consistently delivers water meeting all Virginia DEQ and EPA Safe Drinking Water Act requirements.