West Springfield Water Hardness & Quality Report (2026)

West Springfield, Virginia, in Fairfax County — a large unincorporated community in the Springfield-Burke corridor of the Northern Virginia suburbs, one of Fairfax County's most populous residential neighborhoods along Rolling Road and the Franconia-Springfield Parkway near the Beltway — receives its municipal water from Fairfax Water, the largest water utility in Virginia, which draws from the Occoquan Reservoir (Occoquan Creek and Bull Run tributaries) and the Potomac River through the Griffith and Corbalis Water Treatment Plants. Fairfax Water blends Occoquan and Potomac supply based on seasonal availability and quality.

The moderately hard 168.5 mg/L hardness and TDS of 402 mg/L reflect the blended Fairfax Water supply character. The Occoquan Reservoir watershed drains the Northern Virginia Piedmont — Triassic Culpeper Basin sedimentary rocks (sandstone, mudstone, diabase), Precambrian metamorphic and crystalline Piedmont basement, and Silurian-Devonian metasedimentary formations — a geologically diverse terrain with moderate dissolved mineral content. The Potomac River at the Great Falls intake drains the Blue Ridge Province (crystalline granite and gneiss) and Valley and Ridge carbonate contributions from the Shenandoah Valley, producing harder, more mineralized water than the Occoquan alone. Blending these two sources delivers a consistently moderately hard supply to West Springfield.

At 168.5 mg/L, West Springfield's water is moderately hard — the standard Northern Virginia Fairfax Water supply. Scale builds in kettles and coffee machines over months, dishwashers benefit from rinse aid, and bathroom fixtures develop calcium deposits. Quarterly descaling of heating appliances is the appropriate schedule. The elevated PFAS level of 8.7 ppt warrants a certified drinking water filter — Northern Virginia's dense federal military and defense contractor presence (Joint Base Myer-Henderson Hall, Marine Corps facilities, defense contractors throughout Fairfax County), combined with the Occoquan watershed's suburban runoff and the Potomac's upstream agricultural and municipal sources, contribute to the elevated Northern Virginia PFAS baseline.