Lake Stevens Water Hardness & Quality Report (2026)

Lake Stevens, Washington, in Snohomish County — a major north Seattle suburban community (Lake Stevens is a significant Snohomish County city — one of the fastest-growing cities in Washington State, a north Seattle exurban community built around Lake Stevens (a large natural lake in the Cascade foothills); Lake Stevens has grown dramatically with families moving north from the inner Seattle suburbs seeking more space and lower housing costs), a diverse Snohomish County community with a primarily working-class and middle-class suburban family population, adjacent to Snohomish and Marysville in the north King/Snohomish County corridor, home of significant new residential development in the Cascade foothills, and a community with excellent water recreation access on Lake Stevens — draws its municipal water supply via the Snohomish County PUD. Water hardness in Lake Stevens measures 24 mg/L — classified as very soft.

Lake Stevens's very soft supply reflects the Snohomish County Cascade Mountains watershed's calcareous-poor crystalline geology. The north Seattle Cascade foothills watershed drains the Precambrian Cascade granite and metamorphic (calcareous-poor). Snohomish County PUD produces the very soft 24 mg/L.

With hardness at 24 mg/L, Lake Stevens residents enjoy very soft water. Snohomish County PUD consistently delivers water meeting all Washington DOE and EPA Safe Drinking Water Act requirements.