 The city of Arlington provides water and water treatment to approximately 5,548 customers within a service area within the city limits and some surrounding areas.The city's water is sourced from groundwater deposits near Haller Park on the Stillaguamish River and near Arlington Municipal Airport, as well as water purchased from the Snohomish County PUD that is sourced from Spada Lake.The Smokey Point neighborhood is served by the City of Marysville's water system.