Everett Water Hardness & Quality Report (2026)

The City of Everett Public Works Department manages the water utility, serving over 75% of Snohomish County residents east of Puget Sound. Water is sourced exclusively from Spada Reservoir, which holds 50 billion gallons and is supplied by the Sultan River via the Jackson Project. From the reservoir, water flows through a pipeline to Chaplain Reservoir for storage before distribution to the service area. No groundwater or wells are used; treatment occurs at facilities processing this surface water before delivery.

The Sultan River Watershed spans the forested North Cascades, with headwaters in the glaciated peaks of the Henry M. Jackson Wilderness. The underlying geology consists of granodiorite batholiths and Quaternary glacial tills, lacking extensive carbonate or evaporite formations. This granitic and volcanic terrain, formed during the Tertiary and Quaternary periods, yields very soft water with low dissolved minerals, shaped by rapid snowmelt and the short rock-water contact times characteristic of steep, high-elevation terrain.

Very soft water minimizes scale buildup on pipes, fixtures, and appliances including water heaters and dishwashers, reducing maintenance needs and extending equipment life. Soap lathers easily without excess residue, avoiding dry skin or spotting. No water softener is needed or recommended, as the supply lacks hardness-related issues. Everett tests for over 100 contaminants annually, meeting all EPA standards; treatment includes coagulation, filtration, chloramine disinfection, and corrosion control. No PFAS, lead, or copper violations have been noted, and Spada Reservoir's pristine watershed supports excellent raw water quality throughout the year.