Washougal Water Hardness & Quality Report (2026)

The City of Washougal Water Utility supplies roughly 17,000 residents in Washougal, Clark County, Washington, near the Columbia River Gorge. Its main water source is the Washougal River, with an intake situated centrally in the city. After conventional filtration and disinfection at the local treatment facility, the water is distributed to homes and businesses. There are no reported reservoirs or groundwater wells contributing to the primary supply. The Washougal River watershed, covering 700 square miles in the Cascade foothills, receives its water from rainfall and snowmelt originating in volcanic highlands.

The watershed's geology is characterized by the Columbia River Basalt Group from the Miocene epoch and unconsolidated glacial outwash. Crucially, the area lacks significant carbonate rock formations like limestone or dolomite. This geological makeup results in naturally soft water, which contains low levels of dissolved solids. While volcanic minerals contribute a trace amount of hardness, the overall mineral content remains minimal. This is largely due to the short duration of water contact with formations that are low in calcium.

Because the water is naturally soft, homeowners typically won't encounter significant scale buildup in their pipes, water heaters, or appliances. This can lead to reduced energy waste and less frequent maintenance. You'll find that soap lathers easily, and staining on bathroom fixtures is uncommon. A water softener isn't necessary or recommended for this supply; any benefits would be negligible. If river particulates become an issue, installing sediment filters would be a more practical solution. The water quality has been rated excellent, with zero violations reported, and all tested contaminants remain below national averages.