Hazel Dell Water Hardness & Quality Report (2026)

Hazel Dell, an unincorporated community in Clark County, Washington, receives its drinking water from Clark Public Utilities (CPU), the primary water utility serving the area north of Vancouver. CPU sources water from a mix of surface water from the Columbia River and groundwater wells tapping local aquifers. Key facilities include the Lake River Treatment Plant for surface water processing and multiple wellfields for groundwater, with distribution to over 200,000 residents in the greater Vancouver area. For detailed reports, contact CPU at 360-992-3000 or visit their water quality reports page.

The watershed encompasses the lower Columbia River Basin, with inflows from the Cascade Mountains and local tributaries like Lake River. Geology features basalt bedrock from Miocene flood basalts of the Columbia River Basalt Group overlain by Quaternary glacial and alluvial sediments, including the Troutdale Formation sands and gravels. Groundwater is extracted from unconfined aquifers in these deposits; the mineral-rich basalts and sedimentary layers impart a moderately mineralised character to the supply, with Columbia River surface water dilution moderating the overall chemistry.

At moderately hard levels, Hazel Dell's supply causes moderate scale buildup in water heaters, dishwashers, and washing machines, increasing energy costs and reducing appliance lifespan by 20–30%. Faucet aerators and showerheads may clog, leading to reduced flow; installing sediment pre-filters, flushing water heaters annually, and cleaning fixtures with vinegar are recommended. A water softener is advised for households experiencing spotting or dry skin. CPU conducts over 100 substance tests yearly; recent Consumer Confidence Reports note stable pH around 7.5–8.5, no lead exceedances, and treatment via coagulation, filtration, UV disinfection, and chloramination.