Sherwood Water Hardness & Quality Report (2026)

The City of Sherwood, Oregon, is served by the Sherwood Water Utility, which provides drinking water to residents in Yamhill County in the Portland metropolitan area. The utility draws from both surface and groundwater sources typical of the Willamette Valley region, treating its supply at local facilities to ensure full compliance with all federal and state drinking water standards. The service area encompasses the city proper and surrounding communities. Annual Consumer Confidence Reports are published detailing treatment processes, source water protection, and compliance with EPA regulations.

Sherwood's water supply originates from the Willamette Valley watershed, underlain by Quaternary alluvial deposits and Tertiary volcanic formations including basaltic and andesitic rocks from the Cascade Range. The valley's geology is characterized by relatively young, porous volcanic materials that allow water infiltration and moderate mineral dissolution. This geological setting, combined with the region's high rainfall and western Oregon's maritime climate influence, results in water with soft to moderately mineralized character — typical of Willamette Valley water chemistry.

Sherwood's water is classified as soft, meaning residents experience minimal scaling on fixtures and appliances, good soap lather, and no need for water softening treatment. Water heaters and dishwashers experience minimal mineral buildup, and most residents do not require a water softener. Routine plumbing and appliance maintenance is straightforward, with no special mineral-related interventions typically necessary. The City of Sherwood consistently delivers water meeting or surpassing all federal and state standards, including compliance with EPA regulations for lead, copper, and other regulated substances.