Woodland Water Hardness & Quality Report (2026)

The City of Woodland Water Utility, operated by the City of Woodland Public Works Department, serves approximately 60,978 residents in Woodland, Yolo County, California and the surrounding Sacramento Valley service area. The primary drinking water source is treated surface water drawn from the Sacramento River, completing a transition from the city's historical reliance on groundwater. Water is processed at the city's treatment facility, which employs conventional treatment — coagulation, sedimentation, filtration, and disinfection — to meet state and federal drinking water standards.

The Sacramento River watershed spans over 27,000 square miles, originating in the Klamath Mountains and flowing through the agriculturally intensive Central Valley. Key geological features include Quaternary alluvial sediments and Tertiary sedimentary rocks of the Great Valley Sequence, with influences from Franciscan Complex bedrock and Sierra Nevada plutonics. Limestone and evaporite-bearing formations in tributary drainages contribute dissolved calcium and magnesium, yielding a soft, moderately mineralised supply shaped by Pleistocene and Holocene alluvial deposits.

At soft levels (56 mg/L), the water poses low scaling risk — pipes, water heaters, and dishwashers see minimal limescale accumulation and soap lathers readily. Routine annual heater flushes and occasional vinegar descaling of kettles and coffee makers are sufficient; no softener is necessary. Water quality earns an 'A' compliance grade; some third-party analyses note 5 contaminants such as chromium-6 and uranium above health guidelines but within legal limits; pH is typically neutral to slightly alkaline; lead and copper rules show no exceedances.