Parkway Water Hardness & Quality Report (2026)

The Parkway water system, operated by California Water Service Company as the CALAM - PARKWAY district, serves residents in the Parkway area of Sacramento County, California. This suburban community near Sacramento receives its water from a mix of local groundwater wells and imported surface water. The local supply taps into regional aquifers, while the imported portion comes via the State Water Project from the Sacramento River watershed. Cal Water treats the water at its own facilities, employing disinfection and basic conditioning before distributing it to several thousand customers. The Sacramento River watershed itself is vast, covering the northern Sierra Nevada and Central Valley basins.

Locally, the groundwater interacts with alluvial deposits and sedimentary rock formations from the Tertiary period, including sandstones and shales. These formations, particularly limestone-dolomite sequences and evaporitic sediments found within the Great Valley Sequence, naturally mineralize the water. Prolonged contact with these geological materials dissolves minerals, resulting in a hard water profile. The region's tectonically active geology and the nature of these sedimentary basins mean that imported sources, often influenced by Sierra Nevada granitic outcrops and Central Valley alluvium, can also contribute dissolved solids that reinforce this mineralized character.

At the hard level this water reaches, mineral scaling can significantly impact the efficiency and lifespan of appliances like water heaters, dishwashers, and washing machines, potentially leading to higher energy bills and frequent repairs. You might also notice diminished soap lathering, requiring more detergent for cleaning, and persistent spotting on glassware and fixtures. To combat this buildup, homeowners often find regular maintenance, such as vinegar descaling, beneficial. Many residents in Parkway also choose to install a water softener to extend appliance life and improve overall cleaning performance. Cal Water reports indicate compliance with federal and state standards for pH, and nitrate levels are monitored closely, typically remaining at low parts per million in comparable systems.