Buena Park Water Hardness & Quality Report (2026)

Buena Park's drinking water is supplied by City of Buena Park Water Services, serving approximately 84,000 residents in north Orange County, California. The utility blends 70% groundwater pumped from the local aquifer beneath north Orange County with 30% imported water from the Colorado River Aqueduct (originating in the Rocky Mountains) and the California State Water Project Aqueduct (sourced from the Sierra Nevada). Groundwater is managed with annual pumping allocations and artificial recharge, including daily injections of 100 million gallons of high-quality recycled water.

Water enters the system via the Santa Ana River watershed, which recharges the Orange County Groundwater Basin through natural percolation, stormwater runoff, and treated wastewater discharges. The basin's geology features Quaternary unconsolidated alluvial sediments — sands, gravels, silts, and clays — overlying older Pleistocene deposits, with limestone, dolomite, and calcareous materials that dissolve calcium and magnesium into groundwater. Imported aqueduct waters carry lower initial mineralization but blend with the more mineralized local groundwater, yielding a hard overall supply.

At moderately hard to hard levels, Buena Park's supply promotes scale buildup in pipes, water heaters, dishwashers, and washing machines, reducing efficiency and increasing energy costs. Soap lathering is less effective, often requiring more detergent. Regular descaling of fixtures, installing drain screens, and annual flushing of water heaters is recommended; a water softener is advised to protect plumbing. Water quality complies with EPA standards, though 15 of 30 detected contaminants exceed EWG Health Guidelines. PFAS presence is noted from Santa Ana River runoff and wastewater, with ongoing lawsuits highlighting contamination concerns in the area.