Spring Valley

Spring Valley, CA receives a water quality score of 100/100 (Grade A) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 1 public water system serving the area.

Spring Valley's water quality is above the national average, with strong compliance records and low contaminant levels. Residents generally receive clean, safe tap water that meets EPA standards.

Spring Valley's score of 100 is 11 points above the California state average of 89, and above the nationwide average of roughly 78/100 across all U.S. states.

Spring Valley residents receive their tap water from a single system, which simplifies oversight across this mid-size California community. This unified management has successfully evaluated the environmental challenges typical of the West Coast, where diverse geological formations, large urban centers, and agricultural runoff from the Central Valley can threaten source water quality. For prospective homebuyers, the local system's flawless evaluation and top-tier rating provide regulatory reliability that their drinking water is exceptionally well-managed.

Water quality data is sourced from the U.S. EPA SDWIS database and updated quarterly. Learn about our scoring methodology → Read our California water quality rankings report →