Local water quality
Water quality in San Mateo, California
4 public water systems · EPA data
The bottom line
EPA records for the water serving San Mateo, California show Lead, Copper. A filter independently certified to reduce those exact contaminants is the most direct fix.
What's in San Mateo's water
Contaminants EPA has recorded across San Mateo's water systems, and how many certified filters remove each.
Water systems serving San Mateo
Open a system for its full report — measured levels vs. federal limits, PFAS, and the certified filters that remove each contaminant.
Filter your San Mateo water
Match a certified filter to what's actually in your water — a filter certified for lead may do nothing for PFAS or fluoride.