City overview · Santa Clara County
PFAS in Los Altos, CA
Low LevelEPA UCMR 5 tested 1 public water system serving the Los Altos area across 2 ZIP codes. Only trace PFAS were detected across Los Altos's tested systems.
Plain English
01What this means for Los Altos
The water systems serving the Los Altos area measured only low, trace concentrations of PFAS — well below the EPA's Maximum Contaminant Levels. For most residents this represents minimal risk from drinking water. Review your specific ZIP below, and check your utility's annual Consumer Confidence Report for year-over-year trends.
By utility
02Water systems serving Los Altos
By ZIP code
03Find your exact result
Contamination can differ block to block. Select your ZIP code for the precise reading at the utility that serves your address.
Source & Methodology
About this data
City-level figures aggregate the individual public water systems tested under EPA UCMR 5 whose service area falls within the Los Altos area. Values reflect water quality at the treatment plant; your home's plumbing can affect what reaches your tap. Select your ZIP above for the utility-specific reading.