💧 ZIP Water Report

Tap water in Palo Alto, CA — ZIP 94306

2 public water systems serving about 131,217 people. PFAS "forever chemicals" have been detected here.

A
Excellent
PFAS detected: at least one system serving this ZIP reported PFAS in EPA UCMR 5 testing. Levels and the 2024 federal limits are shown per system below.

Water systems serving 94306

City Of Palo Alto
PWSID CA4310009 · serves 67,658 · surface water
0 health-based / 0 total violations (5 yrs)
A
Cwsc Los Altos Suburban
PWSID CA4310001 · serves 63,559 · surface water
0 health-based / 0 total violations (5 yrs) · PFAS up to 3.5 ppt
A

Grades summarize EPA SDWIS violation records (last 5 years) and UCMR 5 PFAS results. They are informational, not a health determination. Methodology