Drinking Water Systems Reported for ZIP 94574
ST. HELENA, California — 4 water systems are associated with this ZIP in EPA service-area data
Largest Reported System
ST. HELENA, CITY OF
PWSID: CA2810004
3 EPA violation records in the five-year period ending June 30, 2026
D
Several health-based records
TapScore compliance-history grade
Other Systems Reported for This ZIP
VAILIMA ESTATES MUTUAL WATER
25 served9 historical records1 recent
B
SPINDRIFT MARINA
100 served26 historical records
A
ADVENTIST HEALTH - ST. HELENA HOSPITAL
817 served2 historical records
A