Drinking Water Systems Reported for ZIP 63664
POTOSI, Missouri — 3 water systems are associated with this ZIP in EPA service-area data
Largest Reported System
WASHINGTON COUNTY PWSD 1
PWSID: MO6024633
1 EPA violation record in the five-year period ending June 30, 2026
B
Few non-health records
TapScore compliance-history grade
Other Systems Reported for This ZIP
POTOSI PWS
2,527 served80 historical records3 recent
C
POTOSI EAST
900 served19 historical records1 recent
B