Drinking Water Systems Reported for ZIP 51103
SIOUX CITY, Iowa — 1 water system is associated with this ZIP in EPA service-area data
Largest Reported System
SIOUX CITY WATER SUPPLY
PWSID: IA9778054
1 EPA violation record in the five-year period ending June 30, 2026
B
Few non-health records
TapScore compliance-history grade