Drinking Water Systems Reported for ZIP 99350
Prosser, Washington — 5 water systems are associated with this ZIP in EPA service-area data
Largest Reported System
RAINBOW COURT
PWSID: WA5370770
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
ROZA HEIGHTS WATER ASSN
110 served80 historical records2 recent
B
PROSSER CITY OF
12,070 served8 historical records1 recent
B
KIONA VILLAGE COURT
124 served52 historical records
A
ALDERDALE WATER ASSN
171 served54 historical records1 recent
B