Drinking Water Systems in ONTARIO, California
3 water systems are reported for this city, with a combined service population of 185,010. The systems have 0 EPA violation records in the five-year period ending June 30, 2026.
Water Systems Serving ONTARIO
CHINO BASIN DESALTER AUTH. - DESALTER 1
0 served0 historical records
A
CHINO BASIN DESALTER AUTH. - DESALTER 2
0 served0 historical records
A
ONTARIO MUNICIPAL UTILITIES COMPANY
185,010 served1 historical record
A