Modesto, California Water Violations

13 water systems serve Modesto, California, providing drinking water to an estimated 246,594 people. These systems have 2 health-based violations on record, meaning contaminant levels exceeded EPA maximum contaminant levels (MCLs) or required treatment standards were not met.

Select a water system below to see its full violation history, lead and copper testing results, and compliance status.

Water System	Population Served	Source	Violations	Health-Based
City of Modesto - Grayson	914	Groundwater	2	2
City of Modesto - Salida	14,537	Groundwater	14	0
Charity Way Water System	25	Groundwater	1	0
City of Modesto	218,771	Surface Water Purchased	0	0
City of Waterford	8,788	Groundwater	0	0
City of Modesto - Del Rio	1,327	Groundwater	0	0
City of Modesto - South Turlock	1,099	Groundwater	0	0
Waterford - Hickman	597	Groundwater	0	0
City of Modesto - Walnut Manor	175	Groundwater	0	0
City of Modesto - North Turlock	172	Groundwater	0	0
City of Modesto - Central Turlock	119	Groundwater Purchased	0	0
Rolling Hills Nut Company	45	Groundwater	0	0
Zansco	25	Groundwater	0	0