Contra Costa County, California

6 active water systems in this county.

Water System	Population Served	Source	Violations	Health-Based
Brentwood	64,513	Surface Water Purchased	12	2
City of Martinez	30,997	Surface Water Purchased	2	0
City of Antioch	115,074	Surface Water	0	0
City of Pittsburg	62,500	Surface Water Purchased	0	0
Ebrpd Bay Point Regional Shoreline	105	Groundwater	0	0
Tess Farm Market	25	Groundwater	0	0