ccwd ccwater.com welcome to the contra costa water district. we deliver safe, clean water to approximately 500,000 people in central and eastern contra costa county in northern california. Category:government Global Rank:1,417,889 visits:22.5K pages/Per:2.8 ccwd.org Category:government Global Rank:2,271,538 visits:11.6K pages/Per:3.4 ADS