drink fewer than four cups of water a day http://www.cdc.gov/pcd/issues/2013/12_0248.htm A study carried out survey drink less than 4 cups of water a day nearly half of all adults CDC survey according to the CDC drink less than 4 cups of water a day CDC survey study according to the CDC study by the CDC cited by the CDC April 2013 study A 2013 survey A study carried out this CDC article 43 percent of Americans nearly 50% half the US reports Centers for Disease Control and Prevention Centers for Disease Control and Prevention