St. Clair County Health Department GOVERNMENTHEALTH MAINTENANCE ORGANIZATIONS St. Clair County Health Department Visit Website 19 Public Square Suite 150 Belleville, IL 62220-1624 (618) 233-7703 (618) 222-1630 (fax) Hours: 8:00AM-4:00PM About About The Mission of the St. Clair County Health Department is to promote and protect the health of the residents of St. Clair County in partnership with the people we serve. ShareTweetShare0 Shares ShareTweetShare0 Shares