Smiling mother with baby Biomonitoring measures chemicals in people’s bodies. By comparing differences between groups of people, we can learn who is being exposed to what, if some groups are exposed more than others, and if this changes over time. The MN Biomonitoring program was established by the 2007 Minnesota Legislature under Minnesota Statute 144.995. Minnesota Biomonitoring is also one of six states to receive a State-based Public Health Laboratory Biomonitoring Programs grant from CDC.