Cumulative number of certified industrial hygienists in the U.S. 1997-2016
This statistic depicts the cumulative number of certified industrial hygienists in the U.S. from 1997 to 2016. The numbers are based on CIH (certified industrial hygienists) certificates issued over the given period. In 2016, there were a cumulative 11,100 industrial hygienists in the United States. The United States has the largest and most active industrial hygiene practice in the world.