This is an addendum to the WHO publication “The Public Health Impact of Chemicals: Knowns and Unknowns” (WHO, 2016). Data presented in this update refer to the year 2019 while the initial publication presented data for 2012 (WHO, 2016) and the first data update presented data for 2016 (WHO, 2018)

This is an addendum to the WHO publication “The Public Health Impact of Chemicals: Knowns and Unknowns” (WHO, 2016) and presents an update of the main data tables and figures for the year 2016.