Early testing is a key component to preventing lead poisoning in children, according to health officials. Testing events will be held at daycares, schools, libraries, places of worship and community organizations on the South Side over the next two years.

A new report by WBEZ reporter Monica Eng takes a closer look at how the district is testing for lead in the water at 28 schools and whether this method follows best practices.

Lead levels in the water supply are getting nationwide attention after the ongoing crisis in Flint, Michigan came into the spotlight. Now, CPS says it will test for lead in the water at 28 schools, even though it's not legally required to.