. >> reporter: dr mona atichia is the head of hurley hospital paediatrics. she spent weeks analysing water data and. >> the impact of led poisoning we see later. if five years we will have more kids who need early intervention and special education, in 10 years there will be more kids with an adhd diagnosis. in 15 to 20 years, more kids with violent behaviour. we don't see the effects now. we will see them later. >> reporter: now several flint schools only allow kids to drink bottled water. >> it was jaw dropping to realise what had been going on. i think what made me physically mad was that it didn't have to happen. it was preventible. boiling. >> yeah. >> do you want to help me? >> yeah joochlt many flint residents worry about health effects. she has a 7-year-old daughter and another child on the way >> when this has been going on and no-one has been aware of it for a long period of time, i think it would concern any parpt because most of the damage that has caused from it is irreinvestigate set versible-- irreinvestigate set verse-- irreversible. she is a