Note that much of the background on this issue appears to be provided by the Environmental Working Group (EWG). They are an organization which frequently promotes their agenda through scaremongering scientific claims which are frequently flat-out wrong or misrepresented.

The valid stuff in the article is the stuff where the Minnesota department of health altered their allowable limits based on published scientific concerns, and the town was over the limit. The other stuff... I can't tell the wheat from the chaff.