““The impact of human activities on our environment inevitably trickles downstream, impacting our drinking water,” EWG senior science analyst Sydney Evans tells Fortune. She adds that while many of the contaminants have likely been long present in our water and are only being detected now because of improved scientific methods, others appear to be new.
“I would argue that a lot of it has been the way that chemicals and industries are regulated in this country—allowing for a huge number of chemicals to be approved without a whole lot of underlying research to prove that they’re safe,” she says.”
https://www.yahoo.com/news/truth-american-drinking-water-report-050100704.html