US WATER QUALITY VIOLATIONS. “In 2011, there were 8,322 reported violations of maximum contaminant levels affecting 14,915,599 people. There were 109,167 total violations from all categories in 2011 — a big increase from 2010 where there were only 75,857 total violations.”
http://www.watertechonline.com/articles/166470-infusing-technology-into-the-drinking-water-industrys-future