A Government Accountability Office (GAO) report criticized the Environmental Protection Agency (EPA) for deciding not to regulate any new possible drinking water contaminants, with one recent exception, since the Safe Drinking Water Act was amended in 1996.
The amendments to the Act say that every 5 years the EPA is to select for consideration of regulation at least 5 contaminants that present the greatest public health concern. Between 2003 and 2008, the EPA considered a total of 20 contaminants and decided to not regulate any of them.
Mitka M. Water Safety. JAMA. 2011;306(10):1073. doi:10.1001/jama.2011.1252