U.S. Environmental Protection Agency, Office of Water Programs
U.S. Department of the Interior
Rules and Regulations Implemented Under the Clean Water Act, U.S. Environmental Protection Agency
Rules and Regulations Implemented Under the Safe Drinking Water Act, U.S. Environmental Protection Agency
Clean Water Act: Changes Needed if Key EPA Program is to Help Fulfill the Nation's Water Quality Goals, U.S. Government Accountability Office, January 2014
Clean Water Act: Longstanding Issues Impact EPA's and States' Enforcement Efforts, U.S. Governmental Accountability Office, October 2009
Safe Drinking Water Act: Improvements in Implementation are Needed to Better Assure the Public of Safe Drinking Water, U.S. Government Accountability Office, July 2011
Water Infrastructure: Approaches and Issues for Financing Drinking Water and Wastewater Infrastructure, U.S. Government Accountability Office, March 2013
This is just a small sample of relevant governmental reports. For more reports, see the following links: