ASCE (2013) Report Card on America’s Infrastructure. American Society of Civil Engineers.
 USEPA (2010) Clean Water Needs Survey 2008: Report to Congress. The United States Environmental Protection Agency. http://water.epa.gov/scitech/datait/databases/cwns/upload/cwns2008rtc.pdf
 ASCE (2011) Failure to Act: The Economic Impact of Current Investment Trends in Water and Wastewater Treatment Infrastructure. American Society of Civil Engineers.
 Food & Water Watch (2010) United Water: Suez Environment’s Poor Record in the United States.
 Black & Veatch (2012) Strategic Directions in the U.S. Water Utility Industry.
 Prequin (2013) Global Infrastructure Trends in 2013. Global Infrastructure Investors Summit.
 The World Bank (2012) Private Participation in Infrastructure Database. Public-Private Infrastructure Advisory Facility, Washington DC.
 National Council for Public-Private Partnerships (2013) Glossary of Terms. http://www.ncppp.org
 InfraPPP (2012) PPP for Operation & Maintenance of Wastewater Treatment Assets for Nassau County. Infras PPP Databases. http://infrapppworld.com/infrastructure-funds
 GAO (2005) Highway and Transit Investments: Options for Improving Information on Projects’ Benefits and Costs and Increasing Accountability for Results. United States Government Accountability Office.