1. United Nations Environment Programme, Chemicals, Global Mercury assessment, Report no. 54790-01, Geneva, Switzerland, 2002.
2. U.S. EPA, Mercury Study Report to Congress, EPA-452/R-97-003, 1997.
3. Directive 2008/105/EC of the European Parliament and of the Council of 16 December 2008 on environmental quality standards in the field of water policy.
4. U.S. EPA, National Primary Drinking Water Standards, EPA-816/F-09-0004, 2009.
5. Council Directive 98/83/EC on the quality of water intended for human consumption.