1. Chromium-6 (Hexavalent Chromium) in Drinking Water, California Department of Health Services, Update 22 August 2001.
2. Governor Signs Bill Speeding Water Testing, The Los Angeles Times, Valley Ed., 30 September 2000, p. 1.
3. Research on Toxin in Water is Urged, San Diego Union-Tribune, 8 January 2001, p. A3.
4. Chromium 6 Found in Private Wells, http://www.watertechonline.com, 20 February 2001.
5. EPA Method 218.6, Determination of Dissolved Hexavalent Chromium in Drinking Water, Groundwater and Industrial Wastewater Effluents by Ion Chromatography,1991