M.I. Magyar; V.G. Mitchell; A.R. Ladson; C. Diaper (2008). "Lead and other heavy metals: common contaminants of rainwater tanks in Melbourne"(PDF). Water Down Under 2008. CSIRO: 415. "Aluminium and cadmium can be an impurity in zinc galvanised iron roofs (Gromaire et al., 2001, Van Metre and Mahler, 2003) and therefore found in collected tank rainwater. Indeed, in Study 2, the tank with high concentration of Cd collected water from a galvanised iron roof."
Texas Water Development Board; Chris Brown Consulting; Jan Gerston Consulting; Stephen Colley/Architecture; Hari J. Krishna (2005). The Texas Manual on Rainwater Harvesting(PDF). Texas Water Development Board. p. 88 pages. Archived from the original(PDF) on 2009-01-06.
Texas Water Development Board; Chris Brown Consulting; Jan Gerston Consulting; Stephen Colley/Architecture; Hari J. Krishna (2005). The Texas Manual on Rainwater Harvesting(PDF). Texas Water Development Board. p. 88 pages. Archived from the original(PDF) on 2009-01-06.