Figure 9From: Are interventions to reduce the impact of arsenic contamination of groundwater on human health in developing countries effective? A systematic review Percentage (95% CI) of samples meeting WHO guidelines for adsorption technologies [[45]] . Act1-Act5, activated alumina at five sites; AB1 and AB2, Aqua Bind at two sites; RedHem, red haematite; AS&FH, aluminium silicate and ferric hydroxide; Adsorp1 and Adsorp2, AdsorpAs at two sites; Slurry, slurry/granular ferric hydroxide.Back to article page