Arsenicmg/L≤0.5≤0.5≤0.2 Leadmg/L≤1≤1≤0.2 Cadmiummg/L≤0.1≤0.1≤0.05 Chromium-VImg/L≤0.1≤0.1≤0.05 Coppermg/L≤5≤5≤1 Nickelmg/L≤1≤1≤0.2 Mercurymg/L≤0.02≤0.02≤0.005 Zincmg/L≤5≤5≤2 Fluoridemg/L≤25≤25≤5 ...