Related by context. Frequent words. (Click for all words.) 59 PCBs polychlorinated biphenyls 57 arsenic mercury 56 mercury arsenic 56 benzene toluene 55 manganese oxide 55 mercury cadmium 55 zinc Zn 53 hydroxide 53 arsenic cadmium 53 iron manganese 51 polychlorinated biphenyls PCBs 51 benzo pyrene 50 cadmium mercury 50 manganese 50 hydrogen chloride 50 iron oxides 50 Leaching 50 Ammonium 50 arsenate 50 copper Cu 50 galena 50 Rhenium 50 suspended solids 49 urate 49 PGEs 49 barium 49 Hydrogen sulfide 49 zinc 49 apatite 49 THMs 48 Kuan Yin Taiwan 48 cobalt nickel 48 carbon tetrachloride 48 suspected carcinogen 48 endotoxins 48 naturally occurring mineral 48 sulphide minerals 48 copper ores 48 bioaccumulation 48 Sulfate 48 pathfinder elements 48 toxic pollutant 47 polycyclic aromatic hydrocarbons 47 silicates 47 calcium magnesium 47 sulphates 47 monazite 47 chlorinated solvents 47 sulfate 47 osmium 47 infectious prions 47 purines 47 tetrachlorethylene 47 calcium sulfate 47 polymerized 47 elemental sulfur 47 kaolinite 47 Barium 47 sulphate 47 sodium dichromate 47 dieldrin 47 americium 47 dioxide 47 peroxides 47 chlordane 47 respiratory irritant 47 Contaminants 47 methyl mercury 47 chromate 47 polychlorinated biphenyls 47 ammonia nitrogen 47 DBPs 47 Elevated levels 46 acrolein 46 chloride 46 harmful contaminants 46 hydride 46 triclocarban 46 polycyclic aromatic hydrocarbons PAHs 46 mercury PCBs 46 Sulfur dioxide 46 contaminants 46 serum calcium 46 isotope ratios 46 Toxic chemicals 46 Au t 46 trichlorethylene 46 welding fumes 46 electrowinning 46 tetrahedrite 46 potent neurotoxin 46 Domoic acid 46 toxicants 46 toxic byproducts 46 #,# butadiene 46 Dioxins 46 potassium magnesium 46 selenium 46 disinfection byproducts 46 Hydrochloric acid 46 phosphine