Related by context. Frequent words. (Click for all words.) 71 arsenic mercury 65 mercury arsenic 64 mercury cadmium 64 PCBs polychlorinated biphenyls 64 iron manganese 64 Hexavalent chromium 61 Methylmercury 61 zinc cadmium 61 Hydrogen sulfide 61 tremolite 61 organochlorines 60 potent neurotoxin 60 toxic pollutant 60 disinfection byproducts 60 carbon disulfide 60 Sulfate 59 triclocarban 59 naturally occurring mineral 59 polybrominated diphenyl ethers 59 arsenic cadmium 59 ammonia nitrogen 59 lead mercury cadmium 58 cadmium mercury 58 corrosives 58 Volatile organic compounds 58 sulphates 58 carbon tetrachloride 58 manganese 58 toxic residues 58 benzo pyrene 58 THMs 58 mold fungi 58 toxic byproducts 57 naturally occurring radioactive 57 suspected carcinogen 57 chlordane 57 manganese oxide 57 harmful contaminants 57 inorganic compounds 57 polychlorinated biphenyls PCBs 57 benzene toluene 57 Hydrochloric acid 57 purines 57 mercury PCBs 56 pathfinder elements 56 contaminating groundwater 56 naturally occuring 56 Sulfur dioxide 56 Nitrogen oxides 56 Contaminants 56 Kuan Yin Taiwan 56 DBPs 56 respiratory irritant 56 fecal material 56 contaminants 56 hydroxide 56 oxidising 55 toxic pollutants 55 polluting groundwater 55 carcinogenic chemicals 55 polycyclic aromatic hydrocarbons PAHs 55 PGEs 55 airborne particulates 55 zinc Zn 55 methyl mercury 55 Sulfuric acid 55 toxic substances 55 Ammonium 55 hydrogen chloride 55 leachable 55 endocrine disrupting 55 cobalt nickel 55 toxicants 55 fatty substances 55 Toxic chemicals 55 iron oxides 55 sodium nitrate 55 mutagens 55 naturally occurring 55 toxic 55 Acidic 55 Sulfide 55 potassium magnesium 55 toxins 54 PRWeb disclaims any 54 selenium 54 tetrachlorethylene 54 sulfide minerals 54 contaminant 54 fluorides 54 acidify 54 kaolinite 54 powerful neurotoxin 54 arsenic 54 furans 54 acrolein 54 fracturing fluids 54 oxalic acid 54 chromium 54 calcium magnesium 54 copper Cu