Related by context. Frequent words. (Click for all words.) 70 PCBs polychlorinated biphenyls 67 Trichloroethylene 66 polychlorinated biphenyls PCBs 66 organochlorines 66 polybrominated diphenyl ethers 64 benzo pyrene 64 furans 63 Hexavalent chromium 63 suspected carcinogen 62 carbon tetrachloride 62 Methylmercury 62 chlordane 62 mercury PCBs 62 PBDE 62 lead mercury cadmium 62 benzene toluene 62 Hydrogen sulfide 61 Contaminants 61 ammonia nitrogen 61 tetrachlorethylene 60 Dioxins 60 PCBs 60 chlorinated solvents 60 Volatile organic compounds 60 Enterococcus 60 corrosives 60 organochlorine pesticides 60 polycyclic aromatic hydrocarbons PAHs 60 aromatic hydrocarbons 59 mercury cadmium 59 ammonium chloride 59 dimethyl 58 Parabens 58 methylene chloride 58 antimony trioxide 58 Acetic Acid 58 arsenic mercury 58 dieldrin 58 trichlorethylene TCE 58 triclocarban 58 endocrine disrupting 58 toxic pollutant 58 cadmium mercury 58 Ammonium 57 carcinogenic chemicals 57 endotoxins 57 Particulates 57 Kuan Yin Taiwan 57 endocrine disruptor 57 THMs 57 polyunsaturated fatty acid 57 acrolein 57 Acrylamide 57 Contaminant 57 Residues 57 Hydrochloric acid 57 Sulfate 57 Flame Retardant 57 polycyclic aromatic hydrocarbons 57 Phenol 57 DBPs 57 benzoic acid 57 iron manganese 57 perfluorochemicals 57 methyl mercury 57 inorganic compounds 57 Sulfur dioxide 56 mercury arsenic 56 inorganic arsenic 56 zinc cadmium 56 Air Pollutants 56 halogenated 56 endocrine disrupting chemicals 56 furan 56 dioxins 56 polychlorinated biphenyls 56 phosphine 56 mold fungi 56 Chlorpyrifos 56 endocrine disruptors 55 stearic acid 55 harmful contaminants 55 Turbidity 55 Methyl 55 arsenic cadmium 55 ethylbenzene 55 toxicant 55 nitric 55 Toxic chemicals 55 oxalic acid 55 zinc Zn 55 Coliform bacteria 55 PFOS 55 methamidophos 55 Fatty acids 55 disinfection byproducts 55 μg L 55 Nitrogen oxides 55 pyrethrins 55 peroxides 55 Disinfectants