Related by context. Frequent words. (Click for all words.) 64 arsenic 62 arsenic contamination 61 contaminants 61 polluted 59 contaminated 57 heavily polluted 57 polluted groundwater 57 contaminate groundwater 57 groundwater 57 disinfection byproducts 56 harmful contaminants 55 contaminating groundwater 55 toxic chemicals 55 contaminated groundwater 54 contaminant 54 toxic wastes 54 chlorinated solvents 54 iron manganese 54 chlordane 54 suspected carcinogen 54 Toxic chemicals 53 industrial effluents 53 pollutants 53 sediment 53 contaminates 53 contamination 53 contaminated soil 52 arsenic mercury 52 toxins 52 total dissolved solids 52 water 52 chlorinated 52 contaminated sediments 52 waterborne illnesses 52 poisonous chemicals 52 contaminated soils 52 toxic pollutants 52 toxic byproducts 51 hexavalent chromium 51 trichlorethylene TCE 51 groundwater contamination 51 sewage 51 underground aquifers 51 carcinogenic chemicals 51 polychlorinated biphenyls PCBs 51 waterborne disease 50 arsenic laced 50 mg l 50 PCBs 50 contaminate drinking 50 polluted waterways 50 tailing ponds 50 effluent 50 wastewater 50 sludge 50 Polluted 50 methyl mercury 50 nitrate 50 nitrates 49 contaminating 49 dissolved solids 49 silt 49 chloramine 49 toxic waste 49 harmful toxins 49 chlorinating 49 toxicants 49 aquifers 49 harmful chemicals 49 coliforms 48 carcinogens 48 artesian wells 48 raw sewage 48 leaching 48 ponds 48 polluted runoff 48 potable 48 fly ash 48 trichlorethylene 48 Contaminants 48 Nitrates 48 chlorides 48 dioxins 48 drinking 48 arsenic cadmium 48 mercury contamination 48 mineral salts 48 Raw sewage 47 water borne diseases 47 chlorine tablets 47 borne illnesses 47 potable water 47 faecal matter 47 endotoxins 47 chlorination 47 Pollutants 47 effluent discharge 47 sumps 47 Arsenic 47 pollution 47 desalinated