Related by context. Frequent words. (Click for all words.) 57 fecal bacteria 56 contaminants 56 contaminant 56 tetrachlorethylene 55 polychlorinated biphenyls PCBs 55 fecal coliform bacteria 55 fecal coliform 54 coliforms 53 arsenic 53 sediment 53 Soil samples 52 suspected carcinogen 52 nitrates 52 total dissolved solids 52 enterococci 52 arsenic mercury 51 chloramine 51 methyl mercury 50 PCBs 50 contaminated 50 hexavalent chromium 49 chromium 49 Contaminants 49 contamination 49 PCB contamination 49 harmful contaminants 49 coli 49 trace amounts 49 nitrate 49 E. coli bacteria 49 radioactive cesium 49 chloramines 48 dioxins 48 polychlorinated biphenyls 48 toxin 48 E. coli 48 PFOS 48 toxicants 48 algal bloom 48 pollutants 48 coliform 48 dioxin 48 naturally occurring bacteria 48 toxins 48 trihalomethanes 47 arsenic cadmium 47 mercury contamination 47 polluted groundwater 47 Sulfate 47 tritium 47 mercury arsenic 47 Tittabawassee River 47 selenium 47 carcinogenic chemicals 47 PBDE 47 turbidity 47 toxic chemicals 47 trichlorethylene 47 ash ponds 47 fecal matter 47 fecal contamination 47 bromate 46 sediments 46 perchlorate 46 vinyl chloride 46 petroleum hydrocarbons 46 substances 46 pollutant 46 bacteria 46 Zebra mussels 46 coliform bacteria 46 chloride 46 Perchlorate 46 pesticides herbicides 46 E.coli bacteria 46 sulfate 46 chlorinated 45 endocrine disruptors 45 ammonia 45 alkalinity 45 suspended solids 45 marine sediments 45 hydrogen sulfide 45 Sediment 45 aquatic organisms 45 strontium 45 Giardia 45 radioactive tritium 45 dissolved solids 45 sediment samples 45 drainage basins 45 silt 45 malachite green 45 Nitrates 45 mill tailings 45 e coli 45 concentrations 45 fracking fluids 45 phosphorus 45 sulphate 45 phosphorous