Related by context. Frequent words. (Click for all words.) 61 fluoride 60 dissolved solids 57 total dissolved solids 57 maximum contaminant 56 water 56 fluoridated water 55 trihalomethanes 55 arsenic 55 groundwater 54 nitrates 54 chloramine 54 perchlorate 54 chloramines 53 radium 52 chromium 52 nitrate 52 Fluoride 52 perchlorate contamination 52 coliforms 52 fluoridated 52 groundwater basin 52 methyl mercury 51 iodine 51 dental fluorosis 51 mg l 51 ppb 51 chlorine 50 underground aquifers 50 polluted groundwater 50 fecal bacteria 50 contaminants 50 suspected carcinogen 50 hexavalent chromium 50 underground aquifer 50 chlorination 50 fecal coliform bacteria 50 aquifers 50 arsenic contamination 50 concentrations 50 harmful contaminants 50 contaminant 49 dental decay 49 iodide 49 fluoridate 49 calcium magnesium 49 mercury 49 turbidity 49 potable water 49 alkalinity 49 sulfate 49 iron manganese 49 sodium chloride 49 aquifer 49 bromate 48 prevent tooth decay 48 manganese 48 Soil moisture 48 groundwater pumping 48 Perchlorate 48 trichlorethylene 48 groundwater recharge 48 chlorides 48 phosphorus 48 fecal coliform 48 selenium 48 fluorosis 47 fluoridating 47 toxic byproducts 47 Nitrates 47 dissolved oxygen 47 radionuclides 47 arsenic mercury 47 chlorinating 47 cryptosporidium 47 sodium hypochlorite 46 chlorinate 46 hydrofluoric acid 46 phosphorous 46 chlorinated 46 Groundwater 46 chloride 46 potable drinking 46 evaporation ponds 46 dissolved oxygen levels 46 micronutrient 46 oxalate 46 tetrachlorethylene 46 benzene 46 treated effluent 46 fine particulates 46 sulphate 46 potable 46 sediment 46 dietary calcium 46 ozone concentrations 46 pollutants 46 drinking 45 organic acids 45 nutrient 45 Drinking Water 45 drinkable water