Related by context. Frequent words. (Click for all words.) 51 contaminant 50 disinfection byproducts 50 contaminants 49 perchlorate 47 perchlorate contamination 47 contaminating groundwater 46 toxicants 46 harmful contaminants 46 urate 46 toxins 45 groundwater 45 suspected carcinogen 44 flouride 44 caffeinated alcoholic drinks 44 toxic chemicals 43 toxic byproducts 43 fracking fluids 43 methyl mercury 43 chromium 43 contaminate groundwater 43 polluted groundwater 43 acrolein 43 Hydrogen sulfide 43 harmful substances 43 hexavalent chromium 42 mercury 42 fetuses infants 42 polluted runoff 42 radioactive contaminants 42 trihalomethanes 42 dissolved solids 42 pollutants 42 total dissolved solids 41 endocrine disrupters 41 lindane 41 aquifers 41 water 41 Perchlorate 41 arsenic 41 toxic substances 41 contaminate drinking 41 Controlled burns 41 harmful toxins 41 aquifer recharge 41 Health Hazard Assessment 41 groundwater basin 41 pesticides 41 fine particulate 41 pollutant 40 ultrafine particles 40 hormone disrupting 40 arsenic contamination 40 maximum contaminant 40 fluoride 40 nitrobenzene 40 smokestack emissions 40 bisphenol A. 40 radioactive iodine 40 nitrates 40 Floridan Aquifer 40 bromate 40 endocrine disruptor 40 contamination 40 thyroid glands 40 dental amalgam 40 sewage discharges 40 drinking 40 radionuclides 40 underground aquifer 40 toxicity 40 Sulfur dioxide 40 nonpoint source pollution 40 chlorinated solvents 40 trichlorethylene TCE 40 PFOS 40 wastewater discharges 40 selenium 40 potentially harmful 40 benzene 39 phosphorus 39 waterborne illnesses 39 tritium 39 chloramine 39 potentially carcinogenic 39 carcinogen 39 ash ponds 39 contaminated groundwater 39 chemicals 39 atrazine 39 nutrient 39 endotoxins 39 watersheds 39 neurodevelopment 39 hormone cortisol 39 methylmercury 39 additive MTBE 39 Benjamin H. Grumbles 39 vapor intrusion 39 endocrine disruptors 39 groundwater recharge 39 stormwater runoff