Related by context. Frequent words. (Click for all words.) 60 arsenic mercury 60 trichlorethylene TCE 59 suspected carcinogen 59 mercury arsenic 57 carcinogenic chemicals 56 PCBs polychlorinated biphenyls 56 arsenic cadmium 55 toxic substances 55 cadmium mercury 55 carbon tetrachloride 55 Toxic chemicals 55 polychlorinated biphenyls PCBs 54 toxic chemicals 54 trichlorethylene 54 cleaning solvents 54 contaminated 54 contaminants 53 contaminating groundwater 53 toxicants 53 toxins 53 contamination 52 chlordane 52 tetrachlorethylene 52 contaminates 52 contaminating 52 respiratory irritant 52 chemicals 52 arsenic 51 chlorinated solvents 51 corrosives 51 contaminant 50 Hydrogen sulfide 50 Nitrogen oxides 50 trace amounts 50 polycyclic aromatic hydrocarbons 50 carcinogens 50 Contaminants 50 Rat poison 50 poisonous chemicals 50 toxic 49 noxious chemicals 49 naturally occurring radioactive 49 harmful contaminants 49 E coli bacteria 49 naphthalene 49 Diesel exhaust 48 MtBE 48 methylene chloride 48 polybrominated diphenyl ethers 48 toxic byproducts 48 polluted groundwater 48 iron manganese 48 solvents 47 potent neurotoxin 47 dieldrin 47 erionite 47 polycyclic aromatic hydrocarbons PAHs 47 contaminate 47 potentially carcinogenic 47 polychlorinated biphenyls 47 Elevated levels 47 noxious odors 47 Arsenic 47 pollutants 47 contaminated soils 46 airborne toxins 46 perchlorethylene 46 Sulfur dioxide 46 fracking fluids 46 hazardous substances 46 hexavalent chromium 46 harmful toxins 46 biohazards 46 harmful chemicals 46 colorless liquid 46 toxic vapors 46 carcinogen 46 americium 46 moth balls 46 roofing tar 46 Contaminated 46 petroleum distillates 46 benzene 46 hazardous chemicals 46 trigger allergic reactions 45 rotten egg odor 45 coal tar 45 chemical 45 biotoxins 45 poisoning 45 toxin 45 Toxic 45 toxic pollutants 45 polluted 45 overpowering smell 45 leached 45 furans 45 contaminate groundwater 45 contaminate drinking 45 Superfund site 45 endocrine disruptor