Related by context. Frequent words. (Click for all words.) 74 benzene 61 xylene 60 Ethylene 58 toluene 57 Methanol 56 Ammonia 55 vinyl chloride 55 Formaldehyde 55 Dioxins 53 butadiene 53 Naphtha 52 Nitrate 52 Dioxin 51 paraxylene 51 carcinogen 51 MTBE 51 Chlorine 50 ethylene 50 Styrene 49 Cadmium 49 styrene 49 Tritium 49 dioxins 49 propylene 49 trichlorethylene 49 hydrofluoric acid 49 methyl tertiary butyl ether 48 caustic soda 48 contaminant 48 arsenic 48 Pollutants 48 acetic acid 48 Chemicals 48 Sulfur 48 hexavalent chromium 47 Nitrogen 47 VOCs 47 phenol 47 chemical 47 solvents 47 gasoline additive 47 sulfuric acid 47 Contaminants 46 Gasoline 46 methanol 46 PFOS 46 Chemical 46 Pesticides 46 dioxin 46 trihalomethanes 46 carcinogens 46 naphtha 46 ethylene glycol 46 Arsenic 46 PAHs 46 Crude Oil 46 volatile organic compounds 46 olefins 46 sulfur 45 Aspartame 45 polycyclic aromatic hydrocarbons 45 Polyethylene 45 acetaldehyde 45 toxic chemicals 45 Polypropylene 45 Contamination 45 pollutant 45 Additive 44 TCE 44 human carcinogen 44 citric acid 44 chromium 44 carcinogenic 44 Bitumen 44 chemicals 44 acrylamide 44 toxic substances 44 colorless odorless 44 esters 44 nitric acid 44 Sodium 44 Additives 43 Perchlorate 43 Pollution 43 PCBs 43 phosphoric acid 43 sulfur dioxide 43 manganese 43 Radon 43 Pesticide 43 Carbon Monoxide 43 Petrochemical 43 Fertilizer 43 PFOA 43 petrochemical 43 ethane 43 Plutonium 43 Seawater 43 chlorine 43 hydrogen sulfide 43 Emissions