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(Click for frequent words.) 83 toxic chemicals 76 harmful chemicals 76 toxins 76 hazardous chemicals 75 harmful substances 71 hazardous substances 70 chemicals 68 harmful toxins 68 poisonous chemicals 67 contaminants 67 pollutants 65 carcinogens 65 toxic wastes 64 toxic pollutants 64 toxics 64 carcinogenic chemicals 63 persistent bio accumulative 63 toxic residues 62 toxic dioxins 62 polychlorinated biphenyls PCBs 62 toxicants 61 harmful contaminants 61 toxic pollutant 61 substances 61 poisonous substances 61 suspected carcinogen 61 toxic 60 toxic waste 60 tetrachloroethene 60 PCBs polychlorinated biphenyls 60 dioxins 60 Toxic chemicals 59 mercury dioxins 59 volatile organic compounds 59 flame retardant chemicals 59 PCBs dioxins 59 Volatile Organic Compounds VOCs 59 mercury cadmium 59 crystalline silica 58 pesticides 58 PAHs polycyclic aromatic hydrocarbons 58 cadmium mercury 58 chlorinated compounds 58 carcinogens mutagens 58 noxious substances 58 hazardous wastes 58 mercury arsenic 58 beryllium dust 58 carcinogenic dioxins 58 noxious chemicals 58 poisons 58 mercury potent neurotoxin 58 toxin 58 PFOAs 58 toxic pesticides 58 reproductive toxins 58 polybrominated diphenyl ether 57 benzene carcinogen 57 tetrachlorethylene 57 toxic polychlorinated biphenyls 57 harmful vapors 57 pthalates 57 solvents 57 PCBs 57 vinyl chloride 57 mercury 57 bio accumulative 57 benzene 56 cancer causer 56 lead mercury cadmium 56 bioaccumulative 56 synthetic musks 56 chemical 56 toxic vapors 56 deca BDE 56 toxic byproducts 56 trihalomethanes THMs 56 toxic gases 56 VOCs 56 carbon tetrachloride 56 carcinogenic substances 56 solvent vapors 56 toxic solvents 55 toxic flame retardants 55 endocrine disrupting chemicals 55 airborne toxins 55 hazardous waste 55 harmful pollutants 55 perfluorooctanoic acid PFOA 55 corrosives 55 arsenic cyanide 55 TCE PCE 55 triclocarban 55 carcinogenic byproducts 55 arsenic selenium 55 halogenated flame retardants 55 #,# dioxane 55 DDT PCBs 55 contaminents 55 harmful gases 55 Hazardous substances 55 carcinogen 55 potent neurotoxin 55 benzene arsenic 55 cadmium chromium 55 chlorinated solvents 55 dioxins PCBs 54 arsenic 54 radiological contaminants 54 hazardous vapors 54 cadmium arsenic 54 TBBPA 54 dioxin 54 hazardous materials 54 Asbestos fibers 54 toxic fumes 54 DDT dieldrin 54 polychlorinated biphenyl PCB 54 radioactive materials 54 mercury vapors 54 harmful byproducts 54 potent carcinogen 54 endocrine disrupting chemicals EDCs 54 carcinogen benzene 54 contaminant 54 #,# Dioxane 54 benzene toluene xylene 54 radioactive substances 54 hexavalent chromium 54 tributyl tin 54 mercury chromium 54 estrogenic compounds 54 carcinogenic 54 Chromium VI 54 carcinogenic pollutants 54 PBDE 54 radioactively contaminated 53 CFCs chlorofluorocarbons 53 solvents pesticides 53 carcinogenic substance 53 polychlorinated biphenyl 53 vinyl lunchboxes 53 microcystins 53 biphenyls PCBs 53 chromium VI 53 flammable corrosive 53 formaldehyde carcinogen 53 brominated flame retardants 53 trichlorethylene 53 radionuclides 53 arsenic cadmium 53 engineered nanomaterials 53 phthalates 53 flame retardants 53 artificial sweetener saccharin 53 radioactive 53 PBDEs 53 harmful gasses 53 toxic gasses 53 methyl chloride 53 phthalates chemicals 53 PVC shower curtains 53 contaminated 53 potentially carcinogenic 53 Brominated flame retardants 52 neutralized VX 52 benzopyrene 52 lindane 52 polyaromatic hydrocarbons 52 tremolite asbestos 52 neurotoxin 52 perfluorinated compounds 52 toxic hydrogen sulfide 52 PVC plastics 52 hydrogen sulfide 52 chlorine byproducts 52 toxic hydrogen sulphide 52 disinfection byproducts 52 cadmium mercury hexavalent 52 potentially harmful 52 pollutant 52 chromium cadmium 52 BFRs 52 arsenic mercury 52 polynuclear aromatic hydrocarbons 52 Dioxins 52 pathogenic micro organisms 52 DecaBDE 52 arsenic chromium 52 VOCs Volatile Organic Compounds 52 arsenic beryllium 52 Flame retardants 52 PFCAs 52 drywall emits 52 trichloroethene 52 dioxins furans 52 hormone disrupter 52 PPCPs 52 arsenic cadmium chromium 52 reproductive toxicants 52 Inorganic arsenic 52 Volatile organic compounds 52 noxious gases 52 decaBDE 52 phthalate 52 polluting groundwater 52 cadmium 52 dioxane 52 harmful dioxins 52 chemical malachite green 52 chemical bromate 52 organophosphate pesticide 52 polybrominated 52 hazardous solvents 52 perfluorochemicals PFCs 52 DEHP 52 polybrominated diphenyl ethers PBDEs 52 chemical vapors 51 brominated flame retardants BFRs 51 fluorocarbons 51 pesticide residues 51 fire retardants 51 perfluorooctane sulfonate PFOS 51 Pollutants 51 Chrysotile asbestos 51 tetrachlorethylene PCE 51 Ozone disinfection produces 51 chemical compounds 51 heptachlor 51 pentachlorophenol 51 carcinogenic benzene 51 elemental mercury 51 cyanides 51 formaldehyde benzene 51 asbestos fibers 51 brominated flame retardant 51 methyl mercury 51 PVC phthalates 51 methylene chloride 51 pesticide 51 radioactive contaminants 51 benzene toluene 51 Polychlorinated biphenyls PCBs 51 PDBEs 51 DINP 51 arsenic benzene 51 incinerator ash 51 radioactive material 51 hormone disrupters 51 degreasing solvent 51 powerful neurotoxin 51 chemical residues 51 PCBs pesticides 51 pesticide lindane 51 DEHA 51 friable asbestos 51 deadliest germs 51 THMs 51 organochlorine pesticides 51 hazardous 51 Methylmercury 51 Hydrogen sulfide 51 airborne pollutants 51 Hexavalent chromium 51 PBDEs polybrominated diphenyl ethers 51 chlorine 51 TCE trichlorethylene 51 hormone disruptors 51 Persistent Organic Pollutants POPs 51 trichloroethane 51 toluene benzene 51 phthalate DEHP 51 chlorinated flame retardants 50 potent toxin 50 hydrofluoric acid 50 herbicide Atrazine 50 perfluorochemicals 50 pollutants emitted 50 trichlorethylene TCE 50 hexachlorobenzene 50 #,#,# trichloroethane 50 Chlordane 50 trichloroethene TCE 50 cadmium barium 50 carcinogenic PCBs 50 ozone particulates 50 persistent bioaccumulative 50 cyanide arsenic 50 vapors 50 SVHCs 50 perchlorethylene 50 Lindane 50 polybrominated diphenyl ethers 50 harmful radiations 50 airborne particulates 50 cadmium hexavalent chromium 50 Vinyl chloride 50 chlorinated pesticides 50 polychlorinated PCBs 50 pesticides herbicides fungicides 50 furans 50 glycol ethers 50 chlorine bleaches 50 poisonous hydrogen sulphide 50 polluted groundwater 50 Polychlorinated biphenyls 50 biohazardous 50 vinyl chloride monomer 50 carcinogenic polycyclic aromatic hydrocarbons 50 metal degreasing 50 Improper disposal 50 residues 50 brominated flame retardants BFR 50 perfluorinated chemicals 50 ozone depleting CFCs 50 amphibole asbestos 50 estrogenic chemicals 50 foul smelling odor 50 Elemental mercury 50 organotins 50 Radioactive material 50 tributyltin 50 organochlorines 50 Sodium hydroxide 50 organophosphorous 50 antimony trioxide 50 hydrochlorofluorocarbons HCFCs 50 plutonium americium 50 Zonolite insulation 50 neuro toxin 50 groundwater contaminant 50 cleaning solvents 50 organophosphate exposure 50 halogenated 49 carcinogenic compounds 49 spontaneously ignite 49 fecal coliform contamination 49 ozone depleting chemicals 49 polluted 49 carcinogenic fibers 49 2 butoxyethanol 49 neurotoxins 49 halogenated compounds 49 polycyclic aromatic hydrocarbons PAHs 49 toxaphene 49 Polychlorinated Biphenyls 49 harmful 49 hydrogen sulphide H2S 49 organophosphates 49 phosphorous 49 effluents 49 pesticide chlorpyrifos 49 contaminates 49 organic pollutants POPs 49 phthalates DEHP 49 algal toxins 49 Triclosan 49 bioaccumulation 49 Hazardous wastes 49 Toxins 49 flammable solvents 49 benzene vapors 49 bisphenol A. 49 polychlorinated biphenyls 49 hexavalent chromium polybrominated biphenyls 49 inhalation hazard 49 hazardous fumes 49 endocrine disrupting compounds 49 hex chrome 49 radioactive iodide 49 airborne asbestos fibers 49 carcinogenic chemical 49 radium naturally occurring 49 phosphorus 49 carcinogenic toxins 49 Fecal coliform 49 PFOS 49 Volatile Organic Compounds 49 polycyclic aromatic hydrocarbons 49 smog forming compounds 49 contaminating groundwater 49 hormone disrupting 49 nitrates 49 carcinogen dioxin 49 human carcinogen 49 nitrates phosphates 49 furan 49 industrial solvent trichlorethylene 49 ethyl acrylate 49 dioxin concentrations 49 mercury vapor 49 Dioxane 49 radioactivity 49 trace amounts 49 Ionizing radiation 49 biphenyl 49 chemical perfluorooctanoic acid 49 insecticide endosulfan 49 endotoxins 49 microbiological organisms 49 bromine compounds 49 dioxin PCBs 49 Deca BDE 49 hydrocarbon vapors 49 radioactive nuclides 49 perfluorooctane sulfonate 49 flammable vapors 49 Carbon monoxide CO 49 harmful residues 49 biphenyls 49 toxic effluents 49 flammable chemicals 49 poisonous gasses 49 groundwater contaminants 48 asbestos 48 chemical perchlorethylene 48 aromatic hydrocarbons 48 cyanide 48 PBDE flame retardants 48 biohazards 48 hazardous substances pollutants 48 respiratory irritants 48 para dichlorobenzene 48 harmful microorganisms 48 chlorine bromine 48 E.Coli bacteria 48 hazardous material 48 PAHs 48 contaminated soil 48 Methyl mercury 48 PFOA 48 carbon monoxide hydrocarbons 48 #,# butadiene 48 sulfur gases 48 Diesel exhaust 48 additive methyl tertiary butyl 48 mercury selenium 48 polybrominated diphenyl ether PBDE 48 Bromate 48 mercury neurotoxin 48 Carcinogens 48 chemical #,# butanediol 48 mimics estrogen 48 dental amalgam fillings 48 attracting vermin 48 sulfurated hydrogen 48 PVC BFRs 48 methamidophos 48 Volatile Organic Compounds VOC 48 penta BDE 48 pesticide methamidophos 48 chlorine ammonia 48 Sodium cyanide 48 petroleum distillates 48 firefighting foams 48 plastic softeners 48 clogging landfills 48 potentially hazardous 48 acids solvents 48 Trichloroethylene TCE 48 methomyl 48 contamination 48 recyclable plastics 48 chlorides 48 dibutyl phthalate 48 messenger dopamine 48 gases 48 HBCD 48 diethylene glycol DEG 48 herbicides pesticides 48 phosphine 48 inorganic contaminants 48 toxic mercury vapors 48 flame retardants PBDEs 48 Tetrachloroethylene 48 endocrine disruptors 48 pollution 48 caustic chemicals 48 particulates 48 unpleasant odors 48 chlorinated hydrocarbons 48 PCBs dioxin 48 PFOA perfluorooctanoic acid 48 endocrine disrupting chemical 48 impurities 48 noxious fumes 48 cadmium poisoning 48 Endocrine disruptors 48 Hydrogen Sulfide 48 mercury PCBs 48 carcinogenic fumes 48 contaminate aquifers 48 organophosphorus 48 deadly neurotoxin 48 chemical diethylene glycol 48 DuPont DeLisle plant 48 fragrances dyes 48 Hazardous Substances Act 48 dioxin contaminated 48 nauseating odors 48 Ozone depleting 48 fracing fluids 48 Dechlorane Plus 48 lead cadmium arsenic 48 endocrine disrupters 48 hexachlorobenzene HCB 48 sulfur trioxide 48 odorless colorless gas 48 radioactive byproducts 47 smog forming gases 47 polybrominated biphenyls 47 respiratory illnesses birth defects 47 PCBs DDT 47 radioactive depleted uranium 47 pesticides flame retardants 47 phosphine gas 47 benzene xylene 47 red sludge 47 triclosan 47 Nitrogen oxides 47 chromium 47 hexane 47 pesticide residue 47 fluorotelomer 47 Brominated 47 Polluted runoff 47 silica dust 47 azo dyes 47 diphenyl ethers 47 inert ingredients 47 PVC polyvinyl chloride 47 organophosphate insecticide 47 bioaccumulate 47 Synthetic fertilizers 47 chlorofluorocarbons CFCs 47 sodium hydrochloride 47 benzene nitrobenzene 47 e coli bacteria 47 ozone depleting substance 47 unlabeled containers 47 chemical methyl isocyanate 47 xylenes 47 contaminated soils 47 PBDE contamination 47 HAAs 47 benzene compounds 47 emit pollutants 47 deplete ozone 47 aromatic amines 47 nonylphenol 47 dichloroethylene 47 household detergents 47 PBDE chemicals 47 PCB polychlorinated biphenyls 47 poisonous gases 47 retardants 47 harmful bacteria 47 disinfection byproducts DBPs 47 pollutions 47 carbon disulfide 47 airborne particulate matter 47 phosphor powder 47 TTHMs 47 oceanic pollutants 47 dental amalgams 47 toxic mercury vapor 47 potent neurotoxins 47 acrolein 47 hydraulic fracturing fluids 47 outgas 47 airborne contaminants 47 poisonous carbon monoxide 47 toxicity 47 diesel particulates 47 Athabasca watershed 47 hydrogen sulphide 47 chloride 47 brominated flame 47 combustion byproducts 47 E. Coli bacteria 47 DBPs 47 carcinogen hexavalent chromium 47 nonylphenol ethoxylates 47 Particulates 47 fracking fluid 47 landfills 47 inject slurry 47 hormone disruptor 47 salts 47 Dioxin 47 ozone depleting substances 47 arsenic cadmium mercury 47 soot smog 47 Airplanes sprayed 47 vinyl shower curtains 47 chlordane 47 flame retardant additives 47 chlorine disinfectant 47 polyvinyl chlorides 47 phosphogypsum 47 bismuth oxychloride 47 tributyltin TBT 47 dishwasher detergents 47 oxidized mercury 47 industrial effluents 47 plasticizers 47 genotoxic substance 47 childrens toys 47 ammonia nitrogen 47 Household cleaners 47 pathogenic microbes 47 insecticides pesticides 47 biohazardous waste 47 Sulphur dioxide 47 sodium hydroxide 47 phosphates nitrates 47 #,# dichloroethane 47 Radioactive substances 47 organochlorine pesticide 47 contaminate 47 uncontrolled hazardous waste 47 inflammable substances 47 radiological contamination 47 methyl isocyanate 46 engineered nanoparticles 46 benzene toluene ethylbenzene 46 Trichloroethylene 46 dyes insecticides 46 bioaerosol 46 tritium 46 toluene solvent 46 PBTs 46 americium 46 Radioactive contamination 46 perchlorethylene toxic 46 sulfur compounds 46 particulate soot 46 contaminate groundwater 46 fluorides 46 Greenhouse gasses 46 brominated 46 Carbofuran 46 TCE vapors 46 synthetic fragrances 46 pesticide aldicarb 46 rat poisons 46 radioactive radium 46 mercury emitted 46 allyl alcohol 46 pesticides herbicides 46 arsenic barium 46 methyl ethyl ketone 46 biogenic amines occur 46 Serum phosphorus 46 endocrine disrupter 46 trigger allergic reactions 46 Phosgene 46 gender bending chemicals 46 hormone mimicking 46 microbiological contamination 46 2 ethylhexyl phthalate 46 asbestosis lung cancer 46 sludge 46 hydrochloric acid 46 lawn fertilizers 46 chlordecone 46 Persistent Organic Pollutants 46 stain repellents 46 harmful particulates 46 Teflon cookware 46 benzene formaldehyde 46 Inert ingredients 46 posed choking hazard 46 organic solvents 46 allergens irritants 46 sulfur gasses 46 depleted uranium weaponry 46 toxic alkaloids 46 chlorobenzene 46 brominated compounds 46 Hydrochloric 46 polluting waterways 46 Shiranui Sea 46 mercury dental fillings 46 contrast chlorine disinfection 46 corrosive gases 46 pathogens 46 bacteria 46 unlined landfills 46 polycyclic aromatic hydrocarbons PAH 46 acid PFOA 46 tertiary butyl ether MTBE 46 DDVP 46 potent carcinogens 46 pesticide endosulfan 46 barium chromium 46 listeria monocytogenes bacteria 46 mercury contamination 46 probable carcinogens 46 ozone particulate matter 46 noxious 46 VOC emissions 46 Dieldrin 46 contaminated sediments 46 naturally occurring radioactive 46 chlorinated Tris 46 toxins leaching 46 reproductive toxicity 46 hormonally active 46 nonhazardous waste 46 containing triclosan 46 raw untreated sewage 46 nitrogen oxides carbon monoxide 46 flammables 46 MtBE 46 Carbon tetrachloride 46 Methomyl 46 ammonia 46 Hydrogen Cyanide 46 Carol Kraege 46 gaseous byproducts 46 chemical flame retardants 46 semicarbazide 46 dichloroethene 46 Toxic Release Inventory 46 Contaminants 46 fracking fluids 46 radioactive contamination 46 BSE prions 46 chloramine 46 flammable 46 nondetectable 46 polluting 46 HealthyToys.org 46 methylmercury 46 Sulfuric acid 46 fecal coliform bacteria 46 chemcials 46 chlorine atoms 46 Fine particulates 46 air toxics 46 nanosilver 46 mutagens 46 carbon dioxides 46 environmentally hazardous substances 46 Nitrosamines 46 harmful pathogens 46 hazardous waste disposal 46 flammable methane 46 microbial contaminants 46 lung irritant 46 charcoal filters 46 BPA phthalates 46 Odours 46 unhealthy trans fatty 46 invisible odorless tasteless 46 hydrocyanic acid 46 calcium sulfate component 46 poison gases 46 ozone depleting chlorofluorocarbons 45 additives 45 polychlorinated 45 synthetic pesticides 45 butter flavorings 45 phthalate DINP 45 arsenic contaminated 45 deca BDEs 45 azinphos methyl 45 radium 45 Perchloroethylene 45 hydrogen chloride 45 environmentally harmful 45 Muriatic acid 45 untreated effluents 45 mercury chromium cadmium 45 gaseous pollutants 45 chromium polybrominated biphenyl PBB 45 acidifying 45 dishwashing powder 45 Chlorine dioxide 45 respiratory irritant 45 ethyl mesilate 45 sulfuric acid caustic soda 45 atrazine herbicide 45 inhaled ingested 45 tutin 45 Mike Shriberg 45 calcium hypochlorite 45 ethylbenzene 45 fungi spores 45 paints solvents pesticides 45 phosgene 45 Substances 45 aquatic toxicity 45 radiactive 45 flammable substances 45 inorganic substances 45 Untreated sewage 45 estrogen mimicking 45 sulfer 45 pollute rivers 45 embalming fluids 45 haloacetic acids 45 pathogenic organisms 45 inorganic mercury 45 halon 45 preservative sulfur dioxide 45 Sodium dichromate 45 nanoproducts 45 oily wastes 45 dichloroethane 45 polluted stormwater 45 VOCs volatile organic compounds 45 ultrafine particles 45 pesticide poisonings 45 organotin 45 Parabens 45 polyvinyl chloride 45 tire crumb 45 organochlorine 45 ozone pollutant 45 thirdhand smoke 45 electromagnetic fields EMFs 45 fracking chemicals 45 fumigants 45 engineers AIChE SmartBrief 45 fuel additive MTBE 45 solvent toluene 45 particulate contaminants 45 toxic propellants 45 poisonous fumes 45 trihalomethane 45 Bayou Verdine 45 dioxin laced 45 radioactive wastes 45 chloroprene 45 degreasing agent 45 sulfuric compounds 45 barium cadmium 45 ethylene dibromide 45 fluorinated gases 45 E coli bacteria 45 Counterfeit cigarettes 45 groundwater contamination 45 fine particulates 45 nitric acids 45 hydrocarbons carbon monoxide 45 leach toxins 45 dioxin TCDD 45 toxic solvent perchlorethylene 45 VOCs volatile 45 briny wastewater 45 wastewater effluent 45 Fecal bacteria 45 additive MTBE 45 ecologically sensitive wetlands 45 environmental toxicants 45 n hexane 45 ozone depleting gases 45 contaminates groundwater 45 Benzo pyrene 45 naphthenic acids 45 Toxic fumes 45 hydrogen cyanide HCN 45 pesticides aldrin 45 chemical additives 45 herbicide Agent Orange 45 chemically contaminated 45 pesticide contamination 45 Pesticide residues 45 Sodium fluoride 45 Contaminated soil 45 sodium dichromate 45 hazards 45 chromium compounds 45 sulfolane 45 Perfluorinated chemicals 45 organophosphate insecticides 45 Trihalomethanes 45 nonstick substance 45 plastics fibers 45 Air fresheners 45 rotten egg smelling 45 pollutant discharge 45 putrid odors 45 particulate matter soot 45 chromated copper arsenate 45 endocrine disruptor 45 disinfectant byproducts 45 naturally occurring radioactivity 45 diesel particulate matter 45 genetically engineered organisms 45 hexavalent chrome 45 dieldrin 45 drilling muds 45 transuranic wastes 45 aerosolize 45 Corexit dispersant 45 photochemical smog 45 urine faeces 45 carbamate insecticides 45 contaminating 45 radioactive cesium 45 endocrine disrupting 45 dishwashing detergents 45 octa BDE 45 controversial chemical bisphenol 45 clogging waterways 45 pollute 45 sulfuric acids 45 acids 45 nerve toxin 45 fine particulate pollution 45 crystalline silica dust 45 Polybrominated 45 ultra violet radiation 45 compressed gasses 45 dibutyl phthalate DBP 45 swallowed inhaled 45 Pesticides 45 allergenic proteins 45 VOC Volatile Organic Compounds 45 Annex XIV 45 chlorinated hydrocarbon 45 bromate 45 pesticide methyl bromide 45 hydrogen sulfide gases 45 haloacetic acid 45 phthalate plasticizers 45 gasses 45 noxious gasses 45 perfluorooctanoate PFOA 45 Pyrethrins 45 chlorinated solvent 45 naturally occurring asbestos 45 fumes 45 paint removers 45 inorganic salts 45 paints inks 45 aluminum phosphide 45 releasing toxic fumes 45 distributing charm bracelets 45 hydrogen sulfide fumes 45 deca bromine 45 nitrogenous compounds 44 manganese smelter 44 cesium 44 obnoxious odors 44 purines 44 vermiculite insulation 44 acids alkalis 44 mercury arsenic cadmium 44 addictive nicotine 44 National Pollutant Release 44 polychlorinated biphenyls PCB 44 Flea collars 44 wastewater effluents 44 carbon monoxide 44 amalgam dental fillings 44 Secondhand smoke contains 44 fireproofing chemicals 44 Ethylene oxide 44 pollute groundwater 44 chromium arsenic 44 chemical histamine 44 aerosol sprays 44 Sodium Hydroxide 44 adulterants 44 leaching toxins 44 VX hydrolyzate 44 cargo sweepings 44 bioaccumulates 44 formaldehyde 44 ROHS directive 44 degrease metal parts 44 etchant 44 Improperly disposed 44 dyes preservatives 44 radio nuclides 44 phosphorus pollution 44 Hexavalent Chromium 44 xylene 44 mercury thermostats 44 contaminate drinking 44 waste decomposes 44 persulfate 44 insecticides herbicides 44 fecal chloroform 44 electromagnetic radiation EMR 44 pesticides fertilizers 44 dichlorobenzene 44 ionic air purifiers 44 nitrofuran 44 leaking septic tanks 44 nonradioactive 44 petroleum hydrocarbons 44 Chloramines 44 compounds metabolize lipid 44 pesticide carbofuran