Related by context. Frequent words. (Click for all words.) 59 corroded pipes 52 corroded pipe 49 polluted groundwater 49 Poorly maintained 48 hazardous fumes 48 leaky pipes 48 Diesel exhaust 48 decayed teeth 47 corrosion 46 ruptured pipe 46 Toxic chemicals 46 Tooth decay 45 mercury vapors 45 faulty boiler 44 piping 44 Algae blooms 44 leaky faucets 44 leaky 44 silica dust 44 Raw sewage 44 Hydrogen sulfide 44 mold infestation 43 corroded 43 flaking paint 43 carcinogenic chemicals 43 COADE CAESAR II 43 airborne toxins 43 chimney stacks 43 corrosives 43 noxious gases 42 THMs 42 sewage backups 42 shallow aquifer 42 waterborne illnesses 42 oily residue 42 Seepage 42 inhaling toxic fumes 42 rotten egg smell 42 mold infested 42 clogged gutters 42 toxic chemicals 42 sewage pipes 42 Varicose veins 42 foul odors 42 poisonous carbon monoxide 42 rust stains 41 toxic vapors 41 contaminants 41 sewer pipes 41 dental cavities 41 feedwater 41 flame retardant chemicals 41 noxious chemicals 41 leaky pipe 41 harmful contaminants 41 hydrogen sulfide 41 fracturing fluids 41 poisonous fumes 41 methylene chloride 41 contaminating groundwater 41 spalling 41 pigeon droppings 41 water mains 40 rotting wood 40 storage tanks 40 corroding 40 mold mildew 40 pollution 40 pipes 40 watermains 40 Songhua river 40 drafty windows 40 grout 40 hydrofluoric acid 40 PCBs polychlorinated biphenyls 40 trichlorethylene TCE 40 toxins 40 linoleum floors 40 welding rods 40 ammonia 40 plumbing pipes 40 hazardous chemicals 40 skirting boards 39 toxic fumes 39 roadbeds 39 noxious odors 39 sealant 39 toxic algae bloom 39 toxic algae blooms 39 dehumidifying 39 undersea gusher 39 suspected carcinogen 39 solvents 39 plumbing 39 polluted 39 Sulfur dioxide 39 microscopic cracks 39 coughing wheezing 39 contaminated groundwater 39 pipework 39 asbestos contamination