Related by context. Frequent words. (Click for all words.) 58 Songhua 57 Songhua River 55 total dissolved solids 54 benzene 53 ppb 52 mg l 52 radioactive substances 51 contaminant 51 cesium 50 maximum contaminant 50 tritium 50 lakh cusecs 50 hydrogen sulfide 49 turbidity 49 radioactive iodine 49 suspended solids 48 nitric acid 48 red sludge 48 pollutant 48 trihalomethanes 48 contaminants 48 fecal coliform bacteria 48 radioactive cesium 48 suspected carcinogen 47 microgram 47 fecal coliform 47 methyl mercury 47 picocuries per 47 xylene 47 trichlorethylene 47 vinyl chloride 47 radionuclides 46 Sulfur dioxide 46 nanograms per 46 becquerels 46 Pollutants 46 perchlorate 46 radioactive tritium 46 hydrofluoric acid 46 sulphate 46 arsenic 46 fine particulates 46 hydrogen sulphide 46 radionuclide 46 radioactivity 46 #,# dioxane 46 dissolved solids 46 ozone concentrations 46 pollutants 46 furans 46 microsieverts 46 chlorides 46 Benzene 45 ppm 45 sulfate 45 Nitrate 45 chloride 45 dioxin 45 chromium 45 iodine 45 coliform 45 effluents 45 nitrogen dioxide 45 Radioactive iodine 45 pesticide residue 45 alkalinity 45 concentrations 45 polychlorinated biphenyls PCBs 45 particulate matter 45 dioxins 45 hexavalent chromium 45 sulfur dioxide 44 particulate 44 Tangjiashan 44 dissolved oxygen 44 nitrate 44 micrograms 44 Radioactivity 44 trace amounts 44 PAHs 44 chlorine 44 Ambient Air 44 cyanuric acid 44 dissolved oxygen levels 44 radioactive contaminants 43 poisonous substances 43 airborne pollutants 43 thallium 43 Concentrations 43 enterococci 43 particulates 43 PCBs 43 chloramine 43 PFOS 43 ammonium 43 harmful substances 43 impurities 43 toluene 43 PM#.# 43 cubic meter 43 hexane