Related by context. Frequent words. (Click for all words.) 61 nitrification 61 mg l 61 Turbidity 61 soils 61 nitrate 60 THMs 60 total dissolved solids 59 arsenic concentrations 59 dissolved solids 59 dieldrin 58 nitrogen phosphorus 58 disinfection byproducts 58 carbon tetrachloride 58 nutrient 58 ammonia nitrogen 57 Aflatoxin 57 Nitrates 57 alkalinity 56 salinity 56 nutrient runoff 56 Nitrate 56 sorption 56 nutrient loading 56 phosphorus 56 nitrogen 56 nitrates 56 Contaminant 56 furan 56 chlordane 56 herbicides pesticides 56 acidic soils 56 groundwater aquifers 56 benzo pyrene 56 livestock manure 55 acute toxicity 55 dissolved oxygen levels 55 phytate 55 nitrogen phosphorous 55 fecal coliform bacteria 55 inorganic arsenic 55 aflatoxins 55 coliforms 55 Sulfate 55 phosphorous 55 effluent discharge 55 exceedance 54 sewage effluent 54 manures 54 selenium 54 sulphate 54 Hydrogen sulfide 54 bioaccumulation 54 methyl mercury 54 harmful contaminants 54 ammonium sulfate 54 #ppm [002] 54 contaminants 54 Salinity 54 PCBs polychlorinated biphenyls 54 sludges 54 DBPs 54 groundwater 53 shallow aquifer 53 leachable 53 arsenic 53 nutrient absorption 53 nitrogen fertilizers 53 mycotoxin 53 Residues 53 enterococcus 53 iodide 53 diazinon 53 salination 53 vomitoxin 53 serum calcium 53 sulfate 53 sandy soils 53 acidifying 53 soil pH 53 total coliform 53 Nutrient 53 chlorothalonil 53 betaine 53 fecal coliform 53 pesticide residues 52 purine 52 Paraquat 52 iron manganese 52 turbidity 52 Leaching 52 Kuan Yin Taiwan 52 elemental sulfur 52 oxalic acid 52 sulphates 52 phosphine 52 Nutrients 52 petroleum hydrocarbons 52 contaminant 52 fecal bacteria 52 sediment 52 pH