Related by context. Frequent words. (Click for all words.) 75 coliforms 71 fecal coliform 69 fecal coliform bacteria 68 coliform 67 enterococci 67 fecal bacteria 64 coliform bacteria 63 fecal contamination 60 mg l 59 contaminants 59 tetrachlorethylene 58 coli 58 turbidity 58 e coli 57 cryptosporidium 57 contaminant 57 Legionella bacteria 57 E coli 56 exceedances 56 E.coli 56 total dissolved solids 55 Contaminants 55 E. coli 55 e.coli 55 bacterial contamination 55 E. coli bacteria 54 E Coli 54 E. Coli 54 harmful contaminants 54 faecal 54 outfalls 54 Cryptosporidium 54 E.coli bacteria 54 #,# dioxane 54 maximum contaminant 53 nitrates 53 harmful pathogens 53 bacteria 53 arsenic 53 arsenic mercury 53 Nitrates 53 polychlorinated biphenyls PCBs 53 fecal matter 52 per milliliter 52 bacteriological 52 dissolved solids 52 faecal matter 52 contamination 52 bacterial 52 pesticide residues 52 methyl mercury 52 legionella 52 dissolved oxygen 52 trihalomethanes 52 suspected carcinogen 51 microbial contamination 51 suspended solids 51 ppb 51 alkalinity 51 PFOS 51 malachite green 51 dissolved oxygen levels 51 bromate 51 Aspergillus 51 Giardia 50 E.Coli 50 Disinfection 50 becquerels 50 Soil samples 50 nanograms per 50 Sulfate 50 giardia 50 industrial effluents 50 cryptosporidiosis 50 Concentrations 50 fecal 50 concentrations 50 contaminated 50 arsenic contamination 50 effluent 50 Legionella 49 toxin 49 Staphylococcus 49 harmful bacteria 49 sewage discharges 49 Effluent 49 pesticide residue 49 furans 49 picocuries per 49 chloramines 49 nitrate 49 chlorinated 49 radioactive cesium 49 chloramine 49 pollutants 49 dischargers 49 groundwater 49 microbiological 49 trace amounts 49 radioactive iodine 48 chlorides