Related by context. Frequent words. (Click for all words.) 62 faecal 62 coliforms 61 enterococcus 59 E coli bacteria 59 enterococci 57 fecal bacteria 55 total coliform 54 mg l 54 coliform 54 inorganic arsenic 54 legionella bacteria 54 e coli 54 E Coli 53 fecal coliform bacteria 53 E.coli 53 dieldrin 53 E.coli bacteria 53 fecal coliform 53 cryptosporidium 53 coliform bacteria 53 fecal contamination 52 E coli 52 faecal matter 51 e.coli 51 methyl mercury 51 E.Coli 50 microgrammes 50 chlordane 50 salmonella enteritidis 50 Soil samples 50 tetrachlorethylene 50 staphylococcus aureus 50 milligrammes 50 picocuries 49 legionella 49 coli 49 bacteria 49 Microbiological 49 hydrogen sulphide 49 #mcg [003] 49 intestinal infections 49 #mls [002] 49 E. coli bacteria 49 bacterial contamination 49 giardia 49 acute toxicity 49 carbon tetrachloride 48 Klebsiella 48 campylobacter 48 heavily polluted 48 nitrobenzene 48 nanograms per 48 organophosphate pesticides 48 pesticide residues 48 sewage effluent 47 contaminants 47 bromate 47 Hydrogen sulfide 47 C.difficile 47 algal bloom 47 carcinogenic chemicals 47 faeces 47 #.#mg [004] 47 contaminated 47 pesticide residue 47 vaginal secretions 47 arsenic 47 Tissue samples 47 cotinine levels 47 PAHs 46 polycyclic aromatic hydrocarbons PAHs 46 nmol L 46 nasal swabs 46 thyroid glands 46 nitrates 46 per decilitre 46 bilharzia 46 Enterovirus 46 arsenic mercury 46 alkaline phosphatase 46 detectible 46 E. coli 46 Nitrates 46 serum calcium 46 pg ml 46 nitrogen dioxide 46 milliliters 46 effluent 46 legionnaires disease 46 trichlorethylene TCE 46 exceedances 46 #mg/kg [002] 46 acrolein 46 H. pylori 46 oesophageal cancer 46 Salmonella Typhimurium 45 contaminant 45 HPV# 45 microbiological 45 Chlamydia 45 alkalinity