Related by context. Frequent words. (Click for all words.) 73 fecal contamination 63 enterococci 63 fecal coliform bacteria 61 fecal coliform 61 fecal bacteria 61 cryptosporidium 60 E.coli 60 algal bloom 59 bacterial contamination 59 E coli 59 faecal 58 e coli 58 contamination 58 coliform 57 microbial contamination 57 turbidity 55 contaminants 55 coliform bacteria 54 E Coli 53 Leptospirosis 53 toxic algae 53 contaminant 52 E. coli 52 Legionella 52 giardia 52 Raw sewage 52 faeces 52 E. coli bacteria 51 Cryptosporidium 51 campylobacter 51 Nitrates 51 raw sewage 51 didymo 51 algal blooms 50 leptospirosis 50 arsenic contamination 50 E. Coli 50 methyl mercury 50 discolouration 50 contaminated 50 coli 50 bacteriological 50 borne diseases 49 effluent 49 dissolved oxygen levels 49 bacteria 49 microbiological 49 E. coli contamination 49 Legionnaire disease 49 sewage overflow 49 Campylobacter 48 spillages 48 disinfection 48 pesticide residues 48 harmful bacteria 48 chlorinated 48 toxin 48 outfalls 48 contaminations 48 gastroenteritis 47 salinity 47 infection 47 spillage 47 domoic acid 47 sewage spills 47 watercourse 47 water borne diseases 47 bacterial 47 hydrogen sulphide 47 Hendra virus 47 fecal matter 47 Contaminants 47 fecal 47 seepage 47 stormwater drains 46 antibiotic resistant bacteria 46 Fitzroy River 46 nitrates 46 diarrheal disease 46 mg l 46 water 46 chlorination 46 outbreaks 46 alkalinity 46 acute diarrhea 46 disinfected 46 bacterial infection 46 catchment 46 nitrate 46 mercury contamination 46 dental decay 46 PAHs 45 toxicity 45 untreated sewage 45 oxygen depletion 45 rivers lakes 45 Contamination 45 norovirus 45 mosquito breeding 45 backflow 45 botulism