Related by context. Frequent words. (Click for all words.) 61 cryptosporidium 51 measles outbreak 49 E.coli 48 E coli 45 sewage spills 45 outbreak 44 e coli 43 E. coli 43 bacterial contamination 42 mosquito borne virus 42 toxic algae 42 Legionnaires disease 42 E. coli contamination 41 outbreaks 41 norovirus 41 West Nile virus 41 whooping cough 41 gastrointestinal illness 40 E. coli infection 40 West Nile 40 sewage overflows 40 drownings 40 algae bloom 40 contaminated 40 contamination 40 C. diff 40 botulism 39 E. Coli 39 gastroenteritis 39 fluoride 39 mumps 39 E. coli outbreak 38 measles 38 chlorination 38 swine flu 38 cholera outbreak 37 borne illness 37 Drinking Water 37 prolonged drought 37 Norovirus 37 drinking 37 poisoning 37 poisonings 37 fluoridation 37 boating accidents 37 salmonella poisoning 37 E. coli bacteria 36 H#N# virus 36 West Nile Virus 36 fluoridated 36 salmonella outbreak 36 cold snap 36 bird flu outbreak 36 H#N# flu 36 flu outbreak 36 C diff 36 sickened 36 MRSA infection 36 salmonella contamination 36 salmonellosis 36 fluoridated water 36 water 36 salmonella 36 WNV 36 bovine TB 36 tainted spinach 35 listeria 35 sewerage 35 campylobacter 35 sewage 35 Whooping cough 35 lakes 35 chlorine 35 flu epidemic 35 acute diarrhea 35 E. coli O# H7 35 H#N# 35 coliform bacteria 35 overdoses 35 snake bites 35 algal blooms 35 Botulism 35 H#N# swine flu 35 didymo 35 leptospirosis 35 meningococcal disease 35 coliform 34 Swine flu 34 fecal bacteria 34 pertussis 34 flooding 34 Groundwater 34 inland lakes 34 Contaminated 34 Swine Flu 34 groundwater 34 H#N# Flu 34 raw milk 34 flu 34 incidents 33 groundwater contamination