Surveillance of waterborne diseases.
D003430:Cross-Sectional Studies; D004196:Disease Outbreaks; D004739:England / Q000453:epidemiology; D004751:Enteritis / Q000453:epidemiology* / Q000517:prevention & control; D006801:Humans; D015994:Incidence; D011159:Population Surveillance; D014871:Water Microbiology