Recreational Water Quality and Health. ENVR 890 Mark D. Sobsey Spring, 2007. Health Risks from Recreational Water. What are the health risks from recreational water and how important are microbial risks? Health risks: Microbial or infectious disease risks
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Mark D. Sobsey
• Grade beaches to support informed personal choice
• Provide on-site guidance to users on relative safety;
• Assist in identifying and promoting effective management interventions
• Provide an assessment of regulatory compliance.
Probability of illness p/(1-p)
Case rate /1000
Bacterial count /100ml (geometric mean or median)
Swimming associated case rate /1000
Probability of illness, p/(1-p)
Swimming associated case rate/1000
Odds of ill
Viruses and Physical Parameters