AWWA WQTC71654

This powerpoint presentation begins by providing a brief overview of Ottawa's water supply system. Key calculation steps for quantitative microbial risk assessment (QMRA) are presented, along with the Health Canada QMRA Model, the primary estimates produced by the model; the probability that a microbial pathogen will pass from source water to tap; the probability of infection, given a dose of pathogens ingested (human feeding studies); measuring the human impact of illness; quantifying risks from microbial pathogens, a case study with the City of Ottawa that applied the QMRA model, and advantages and challenges of using a QMRA model. Includes tables, figures.