Health Canada
Symbol of the Government of Canada

Common menu bar links

Environmental and Workplace Health

Description - Figure F2 - Burden of illness for drinking water without treatment (i.e., raw water)

A bar graph showing the burden of illness in DALYs per person per year from consumption of untreated river water. The burden of illness is shown for each of 5 pathogens (Cryptosporidium, Giardia, rotavirus, Campylobacter, E. coli O157:H7) and for the total burden of illness from these pathogens combined. The x-axis of the graph is labelled with the 5 pathogens and the pathogen total. The y-axis of the graph is the annual DALY risk in DALYs per person per year. It is presented on a logarithmic scale and the axis values range from 10-15 to 10. The reference level of risk of 10-6 DALYs per person per year is illustrated on the graph as a dotted horizontal line. The vertical bars extend approximately to: 10-3 for Cryptosporidium; 10-3 for Giardia; 10-1 for rotavirus; 10-1 for Campylobacter, 1 for E. coli O157:H7; and for the total of these pathogens combined, slightly higher than 1 DALY per person per year.