"Average concentration of mercury in blood in people living in Canada, by age group, 1 Cycle 1 (2007 to 2009) to Cycle 7 (2023 to 2024)",,,,,,, ,,,,,,, Survey period,1 to 2 years (micrograms per litre),3 to 5 years (micrograms per litre),6 to 11 years (micrograms per litre),12 to 19 years (micrograms per litre),20 to 39 years (micrograms per litre),40 to 59 years (micrograms per litre),60 to 79 years (micrograms per litre) "Cycle 1 (2007 to 2009)",n/a,n/a,0.27,0.31,0.65,1,0.87 "Cycle 2 (2009 to 2011)",n/a,0.27,0.28,0.27,0.64,1,1.1 "Cycle 3 (2012 to 2013)",n/a,n/c,n/c,n/c,0.82,0.96,1 "Cycle 4 (2014 to 2015)",n/a,n/c,n/c,n/c,n/c,0.77,0.88 "Cycle 5 (2016 to 2017)",n/a,n/c,n/a,0.33,0.55,0.86,0.83 "Cycle 6 (2018 to 2019)",n/a,0.32,0.36,0.44,0.74,0.84,0.95 "Cycle 7 (2023 to 2024)",n/c,n/c,n/c,n/c,0.45,0.54,0.59 ,,,,,,, Note: n/a = not available; n/c = not calculated. Average refers to geometric mean. Averages for some age groups are not presented as the age groups were not included in a cycle (n/a) or geometric means could not be calculated (n/c) as more than 40% of the samples were below the limit of detection. Mercury is shown as total mercury (organic and inorganic).,,,,,,, Source: Health Canada (2026b) Canadian Biomonitoring Dashboard (https://health-infobase.canada.ca/biomonitoring/).,,,,,,, Available on the Environmental indicators website (www.canada.ca/environmental-indicators).,,,,,,,