"Percent change in the average concentrations of selected substances in people living in Canada, Cycle 1 (2007 to 2009) to Cycle 7 (2023 to 2024)",,,, ,,,, Survey period,Mercury in blood (percentage change from Cycle 1),Lead in blood (percentage change from Cycle 1),Cadmium in blood (percentage change from Cycle 1),Bisphenol A in urine (percentage change from Cycle 1) Cycle 1 (2007 to 2009),0,0,0,0 Cycle 2 (2009 to 2011),3,-8,-4,0 Cycle 3 (2012 to 2013),n/c,-15,4,-8 Cycle 4 (2014 to 2015),n/c,-26,-4,-24 Cycle 5 (2016 to 2017),-14,-31,-13,-39 Cycle 6 (2018 to 2019),1,-37,-8,-43 Cycle 7 (2023 to 2024),-36,-44,-17,-63 ,,,, ,,,, "Average concentrations of selected substances in people living in Canada, Cycle 1 (2007 to 2009) to Cycle 7 (2023 to 2024)",,,, ,,,, Survey period,Mercury in blood (micrograms per litre),Lead in blood (micrograms per litre),Cadmium in blood (micrograms per litre),Bisphenol A in urine (micrograms per litre) Cycle 1 (2007 to 2009),0.72,1.3,0.24,1.2 Cycle 2 (2009 to 2011),0.74,1.2,0.23,1.2 Cycle 3 (2012 to 2013),n/c,1.1,0.25,1.1 Cycle 4 (2014 to 2015),n/c,1,0.23,0.91 Cycle 5 (2016 to 2017),0.62,0.9,0.21,0.73 Cycle 6 (2018 to 2019),0.73,0.8,0.22,0.68 Cycle 7 (2023 to 2024),0.46,0.7,0.2,0.44 ,,,, ,,,, "Note: n/c = not calculated. The first table presents the percentage change in the average (geometric mean) concentrations of selected substances in people living in Canada relative to Cycle 1 (2007 to 2009). Percent changes were not calculated for some cycles where geometric mean concentrations are not available. The second table presents the average (geometric mean) concentrations of selected substances in people living in Canada. The concentrations of mercury and lead in blood and bisphenol A in urine are from participants aged 6 to 79 years and cadmium in blood in people who do not smoke are from participants aged 12 to 79 years. Averages for lead, mercury and bisphenol A do not include children under the age of 6 years as they were not included in the Cycle 1 survey. Some averages are not calculated due to poor detection affecting the ability to calculate geometric means for the total population (i.e. more than 40% of samples were below the limit of detection). The averages presented were calculated using the most conservative limit of detection across cycles to enable meaningful comparisons and evaluation of statistical trends.",,,, Source: Health Canada (2026a) Cadmium in people living in Canada (https://www.canada.ca/en/health-canada/services/environmental-workplace-health/reports-publications/environmental-contaminants/human-biomonitoring-resources/cadmium-people-living-canada.html). Health Canada (2026c) Lead in people living in Canada (https://www.canada.ca/en/health-canada/services/environmental-workplace-health/reports-publications/environmental-contaminants/human-biomonitoring-resources/lead-people-living-canada.html). Health Canada (2026d) Mercury in people living in Canada (https://www.canada.ca/en/health-canada/services/environmental-workplace-health/reports-publications/environmental-contaminants/human-biomonitoring-resources/mercury-people-living-canada.html). Health Canada (2026e) Communication from Population Studies Division. ,,,, Available on the Environmental indicators website (www.canada.ca/environmental-indicators).,,,,