Data are for the U.S.
- Percent of nonsmokers 3 years of age and over who were exposed to secondhand tobacco smoke: 40% (2007-2008)
- Percent of children 1-5 years of age with elevated blood lead levels (greater than or equal to 5 µg/dL): 2.6% (2007-2010)
Source: Key statistics from NHANES
- Blood lead and mercury levels in pregnant women in the United States, 2003-2008 [PDF – 624 KB]
- Environmental Tobacco Smoke Exposure in Children Aged 3‒19 Years With and Without Asthma in the United States, 1999‒2010
- Key statistics from NHANES
- National Report on Human Exposure to Environmental Chemicals