An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.
The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.
Internet Explorer is no longer a supported browser.
This website may not display properly with Internet Explorer. For the best experience, please use a more recent browser such as the latest versions of Google Chrome, Microsoft Edge, and/or Mozilla Firefox. Thank you.
COVID-19 is an emerging, rapidly evolving situation.
Nigra AE, Sanchez TR, Nachman KE, Harvey DE, Chillrud SN, Graziano JH, Navas-Acien A. 2017. The effect of the Environmental Protection Agency maximum contaminant level on arsenic exposure in the USA from 2003 to 2014: an analysis of the National Health and Nutrition Examination Survey (NHANES). Lancet Public Health 2:e513-e521. doi:10.1016/s2468-2667(17)30195-0PMID:29250608PMCID:PMC5729579
