How often does EPA update the total chromium drinking water standard?

As mandated by the Safe Drinking Water Act, EPA regularly reviews drinking water standards to make sure they are up to date with the best available science. When new peer-reviewed data become available (like the 2008 cancer studies by the National Toxicology Program), EPA reviews that, along with other information, to determine whether the drinking water standard needs to be updated to better protect human health. EPA is currently in the process of conducting a human health assessment for chromium-6.

For more information on chromium, please visit our Web site at the following URL: 

http://water.epa.gov/drink/contaminants/basicinformation/chromium.cfm