An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »


Federal Community of Practice for Crowdsourcing and Citizen Science

The Federal Community of Practice on Crowdsourcing and Citizen Science website is now hosted by the U.S. General Services Administration on DigitalGov. Visit the new site.