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 This website is no longer updated and links to external websites and some internal pages may not work.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 »

Fact Sheet on Evapotranspiration Cover Systems for Waste Containment

View Alternative Landfill Cover Project Profiles  Exit

This Fact Sheet updates the 2003 Fact Sheet on Evapotranspiration Covers and provides information on the regulatory setting for ET covers, general considerations in their design, performance, and monitoring, and status at the time of writing (2011). Also several examples with supporting performance data are provided, as well as a list of sites that have proposed, approved, and installed ET covers. This document can also be accessed at

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.