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 This website is no longer updated and links to external websites and some internal pages may not work.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

Update Your Member Lab Compendium Data

EPA's Compendium of Environmental Testing Laboratories (Laboratory Compendium) is a limited-access online database of environmental laboratories nationwide. It is available to EPA; federal, state, and local emergency responders; laboratory personnel; and water utilities. The database contains each laboratory's specific capabilities to analyze chemical, biological, and radiological contaminants.

All laboratories accepted into the ERLN are required to register and maintain a laboratory record in the EPA Laboratory Compendium. Emergency responders across the country use the Laboratory Compendium to identify and access labs that meet the needs of a specific response effort. ERLN members will be identified so that responders know to expect consistency and high quality data.

To access the Laboratory Compendium, please visit the EPA Lab Compendium website.