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 This website is no longer updated and links to external websites and some internal pages may not work.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

Find a Water Laboratory Method

Selected Analytical Methods for Environmental Remediation and Recovery

EPA’s National Homeland Security Research Center’s “Selected Analytical Methods for Environmental Remediation and Recovery” (SAM) contains methods that laboratories should use when analyzing environmental samples for a homeland security event.

Online query for SAM to find chemical, radiochemical and biotoxin method
PDF version of SAM to find pathogen methods in addition to chemical, radiochemical and biotoxin methods
SAM updates