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 This website is no longer updated and links to external websites and some internal pages may not work.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

Clean Water Act Analytical Methods

Contaminants of Emerging Concern - Methods Documents

Not Approved Under 40 CFR Part 136

  • Pharmaceuticals and Personal Care Products (PPCPs) methods (1694, 1698)
  • Other new methods (1614, 1699)
Although the following methods are not in EPA regulations, they may be of interest to regulated entities, permitting authorities, and the public. The presence of a method here does not imply a regulatory requirement for its use.

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