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 This website is no longer updated and links to external websites and some internal pages may not work.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

Web Standard: Page Not Found (404 Error)


A page that notifies a visitor they have found a broken link.

Content Requirements

  • In the WebCMS, there will be a single 404 error page for the Agency.
  • Applications need a 404 error page.
    • Applications should include on their page not found content:
      • Page title that shows that a person is on a Page not Found page.
      • A way to find information in the application (for example, a search box for the application).
      • A link to the application homepage or application search page.
      • A link to the EPA Homepage in the body of the page.
      • You can add more information if you think it helps the customers find information. 


About this Standard

All EPA public web content must adhere to the EPA Web Standards, the U.S. Web Design System guidelines, and the 21st Century Integrated Digital Experience Act.

Original effective date: 01/01/2004
Last approved on: 03/11/2020
Web Council review by: 03/11/2023 (or earlier if deemed necessary by the Web Council)