Columbia River
Section 123 of the Clean Water Act was the first legislation to officially designate the national importance of restoration efforts in the Columbia River Basin. Learn more about EPA's role and the work we're doing in the Basin.
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, 2025. This website is no longer updated and links to external websites and some internal pages may not work. More information »