Your Civil+ free trial is ending soon
Click Free Trial in the task bar for more info.
Your Civil+ free trial is active
The subscription will auto-renew on {{insert end date}}. To manage your subscription, visit the Customer Portal.

Working on it...

We're working on the mobile experience for this page right now.

Thank you for your patience!

- Civil Team

Back to Home
Climate Change

Federal Clean Air Act

In 1970, President Nixon signed the Clean Air Act, significantly expanding the federal government’s role in combating air pollution.


On Earth Day in 1970, Congress passed the Clean Air Act (CAA), resulting in a significant increase in the federal government’s role in air pollution control. This legislation authorized four major regulatory programs: 

  1. The National Ambient Air Quality Standards (NAAQS)
  2. State Implementation Plans (SIPs)
  3. New Source Performance Standards (NSPS)
  4. National Emission Standards for Hazardous Air Pollutants (NESHAPs). 

Later that year, on December 2, 1970, President Nixon signed an executive order creating the EPA to enforce the CAA and other environmental protection laws.