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Tools for State Implementation Plan (SIP) Status

EPA works closely with state and local governments as they develop plans to make progress toward improving air quality. This page links to several tools to help the public and state and local governments track progress toward national clean air goals. 

On this page:

Related information


Nonattainment and Maintenance Population Tool

About this tool: 

This tool displays the number of people living in designated nonattainment and maintenance areas for each NAAQS, based on the latest U.S. Census data. It also displays the individual counties in nonattainment and maintenance areas on an interactive map.


Related information

Areas Designated Nonattainment or Maintenance Dashboard

About this dashboard: The Nonattainment and Maintenance Area Dashboard provides information about nonattainment and maintenance areas for current and revoked NAAQS. Information in the dashboard can be filtered by state, NAAQS, area name, area status, area classification, and other fields. When viewing information about a specific area, the history of EPA actions on the area is displayed at the bottom of the page. For more information about a particular nonattainment or maintenance area, please visit the EPA Green Book and the Nonattainment and Maintenance Population Tool (add link)

 See also: Where to find EPA actions on SIP submittals in the Federal Register.



Required State Implementation Plan Elements Dashboard

About this dashboard: This tool provides details about individual states’ Clean Air Act and regulatory planning requirements associated with implementing, attaining, and maintaining the National Ambient Air Quality Standards (NAAQS) through SIPs. The dashboard includes information for nonattainment and maintenance areas for current and revoked NAAQS. Information in the dashboard can be filtered by state, plan category, NAAQS, area, and specific SIP element. For more information about the required SIP elements visit: Air Quality Implementation Plans.

Learn more about nonattainment area requirements:

Learn more about infrastructure area requirements:

See also: Where to find EPA actions on SIP submittals in the Federal Register.