- Skip Navigation

Note: This message is displayed if (1) your browser is not standards-compliant or (2) you have you disabled CSS. Read our Policies for more information.

  • Business & Agriculture
  • Residents
  • Government
  • Education
  • Taxes & Finance
  • Visiting & Playing
  • Family & Health

Indiana Department of Environmental Management

Indiana Department of Environmental Management

Air Quality in Indiana > Attainment > Attainment Demonstrations > Ozone Attainment Demonstrations Ozone Attainment Demonstrations

This page is dedicated to Indiana's Ozone attainment demonstrations for counties that did not meet the National Ambient Air Quality Standards (NAAQS) at the time designations were made. As required by Clean Air Act (CAA) Title I, Part D, Subpart 1, Section 172, the Indiana Department of Environmental Management (IDEM) has prepared these attainment demonstrations for U.S. Environmental Protection Agency (U.S. EPA) review.

Dearborn County

1997 8-hour Ozone Standard

Lake and Porter Counties

2008 8-hour Ozone Standard
1997 8-hour Ozone Standard

SmogWatch Alerts

Get the latest emails or SMS texts as they happen

Public Notices Air Toxics Monitoring