Conditions for Active Air Quality Permits to Install Issued since 1997

Contact: See Below
Agency: Environment, Great Lakes, and Energy

All Permit to Install (PTI) conditions are in Adobe Acrobat format (PDF). If you do not have the Adobe Acrobat® Reader, you may download the Reader free of charge.

The list of companies holding active PTIs is sorted by:



  • The list is updated every Monday morning (or the first workday after a Monday State holiday) by approx. 10:15 AM Eastern Time.
  • You can use your browser's search function to find a particular PTI. On most browsers, it will be in your menu, e.g. EDIT > FIND; or type CTRL+F.
  • Some of the PTIs on the list above are General Permits to Install for specific categories. For more information, visit New Source Review General Permits.
  • There are a few reasons why you may not find a PTI in the list.
    • It may have been approved prior to the year 1997.
    • It may still be under review. Check the list of Pending PTI Applications.
    • It may have been voided and is no longer active.
    • It may have been voided and "rolled into" a Renewable Operating Permit (ROP). For a list of ROPs in Michigan, visit ROP Source List and Permit Documents.
  • If you are interested in information such as stack test report executive summaries, enforcement documents, inspection reports, violation notices (including for dry cleaning and asbestos), and responses to violation notices, please visit the Air Quality Source Information web page.



  • Please contact Christine Klaver at 517-284-6793 if you have trouble finding a PTI.
  • If you would like information about approved PTIs, or if you need information not shown on the lists above, send a Freedom of Information Act (FOIA) request by visiting the EGLE FOIA Information Page.