Skip to main content

Air Quality Division Permits

close up of hands writing on documents at desk
Environment, Great Lakes, and Energy

Air Quality Division Permits


For a particular program or topic, click its link and view its contact list.

Air pollution sources are evaluated and investigated for compliance with air standards and permit requirements. Here you will find an explanation of the types of permits required by the Michigan Department of Environment, Great Lakes, and Energy (EGLE); forms; and other related information.

The Michigan Air Permit System will be changing to MIEnviro Portal. Find more information on the MIEnviro Portal web page (scroll down to "MiEnviro Portal for Air").

Electronic Documents Submission

The Air Quality Division (AQD) continues to review, tailor, and amend processes to assist companies in submitting information in an easy and timely manner.  We will continue to require the submittal of signed hard copies of documents, but we will accept electronic submittals as the official receipt date.  Facilities may continue to submit information electronically and mail the signed hard copies to the appropriate unit or district office.  Those choosing to submit electronically, should follow the guidance linked below.

AQD Electronic Documents Submission

Permit Spotlight

A hand holding a pen and signing a document

Rule 225 Variance Document

The purpose of this document has been incorporated into Rule 226(f) and is, therefore, no longer necessary. Please refer to Rule 336.1226(f) of the Air Pollution Control Rules.

SESC training graphic


Upcoming Permit to Install (PTI) and Renewable Operating Permit (ROP) workshops can be found in the EGLE Events and Training page.

Michigan Air Permit System

Permits to Install (PTI) / New Source Review (NSR)

Rule 201 of the Michigan Air Pollution Control Rules requires a person to obtain an approved Permit to Install for any potential source of air pollution unless the source is exempt from the permitting process. Does your business have paint or other coating application booths, storage tanks, printing presses, boilers, soil remediation projects, plating operations, degreasers, ovens, or any other process that may emit air pollution? If so, your facility may need to complete an Air Use Permit application.

Renewable Operating Permits (ROP) / Title V

The operating permits program is a national permitting system, administered by each state. It is required by Title V of the Federal Clean Air Act of 1990. In Michigan, these permits are known as "renewable operating permits." They are often referred to as "ROPs" or "RO Permits." Each "major source" is subject to the program. A "major source" is a facility that is capable of emitting more than certain amounts of air contaminants. The goal is to ensure that source operators know what air pollution control requirements apply to them. The public will also be better informed about what is required of sources of pollution in their neighborhoods.

Cross-State Air Pollution Rule (CSAPR)

CSAPR replaced EPA's 2005 Clean Air Interstate Rule (CAIR), following the direction of a 2008 court decision that required EPA to issue a replacement regulation. CSAPR regulates annual emissions of NOx and SO2 as well as NOx emissions during the ozone season (May 1 through September 30) from subject electric generating units (EGUs). CSAPR implementation began on January 1, 2015.

Acid Rain Permits (Title IV)

Electric generating units (EGUs) which sell electricity to the grid and burn fossil fuel may be required to obtain and operate in compliance with a Phase II acid rain permit, pursuant to Title IV of the federal Clean Air Act. Those EGUs that have a nameplate capacity of less than 25 MW and burn a fuel with an annual average sulfur content of less than 0.05% are exempt from Title IV. The Michigan Department of Environment, Great Lakes, and Energy (EGLE), Air Quality Division (AQD) is the authority responsible for issuance of Phase II acid rain permits in Michigan. Those units which become subject to Title IV are required to submit an application to the AQD 24 months before the unit commences operation.

MACT Determinations

Under the Clean Air Act, the USEPA is required to develop standards for industrial categories of "major" sources of hazardous air pollutants (HAPs) that require the application of maximum achievable control technology (MACT). Section 112(g) requires a "case-by-case MACT determination" by the Air Quality Division if a major source is constructed or reconstructed before the USEPA issues a MACT regulation for that particular source category. Section 112(j), commonly referred to as the "MACT hammer," requires a case-by-case MACT determination if USEPA fails to promulgate a standard within 18 months after the scheduled date.

Additional Environmental Links of Interest

For program information concerning a specific topic below, click its link and look for a contact person on that page or document.

smoke stacks emitting plumes

Prevention of Significant Deterioration (PSD)

a puzzle piece connects two larger puzzles on either side