AQD operates a dual permitting system — construction permits and operating permits — to control majorMajor SourceIn general, a source is major if its emissions exceed certain thresholds that are defined in terms of tons per year. For example, under Title V of the Clean Air Act, any source that emits or has the potential to emit 100 tons per year or more of any criteria air pollutant is a major source and must obtain a Title V operating permit. (OAC 252:100-8-2) and minorMinor SourceA minor facility is a facility which is not classified as a major facility and therefore is not subject to the 40 CFR Part 70 permitting program under Title V of the Clean Air Act. sources of air pollution.

• A construction permit application is required before a new source is constructed or an existing source is modified.
• AQD issues the construction permit after it is determined the source is designed to meet applicable rules and pre-construction requirements.
• An operating permit is issued after construction is completed and demonstration is made that the source is capable of meeting applicable emissions limitations and air pollution control requirements.

E-Permitting (Retired)

Web application for Air Quality permit application submittal and management.

Permit Guidance

Policy and guidance documents to aid in application submittal

🖩 Storage Tank Emissions Calculation Tool – for fixed roof and horizontal organic liquid storage tanks

General Permits & Permits-by-Rule

Streamlined permitting mechanisms for certain common industry categories that have similar operations, emissions, and regulatory applicability

Forms & Applications

Forms are grouped by industry sector

Public Participation & Issued Permits

Draft Permits for Public Participation

Air Permits Open for Public Petition

Permit Application Status

Issued PSDPrevention of Significant Deterioration and ACIAir Curtain Incinerator Permits

Permits issued over the past year