Do I Need an Air Permit?

Regulated Pollutants


A permit is required for a stationary source that emits or has the maximum capacity to emit regulated air pollutants in an amount greater than or equal to the following permitting thresholds:
Pollutant Potential
to Emit
Emission Rate in
Tons per Year (TPY)
Particulate Matter (PM2.5) 0.5
Particulate Matter (PM10) 0.5
Sulfur Dioxide (SO2) 1.0
Nitrogen Oxides (NOx) 1.0
Volatile Organic Compounds (VOC) 0.5
Carbon Monoxide (CO) 1.0
Lead (Pb) 0.3
Single Hazardous Air Pollutant (HAP) other than Pb
 0.5
Total HAPs
 1.0
Any other regulated air pollutant
 1.0
A dust control permit is required by Rule 310 (PDF) for any activity that will disturb a surface area equal to or greater than 0.1 acre (4,356 square feet).



Business Assistance


The Business Assistance office provides information and technical assistance to business owners related to air quality rules and regulations. The program offers courtesy site visits, rule interpretation and education, on-site training, and a formal case review process for violations.
Page reviewed 31 August 2023