DEQ is committed to issuing air quality permits in a timely manner, and we employ a staff of engineers devoted to this task. Timeliness depends upon the completeness of the information, and we must have all the necessary information before our engineers deem an application complete and begin the permit development process.
The preapplication meeting is the first step in the process and aids DEQ in understanding the project and providing guidance to the applicant. Request a preapplication meeting with DEQ using the Pre-application Meeting Request Form.
Contact the DEQ Air Quality Permitting Hotline (1-877-573-7648) for assistance on industrial air permitting or exemptions.
Permit to Construct – An air quality permit to construct (PTC) is required before constructing or modifying buildings, structures, and installations that emit or may emit air pollutants.
Tier I – Title V of the federal Clean Air Act Amendments of 1990 requires states to develop programs for issuing operating permits to major stationary sources of air pollutants. the Tier I operating permit (also known as a Title V operating permit) brings together all of the applicable federal, state, and local air requirements for an air pollution source into one federally-enforceable document.
DEQ is the state agency delegated by the US Environmental Protection Agency (EPA) to issue Tier I operating permits in Idaho.
Tier II – A facility may apply for a Tier II Operating Permit to authorize Facility Emission Caps, establish mercury best available technology limits (mBACT), or to establish synthetic minor emission rate limits. DEQ may also require certain facilities to obtain a Tier II operating permit to establish Best Available Retrofit Technology (BART) or other limitations as part of the Regional Haze Program.
Forms, Guidance, and Checklists for Tier I, Tier II and Permit to Construct – The following links are used for the preparation of various air quality permit applications:
- 6H Exemption Concurrence Request Form
- Afterburner/Oxidizer Form
- Automotive Coating Form
- Automotive Coating Self Exemption Form
- Baghouse Control Equipment Form
- Cabinet Making Exemptions Form
- Carbon Adsorber Form
- Compliance Assurance Monitoring Form
- Concrete Batch Plant Form
- Cooling Tower Form
- Cyclone Separator Form
- Dairy Permit By Rule Registration Form
- Electrostatic Precipitator Form
- Exemptions Form
- Federal Regulation Review and Applicability Form
- General Information Form
- Hot Mix Asphalt Plant Form
- Industrial Boiler Heater Form
- Industrial IC Engine Form
- Nonmetallic Mineral Processing Plant Form
- Pre-Application Meeting Request Form
- Spray Paint Booth Form
- Scrubber Control Equipment Form
- 15-Day Pre-Permit Construction Approval Application Completeness Checklist
- Exemption Criteria and Reporting Requirements for Toxic Air Pollutant (TAP) Emissions Checklist
- Minor Source Permit to Construct Application Completeness Checklist
- PTC Completeness Review Checklist
- Small Wood-Fired Boiler Permit to Construct Application Checklist
- Tier I Application Completeness Checklist
- Toxic Air Pollutant (TAP) Preconstruction Compliance Application Completeness Checklist
Submit Your Application
Applications submitted to DEQ for an air quality permit or exemption must be made on forms developed by DEQ. If you have questions about which form to use or about the application process in general, call the Air Permit Hotline at (1-877-573-7648).
Unless specified, all applications require the following form:
Permit applications or exemptions may be submitted via email to email@example.com or mailed to the following address:
DEQ State Office – Air Quality Division
1410 N. Hilton St.
Boise, ID 83706
Most applications require a $1,000 application fee. To pay fees, see Resources below.