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 Approved marijuana growers and producers are subject to additional local, state and regional regulations and requirements. These additional requirements come with their own timelines and costs. Growers and producers must obtain a air emissions permit from our Agency. 




Producer & Processor Requirements

The main requirements for your facility include our permitting program and our registration program.

Permitting Program

The permitting program, referred to as a Notice of Construction (NOC), is a pre-construction application and review process that, when approved, results in a permit for your business with site specific conditions. NOC application decisions are made on case-by-case basis, based on the specifics of the application and the emission control technology options.

A $1,150 filling fee is required with your NOC application. Additional processing fees are due after review of the permit application and based on the information in your application and the specifics of your facility and equipment.

Registration Program

The registration program includes onsite inspections, compliance reviews, and annual fees. The inspections include review of compliance with specific permit conditions, along with general agency regulations that apply to all sources. To keep your permit in effect, you must maintain an active registration. Any lapses in registration invalidate your business' permit and ability to operate.


To complete the permit application, you will need the following information:

General Information

  • Applicant and owner or company information
  • Installation address
  • Facility type and purpose (recreational, medical, grower, processor)
  • Location of plants and expected canopy size in square feet
  • Expected annual yield in pounds (flowers/buds, leaves)

Producer and Processor Activities

  • Odor control equipment details for producing/growing and or processing (type, quantity, make and model, flowrate)
  • Solvent usage information including MSDS for each type


  • A plan view drawing of facility including:
    • each room, greenhouse, or outdoor area and what work is preformed in each
    • location of each odor control device, associated ductwork, and stacks
  • Schematic drawing of HVAC system for facility indicating path of all air flowing through area where growing or processing occurs
  • Spec sheets for each type and model of odor control device and fan
  • Spec sheet for extraction device
  • MSDS for extraction solvents
  • MSDS for each additional solvent and volatile organic material used
  • Environmental checklist (SEPA)

To begin the application process, complete the following application and checklist:

Note: Your application will not be processed unless the filing fee of $1,150 is included with the application or until you pay by credit card.

If you have questions, contact Rick Hess​ at​ or 206-689-4029




What are the agency’s general regulatory requirements?

Odors from producing and processing plants must be controlled and not cause a nuisance to your neighbors.

The main requirements are the Notice of Construction (NOC) or permitting program and the Registration program. The NOC program is a pre-construction application and review program that, when approved, result in permits to businesses with site-specific conditions to achieve compliance with air quality laws and regulations. The NOC applications  rely on case-by-case decisions which reflect the specifics of the application and the emission control technology options and projected impacts for that specific proposal.

The Registration program includes onsite inspections, compliance reviews, and annual fees to the Agency. The inspections review compliance with specific permit conditions (obtained through the NOC approval process) along with general agency regulations. 

Why does the Agency care about these facilities?

We are charged with preventing, reducing and controlling emissions and exposure from significant sources of air pollution.  If facilities need meaningful emission controls to prevent them from being a nuisance to the public, we take that responsibility seriously and want to work with producers and processors to identify the methods and means to achieve the common goal of “no nuisance impacts.”

We care about the actual or potential emissions that may come from these facilities for producers and processors. Our current understanding is that the producer (i.e. grower) and processor operations produce a significant amount of odorous emissions which may  cause nuisance impacts off site if they are not properly controlled and managed. Colorado is working through similar issues to those faced in Washington and has shared some guidance regarding some odor control practices.

We have coordinated with other local government agency representatives and visited some early licensee sites to understand what types of activities are involved in these operations. This has confirmed the potential for odorous emissions.

Our focus is on the producers and processors for this industry, not retail facilities.