The state Liquor and Cannabis Board licenses marijuana growing and processing operations, but other environmental regulations may potentially apply, such as:
- Air quality permitting
- State Environmental Policy Act (SEPA)
- Waste management
- Water quality (Wastewater discharge permitting)
- Water right permitting (depending on the size of the operation)
In addition to the information provided here, we recommend you read Regulatory Guidance for Cannabis Operations before you get started.
Some regulations are site-specific
The design and location of your intended project can significantly influence the viability of your marijuana growing or processing operation. For example, marijuana growing is prohibited in some areas of the state due to local ordinances or federal policy.
The need for permits and authorizations for a project depend on zoning rules, location, and operation details. You might want to ask what approvals are needed through your county or city permitting offices.
Potential permits and certifications
If you generate any dangerous wastes, you'll need to manage your waste properly. Dangerous wastes might include:
- Any processed, concentrated marijuana waste with 10 percent THC (tetrahydrocannabinol) or greater would designate as a state-only dangerous waste (WT02)
- Fluorescent bulbs or other bulbs with mercury
- Unused pesticides, herbicides, etc. to be disposed
- Waste solvents
- Used batteries
Waste generated from processing cannabis must be designated to determine if it is dangerous waste. Process wastes contaminated with the solvents allowed by the Liquor and Cannabis Board
for extraction would not designate as dangerous waste under normal conditions because they are not:
- A liquid with a flash point less than 140 degrees F (WAC 173-303-090(5)(i)); and
- Not a solid which may ignite through friction, absorption of moisture, or spontaneous chemical change; and
- Listed dangerous waste, listed solvents (WAC 173-303-9904; waste codes F001 – F005).
Solid waste management is regulated at the local level by county health departments. You should consult with your local health department to determine what steps you must take to best manage your solid waste.