OWRBOWRB Water Permitting FAQ
Water use permit required to grow from your own well or stream
Licensing & registrationLast verified Nov 7, 2026
If you self-supply water from a groundwater well or surface water source to grow marijuana or hemp (not buying from a city, rural water district or other supplier), you need an OWRB water use permit before using the water. A holder of an existing irrigation/agriculture permit who grows medical marijuana must submit a copy of the OMMA license to the OWRB, clearly identifying the permit number. Groundwater permit applications must be filed before drilling and before using the water.
Why it matters
Growing on an unpermitted well is a separate state violation from anything OMMA inspects.
Applies to Grower/Processor/Dispensary/Transporter/Lab
Connected rules
- Notice of intent to drill a well for a grow — Drilling the well
Sources