HB 3372

Revisions to Exempt Groundwater Use in Oregon
In the 2025 Oregon Legislative Session, the Oregon State legislature passed House Bill (HB) 3372. HB 3372 changes rules allowing people to use groundwater without requiring a water right. These uses are called “exempt” from water right requirements.

Groundwater is a major source of domestic, stockwater, and supplemental irrigation in Oregon, especially in rural areas. People use it for drinking, raising animals, and growing food. Typically, to use groundwater (or surface water), one must obtain a water right of use from the Oregon Water Resources Department. But, Oregon law, found in Oregon Revised Statute (ORS) 537.545, allows for certain groundwater uses to be “exempt” from this requirement. People often refer to these wells as “exempt groundwater wells” or “domestic-exempt wells.” To date, Oregon has approximately 230,000 exempt groundwater wells with approximately 3,800 new wells drilled annually.
Exempt Uses
Previously, under Oregon water law, someone could use an exempt groundwater well for the following uses:
- Stock watering purposes up to 12,000 gallons per day (with an exception for confined animal feeding operations)
- Watering non-commercial lawns or gardens (for areas up to one-half an acre)
- Watering school grounds up to 10 acres in a critical ground water area
- Single or group domestic in-home use up to 15,000 gallons per day
- Commercial use up to 5,000 gallons per day
- Reusing water for irrigation, if it follows certain rules
New Exempt Use
With the passing of HB 3372, an additional exemption was added: irrigation of a commercial garden up to one-half acre using no more than 3,000 gallons per day. This commercial garden use can be combined with groundwater for commercial business purposes. In that case, the total cannot go over 5,000 gallons per day. Also, the new exemption says that cannabis growers can be considered for the new commercial garden exempt use. However, the cannabis grower must be licensed as an industrial hemp grower (ORS 571.281).
Special Rule for the Lower Umatilla Basin
In the Lower Umatilla Basin Groundwater Management Area, the new exempt use allowing irrigation of commercial gardens does not begin until January 2, 2028. Lawmakers added this exception for the Lower Umatilla Basin Groundwater Management Area, shortened to “LUBGWMA,” in the final round of amendments to the proposed bill. Officials designated the Lower Umatilla Basin as a groundwater management area in 1990 due to the high levels of nitrate found in the groundwater.
When Exempt Use is the Only Way to Get Water
Given the new groundwater rules for permitting, exempt uses may be the only available groundwater source readily available to developers and small organic growers. Schroeder Law Offices can assist in regulatory compliance and development via exempt uses. Find us at: Inquiry Form – Schroeder Law Offices, PC









