Oregon Exempt Wells: How Much Water a Household Well May Use

In Oregon, some small groundwater uses do not need a water right permit. The Oregon Water Resources Department (OWRD) exempt-use handout lists them.

Limits stated

Household: up to 15,000 gallons per day for a single or group household.
Lawn or garden irrigation: exempt only for areas of half an acre or less. Larger needs a water use authorization.
Commercial gardens (from January 1, 2026): half an acre or less, up to 3,000 gallons per day.
Industrial or commercial: up to 5,000 gallons per day, which includes the 3,000 for commercial gardens.
Stock watering: livestock drinking water, with limits possible for some confined animal feeding operations.

Conditions

Water must be used beneficially and without waste. Exempt uses carry the same privileges and restrictions as a permitted right. Each exemption is separate, though one well may serve several exempt uses. The handout advises contacting your local watermaster with specific questions.

For sprinkler planning

If you irrigate near the half-acre limit, ask your watermaster before installing. See our sprinkler layout article for design basics. Not verified: well-drilling and pump-installation requirements.

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General information only. Not electrical, plumbing, legal or code advice. Confirm details with a licensed professional and your local authority.