Benton County, WA Landscaping Rules: Water Restrictions (2026)
Water restrictions in Benton County, WA, also called the watering schedule, outdoor irrigation rules, or drought ordinance, set which days and hours you can run sprinklers or irrigation.
Key Facts
- Water system
- Prior appropriation
- Yakima Basin
- Fully adjudicated (Acquavella)
- Districts
- Kennewick, Columbia
- Drought
- Junior rights curtailed first
- Other source
- Columbia River
Summary
Water is Benton County's defining constraint. Washington follows prior appropriation, and the Yakima River Basin is fully adjudicated. Irrigation districts deliver seasonal water by seniority, and junior rights face curtailment in drought years.
Subject to existing rights all waters within the state belong to the public, and any right thereto, or to the use thereof, shall be hereafter acquired only by appropriation for a beneficial use and in the manner provided and not otherwise; and, as between appropriations, the first in time shall be the first in right.
Full Breakdown
The Columbia Basin desert runs on irrigation. Washington is a prior-appropriation state, so surface and groundwater withdrawals require a water right from the Department of Ecology, and the Yakima River that crosses Benton County is fully appropriated under the long-running Acquavella adjudication. Much valley water reaches farms and yards through irrigation districts such as Kennewick and Columbia, which ration by priority date; in dry years junior, proratable rights are cut first. Tri-Cities utility customers follow city conservation rules, tighter in drought. The Columbia River is the county's other major source.
Violations & Fines
Watering outside your district's or utility's schedule brings warnings, surcharges, and escalating fines, and drought-year curtailment can cut junior irrigation deliveries. Unauthorized withdrawal without a water right is an Ecology enforcement matter.
Frequently Asked Questions
Do I need a water right to irrigate my Benton County yard?
Why is my irrigation water cut in a drought?
Sources & Official References
Other rules in Benton County
How Benton County compares: Cities with the Strictest Water Restrictions·Compare Benton County to another location·View the Washington landscaping rules overview
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