The Oregon Water Resources Department is undertaking a cooperative groundwater study with the Washington State Department of Ecology (WA-Ecology) and the US Geological Survey (USGS) to better understand the Walla Walla hydrologic system. The study goal is to produce a comprehensive understanding of the bistate groundwater system that will enable holistic water management decisions. This includes developing a description of groundwater interactions between the various aquifers and surface water.
In 2022, Department staff continued to work with the USGS and WA-Ecology on data collection. This year, over 15 OWRD staff worked to collect a variety of data, including:
- Flow and seepage data on the Walla Walla River
- Quarterly flow data on the Little Walla Walla River, Pine Creek, Dry Creek, Mud Creek and other spring fed tributaries
- Quarterly and continuously recorded groundwater level data
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USGS Walla Walla Groundwater Study
Newsletter
Please see the links below for our Walla Walla Study Updates newsletter
January, 2025
October, 2025
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Want to learn more about Walla Walla River Basin Study Reports?
Visit our Groundwater Investigations and Publications Page:
Oregon Water Resources Department : Groundwater Investigations and Publications : Groundwater : State of Oregon