Oregon State University

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Understanding Groundwater

Groundwater Basics

What is groundwater? Where does it come from? Where does it go? What is an aquifer? An artesian well? How do streams interact with groundwater?

This section, including most illustrations, was adapted with permission from "What is Groundwater?" by Lyle Raymond, Jr. (© Cornell Cooperative Extension, Cornell University, July 1988).

Oregon's Groundwater Geology

What makes your region special? Read the Underground Story of Water in Oregon. Check out the many resources available to you.

Human Impacts on Oregon's Groundwater

How have our activities affected the quality and quantity of groundwater? Do some parts of the state have greater concerns than others? Find out more from the research done by US Geological Survey, Oregon Water Resources Department and Oregon Department of Environmental Quality.