Oregon's Impaired Waterways

The State of Oregon’s Department of Environmental Quality is responsible for monitoring and regulating all public waters in Oregon. One way they do this is by testing water quality for pollution parameters such as pH, Dissolved Oxygen and Temperature. If water samples are over a certain threshold, DEQ is required to list that water body as impaired.  To view the list of impaired waters of Oregon, click on the link below to view the interactive map. You can select each water body to find out it's status and what pollution parameters have been selected. 

DEQ Story Map

Find out how DEQ determined which waterways were considered impaired and read their 2018/2020 Integrated Report. 

DEQ Impaired Water Interactive Map

View DEQ's interactive map which allows you to select waterways throughout the state and find out which are classified as impaired and for which pollutants.