Naturally Occurring Uranium in Groundwater in Northeastern Washington State

Fact Sheet 2019-3069



Uranium is a radioactive element (radionuclide) that occurs naturally in rock, soil, and water, usually in low concentrations. Radionuclides are unstable atoms with excess energy and as radionuclides decay, they emit radiation. The uranium decay sequence also includes other radionuclides of concern such as radium and radon. This fact sheet addresses naturally occurring uranium in groundwater in northeastern Washington.

Suggested Citation

Kahle, S.C., 2019, Naturally occurring uranium in groundwater in northeastern Washington State: U.S. Geological Survey Fact Sheet 2019–3069, 4 p.,

ISSN: 2327-6932 (online)

Study Area

Table of Contents

  • What is uranium?
  • Why is uranium in drinking water a concern?
  • Why is it important to test my drinking water?
  • Why does uranium occur in groundwater in northeastern Washington?
  • What levels of uranium have been found in area wells?
  • What else could we learn?
  • Where can I find more information?
  • References
Publication type Report
Publication Subtype USGS Numbered Series
Title Naturally occurring uranium in groundwater in northeastern Washington State
Series title Fact Sheet
Series number 2019-3069
DOI 10.3133/fs20193069
Year Published 2019
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Washington Water Science Center
Description 4 p.
Country United States
State Washington
Google Analytic Metrics Metrics page
Additional publication details