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Natural Background Groundwater Arsenic Concentrations in Washington State: Study Results

Publication number Date Published Date Revised
14-09-044July 2021January 2022
VIEW NOW Natural Background Groundwater Arsenic Concentrations in Washington State: Study Results (Number of pages: 82) (Publication Size: 6364KB)
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Author(s) Charles San Juan, Toxics Cleanup Program
Description This report presents the results of a study begun in 2010 by the Washington State Department of Ecology’s Toxics Cleanup Program. The study evaluated natural background groundwater arsenic levels in Washington state, using data from more than 5,000 public water supply wells. “Natural background” means not altered by human activity.

REVISION NOTE: A draft of this document was available for public comment from Thursday, July 15 through Monday, August 16, 2021. Comments received during that time have been incorporated into the final document.
The mission of the Department of Ecology is to protect, preserve, and enhance Washington’s environment. To help us meet that goal, please consider the environment before you print or request a copy.

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Contact Policy & Technical Support Unit, Toxics Cleanup Program at 360-407-7170
Keywords Okanogan Basin, Public water supply wells, Puget Sound Basin, Snohomish Basin, Southwest Washington, Spokane Basin, Watershed basins, Island County, Yakima Basin, arsenic

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