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U.S. GEOLOGICAL SURVEY
Water-Resources Investigations Report 01-4023

Hydrogeologic and Water-Quality Reconnaissance of the Artesian Aquifer Under the Shoalwater Bay Indian Reservation and Tokeland Peninsula, Pacific County, Washington, 1998-99

Prepared in cooperation with the
SHOALWATER BAY INDIAN TRIBE

By R.C. Lane and J.C. Ebbert

ABSTRACT

The U.S. Geological Survey (USGS) collected and compiled hydrogeologic and water quality data from September 1998 through September 1999 to describe the hydrogeologic setting and to assess the quality of the water in the artesian aquifer under the Shoalwater Bay Indian Reservation and the adjacent Tokeland Peninsula area of Pacific County, Washington. Hydrogeologic data include descriptions of 38 wells, lithologic data for 27 wells, and water-level data for 17 wells and 1 tidal station. Water-quality data include field measurements for temperature, specific conductance, pH, alkalinity, bicarbonate, carbonate, dissolved oxygen, and laboratory analyses for major inorganic ions, metals, nutrients, methylene blue-active substances, and pesticides. None of the 93 field measurements or chemicals analyzed for exceeded the U.S. Environmental Protection Agency (USEPA) primary standards for drinking water and only 2 constituents (iron and manganese) exceeded the USEPA secondary standards. Sixty-six of the constituents (including all 53 pesticides) were at or below the reporting or detection levels established by the USGS National Water Quality Laboratory.

CONTENTS

Abstract
Introduction
Hydrogeology
Water Quality
Summary
Selected References
Appendix A. Water-Quality Methods

This report is available online in Portable Document Format (PDF). If you do not have the Adobe Acrobat PDF Reader, it is available for free download from Adobe Systems Incorporated.

Download the report (PDF, 3.5 MB)

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Send questions or comments about this report to the author, Ron Lane (rclane@usgs.gov) 253.428.3600 ext. 2604.

For more information about USGS activities in Washington, visit the USGS Washington District home page.



U.S. Department of the Interior, U.S. Geological Survey
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