Groundwater and Surface-Water Data Collection for Mason County, Western Washington, 2016–18

Data Series 1106
Prepared in cooperation with the Mason Conservation District
By:  and 



Groundwater levels and surface water flow measurements were collected from August 2016 to September 2018 to provide the Mason Conservation District and other stakeholders with basic knowledge of existing water resources in Mason County, Washington. Additionally, the data were collected with the intent of contributing to informed decision making about groundwater use, management, and conservation throughout the county and for future inclusion in a groundwater model. Data were collected and compiled for 130 sites—110 wells and 20 miscellaneous surface-water discharge sites. In the spring of 2016, field reconnaissance was conducted to locate suitable locations for baseflow discharge measurements to be used for estimating groundwater contribution to surface flow. In the summer of 2016, a field inventory of wells was conducted to acquire locational data and to assess the suitability of the wells for inclusion in a monthly groundwater-level monitoring network. Groundwater levels were measured bimonthly in the 64 wells over 2 years. Streamflow measurements were conducted two times each summer during two summers for each of the 20 surface water sites.

Suggested Citation

Tecca, A.E., and Frans, L.M., 2019, Groundwater and surface-water data collection for Mason County, western Washington, 2016–18: U.S. Geological Survey Data Series 1106, 26 p.,

ISSN: 2327-638X (online)

Study Area

Table of Contents

  • Abstract
  • Introduction
  • Methods
  • Results
  • Summary
  • Acknowledgments
  • References Cited
Publication type Report
Publication Subtype USGS Numbered Series
Title Groundwater and surface-water data collection for Mason County, western Washington, 2016–18
Series title Data Series
Series number 1106
DOI 10.3133/ds1106
Year Published 2019
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Washington Water Science Center
Description v, 26 p.
Country United States
State Washington
County Mason County
Online Only (Y/N) Y
Google Analytics Metrics Metrics page
Additional publication details