About
This map illustrates the nitrate concentrations in production wells. The contents of this analysis overlays the map of the Northern Guam Lens Aquifer (NGLA).
Updates
Last updated in 2021.
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Downloadable Map Content
Click on one of the tabs below to view a list of shape files or raster files available for you to download.
Basement topography | Elevation contours, meters, Vann, Bendixson, Habana 2018
Basement contours | Select contours 0, -20, -40 meters
Saltwater toe extracted from groundwater model | No pumping, 50% isochlor, Gingerich 2014
Aquifer basins 2021 | Basement and flow line delineation, from Gingerich 2013 model
Water table contours | No pumping condition, from Gingerich 2013 model
NGLA Map 2021 | Basic shapefiles package
Links to these files are currently under construction. Please check again later.
