NGLA Maps

Production well nitrate-N analysis and potential sources (page under construction, live test)

The information provided herein is for illustrative purposes only.  All utility information must be verified by the appropriate agency.  Some information is based on modeling results that are estimates only.  Use of this information is at your risk.  WERI/UOG is not liable for use of this information.

Webapp

Web app test

The Northern Guam Lens Aquifer (NGLA) is Guam’s major source of utility water, from which military and government of Guam draw up to 90% of the island’s potable water. As we continue to develop above and increase demand of utility water from this water source, we need to be careful. And we need more detailed information and availability of map products that can help strategize development. The NGLA Maps is the main source collection of useful spatial information obtained as an individual GIS shapefile or a blend of map layers that will be the most useful information for optimum development concerning our most valuable resource. 

WERI Research Product Maps

WERI research product maps are research based and developed maps.

NGLA Map

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Nitrate-N and Sources

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Surface Hydrology

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Production-Salinity

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Download Map Elements/Features

NGLA Map
basement topography, contours
groundwater basin boundaries

Nitrate-N and Sources 
(shape files)

Surface Hydrology
(shape files)

Production Salinity
(shape files)

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GWA Maps

Production wells

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System Network

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Observation Wells

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WUDR

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GEPA Maps

Groundwater Protection Zone

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Wellhead zones

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Spills

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Sinkholes

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USGS Maps

Observation Wells

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NGLA Model

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NGLA Recharge

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Gages

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GBSP Maps

Imagery1

Imagery Set

An imagery set of Guam in 2005, 2011, and 2015. 

LiDAR-based Digital Elevation Model.

Digital elevation with a hill shade rendering. Updated 2012.

Map of Guam streets, highways, and public access routes. Updated 2012.

GDLM Maps

Parcels

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Land Trust

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Historical Maps

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Streets Highways

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