Interagency Maps

Maps by Organization

Click on one of the buttons below to jump to available maps from an agency. 

WERI research product maps are research-based and developed maps. 

NGLA Map

About 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%

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Nitrate-N and Sources

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).

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Surface Hydrology

About This map shows the plateau basins with their CHamoru names. Updates Last updated in 2021. Web Map App See some of the viewing options

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Production Salinity

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Short description about the maps from the Guam Waterworks Authority (GWA). 

Production Wells

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System Network

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Observation Wells

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WUDR

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Short description about the maps from the Guam Environmental Protection Agency (GEPA). 

Wellhead Zones

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Spills

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Sinkholes

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Short description about the maps from the United States Geological Survey (USGS). 

Observation Wells

About Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo. Updates Last updated in YYYY. Web

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NGLA Model

About Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo. Updates Last updated in YYYY. Web

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NGLA Recharge

About Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo. Updates Last updated in YYYY. Web

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Gages

About Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo. Updates Last updated in YYYY. Web

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Short description about the maps from the Guam Bureau of Statistics and Plans (GBSP). 

Imagery Set

About An imagery set of Guam in 2005, 2011, and 2015. Updates Last updated in 2015. Web Map App See some of the viewing options

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Digital Elevation

About A LiDAR-based digital elevation model of Guam. Updates Last updated in 2012. Web Map App See some of the viewing options of the map

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Hillshade

About Map of Guam’s digital elevation with a hill shade rendering. Updates Last updated in 2012. Web Map App See some of the viewing options

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Short description about the maps from Guam Department of Land Management (GDLM).

Parcels

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Land Trust

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Historical Maps

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Streets and Highways

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Short description about the maps from the Kumisión I Fino’ Chamoru Yan I Fina’nå’guen I Historia Yan I Lina’la’ I Taotao Tåno’. 

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