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Mapping and GIS Data

Maps of the groundwater and surface water drinking water source areas and potential contaminant sources identified within those drinking water source areas are available in several formats including an online interactive mapping tool, GIS data layers and in a print-ready formats.

Due to security reasons, the agencies restrict access to the GIS layers with latitude/longitude readings of wells, springs and intakes.

If you do not find what you are looking for or would like individual maps, data layers or data queries at a local or regional scale, please email Drinkingwater.Protection@deq.oregon.gov

GIS data and services

Geospatial data for download and web map services are maintained by Oregon DEQ’s Drinking Water Protection group. Specialty GIS software (like Esri ArcMap) is needed to download data and use the map services.  Read a description of available services and file locations. GIS datasets available for direct download include the following:
 
  • Groundwater Time-of-Travel Zones for Drinking Water Source Areas
    Download: GIS layers, updated, Oct. 7, 2021
  • Groundwater 1 and 2-year Time-of-Travel Zones for Drinking Water Source Areas
    Download: GIS layers, updated Oct. 5, 2021
  • Groundwater Drinking Water Source Areas in Oregon 
    Download: GIS layers, updated Nov. 24, 2020
  • Surface Water Drinking Water Source Areas in Oregon 
    Download: GIS layers, updated June 20, 2025
  • Potential Contaminant Sources (updated periodically - info available on Interactive Map Viewer)
    Download: GIS layers
  • Additional DEQ GIS data
Visit Statewide Surface Maps and Land Use Data for additional information and maps.

Contact

For more information, email: 
Drinkingwater.Protection@deq.oregon.gov