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Geographic Information Systems (GIS)

Welcome! Ecology's GIS staff builds and maintains spatial datasets and applications, conducts GIS projects, and publishes GIS maps in support of the agency's mission of protecting the land, air, and waters of the state. Tools used in this work include GIS software by Environmental Systems Research Institute (ESRI) including ArcInfo, ArcView, ArcSDE, ArcGIS Server, and ArcIMS.

These pages are targeted for an audience experienced with GIS terminology and standards. If you are new to GIS, you can learn more at (USGS) or (ESRI). Also, our Frequently Asked Questions (FAQ) page may help you with our data and maps.


View sample images of our GIS data, read the FGDC compliant metadata, and/or download the data as ESRI shapefiles (*.shp) or file geodatabases. If you cannot find the data you want, or if you need it in some other format, please use the Digital Data Request Form (view in HTML format) to tell us what you need.


View/download some of our GIS standard maps products online in Adobe Acrobat, PDF format.


View information about some of our GIS applications and download scripts to run at your site.


Use our GIS services for your information needs.


Find out about the GIS Projects the Department of Ecology is working on or has done.


Find out about GIS/ArcView training opportunities for federal, state, and local government clients.

Page last updated on Wednesday, August 10, 2016 18:16 by Rich Kim

What's New?


August 10 - New 2014 303(d) and 303(b) Water Quality Assessment Layers

May 24 - Updated Marine Shorelines, Surface Water Quality Standards NHD, and  SMA Jurisdiction Adopted Lakes, Streams, & Marine.

May 5 - Updated Well Logs

April 25 - National Hydrography Dataset (NHD) for Washington (Hi-Resolution NHD,  24k-4k)



What's New Archive

GIS Frequently
Asked Questions