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  • Added 11 Sep 2018
  • Updated 18 Jul 2022

National Wetland Inventory (NWI) with revisions made by local governments in the tri-county region. Portland wetlands are updated from the original Metro dataset by City of Portland, Bureau of Planning & Sustainability to refine geometry, remove erroneously mapped wetlands, and add missing wetlands. This data can be viewed online at

--Additional Information:
Category: Hydro
Purpose:For identifying the location of wetlands.
Update Frequency: As Needed

© City of Portland, Oregon

This layer is sourced from CGIS Open Data.


Copyright Copyright may apply. Please check the source for more information.
RegionsClark County, Multnomah County, Washington County

Technical Details

Layer ID 96786
Data type Vector multipolygon
Feature count 6567
Attributes Wetland_Code, Name, LLID, Reference_Source, Reference_Source_Details, NHD_Feature_Code, Watershed_ID, HUC, HUC_Name, Modified_By, Modifier_Name, Modification_Date, Created_By, Creation_Date, Field_Date, Flag_for_Review, Maintaining_Agency, NOTES, Shape_Length
Services Vector Query API

Last updated 18 Jul 2022 ago
Last checked 18 Jul 2022 ago
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