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King County iMap - noxious weeds layer

Open King County iMap and add the Noxious Weeds layer (open the layer for a list of options by year).

The data on noxious weeds represents locations where these species were located in previous years and may not represent what is present at the current time. Generally only regulated noxious weeds are mapped by the noxious weed program, but where data is available on non-regulated species that is also included. To find out which species are regulated and not regulated in King County, see the King County Noxious Weed List.

For more information about this map or the data, please contact the staff at the noxious weed program.

2012 King County noxious weed locations

This map depicts known locations of weed infestations for regulated noxious weed species in King County based on 2012 surveys. Click map below for larger image or download full size map (file size 1.83 Mb, Adobe Acrobat format).

Map of regulated noxious weeds in King County, Washington based on 2012 surveys - click for larger image


2009 invasive plant and noxious weed surveys in the Middle Fork and South Fork Snoqualmie River basins


2009 Map of Weeds in Middle and South Fork Snoqualmie Basins - click to download mapThis map shows locations of invasive plants and noxious weeds identified by the Upper Snoqualmie Watershed Invasive Weed Control Project, a cooperative weed management partnership of the King County Noxious Weed Control Program, Mountains to Sound Greenway Trust, the Mt. Baker Snoqualmie National Forest and the Washington State Department of Natural Resources. Weed surveys were achieved through a combination of Noxious Weed Program staff, Greenway staff, trained Weed Watcher volunteers, and the 2009 participants of the WSU Extension Youth Environmental Leadership Institute program. Some of the widespread species were only recorded in areas where they were less abundant. Some of the species included in the survey are not on the Washington State Noxious Weed List but do appear to be invasive in this watershed. Click the map image to download the full size map (file size 1.98 Mb, Adobe Acrobat format).


Related information

Related agencies

Program offices are located at 201 S. Jackson St., Suite 600, Seattle, WA 98104. To contact staff, see the Noxious Weed Control Program Directory, send an email, or call 206-477-WEED (206-477-9333).