Urban Forestry

Urban Forest Inventory

During the summer of 2022 Jeffco ISM began our urban forestry inventory (UFI) effort.  The UFI will help us identify the location of ash trees that may be vulnerable to pests and invasive trees that need to be managed.


Jefferson County has close to 50 square miles of urban forest within unincorporated portions of the county.  Most of the properties are privately owned.  Jeffco ISM needs to better understand the makeup of the urban forest so that we can assess potential risks and needs.


In 2022 Jeffco ISM began to map the trees within the suburban portions of unincorporated Jeffco.  We are focusing on three invasive species that are on the state’s noxious weed list (Russian olive, Siberian Elm, and Tree of Heaven).  We are mapping Ash in an effort to develop a long-term strategy for managing the expansion of Emerald Ash Borer.  And will use the information we gather to inform future efforts to protect our urban forest from new invasive species.

How You Can Help

Residents can report their trees through this form.  The information will be shared with local and state agencies to assess risks, develop policy, and evaluate resource needs. 

Reporting Trees

Reporting Form