Emerald Ash Borer

EAB Identification and Reporting | EAB Frequently Asked QuestionsHow Close Is EAB to You? | EAB Quick Guide

August 25- Boulder County adopts an 8 year plan for managing EAB. View the plan on Boulder County's new EAB web page below.

Boulder County EAB Page

2015 EAB Dissection Workshop Flyer


Emerald Ash Borer (EAB) was found in Boulder, CO, in September 2013. As a non-native insect, EAB lacks predators to keep it in check. EAB only attacks ash trees in the genus Fraxinus (so mountain ash are not susceptible). 

Approximately 15% of the trees that make up Colorado's urban forest are ash. There are an estimated 98,000 in the city of Boulder alone. The Denver Metro area has an estimated 1.45 million ash trees. EAB is responsible for the death of millions of ash trees in the United States.

Help protect Colorado's ash trees! Don't move firewood, and consider chemical treatments to protect high-value ash trees within or near the EAB Quarantine area. 

The Colorado Emerald Ash Borer Response Team