Quarantine Information

While the emerald ash borer (EAB) has not been detected within the City of Lake Oswego yet, it is expected to arrive sometime in the near future. 

The EAB has been detected in the following counties:

• Clackamas
• Marion
• Multnomah
• Washington
• Yamhill

A permanent quarantine is now in effect for these counties, triggering specific restrictions. Tree materials from ash, olive, and white fringe tree, must remain within quarantined counties (Washington, Yamhill, Marion, Clackamas and Multnomah). Wood waste must be processed and disposed of accordingly.

Visit the Oregon Department of Agriculture, for specific quarantine details and restrictions, including:

• Regulated materials
• Treatment options for regulated materials
• Timing for removal and pruning

Once EAB arrives in an area, it cannot be eradicated.