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Emerald Ash Borer (EAB), Agrilus planipennis
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Maine Quarantine on Emerald Ash Borer
Current Quarantine Area: The quarantine area updated in November 2023 includes all of Androscoggin, Cumberland, Hancock, Kennebec, Knox, Lincoln, Sagadahoc,Waldo and York Counties and parts of Aroostook, Franklin, Oxford Penobscot, Piscataquis, and Somerset Counties. The quarantine boundaries were drawn to include a buffer on those towns where EAB had been detected. To slow the spread of the destructive emerald ash borer, we encourage everyone to adhere to the regulations and follow best management practices when handling ash within these regulated areas.
- EAB Quarantine Rule - CH 275 (PDF)
- Maine Forest Service Emerald Ash Borer Emergency Order (none currently)
- FAQs - EAB Quarantine (PDF)
- EAB Quarantine Maps:
- Areas Regulated for Emerald Ash Borer in Maine (PDF)
- Southern Maine Map of EAB Quarantine (PDF) - updated May 7, 2025
- Northern Maine Map of EAB Quarantine (PDF) - updated April 7, 2025
The emerald ash borer (EAB), Agrilus planipennis, is one of the most serious invasive species threatening our ash resources and forests. All species of (Fraxinus) ash trees, but not (Sorbus) mountain ash, that grow in Maine are susceptible to injury and death by the emerald ash borer.
Learn how to identify ash trees (YouTube)
EAB was first found in Aroostook County (Madawaska, Frenchville, and Grand Isle), and York County (Acton, Berwick, and Lebanon), ME in 2018. It was detected in Cumberland County (Portland) in September 2019.
