Protecting trees and forests

Damaging Insects and Diseases

Infestation Location & Management Zones

Generally infested area
Emerald ash borer is in this zone, though not necessarily in all ash trees.

Potential expansion area
Emerald ash borer isn't known to be in the area, but the area is within 10 miles of the outer limits of the known infestation. There is a high probability emerald ash borer will spread naturally to this zone within a few years.

Alert area
Emerald ash borer isn't known to be in the area and it is more than 10 miles from the known infestation.
















Emerald Ash Borer

Emerald Ash Borer (EAB) was found in Concord in March 2013, and the list of towns with known infestations continues to grow. As a non-native insect, EAB lacks predators to keep it in check. EAB attacks ash trees and infested trees die within 3 to 5 years. Help protect New Hampshire's ash trees.  A quarantine of all hardwood firewood, ash wood-products and all ash nursery stock is in effect for Belknap, Hillsborough, Merrimack, and Rockingham counties

Report a suspect tree or insect

Caring for ash trees & managing forests

Identify emerald ash borer, ash trees & learn more

Quarantine & compliance agreements

Receive bug updates


Get Involved: attend a meeting or order handouts

Information for towns and cities