Who is responsible for determining the tree risk threshold?

The responsibility for determining the tree risk threshold ultimately lies with the owner or manager of the tree. This is because the owner or manager is most familiar with the specific tree, its surrounding environment, and the intended use or exposure of that area. They have the local context to assess the potential consequences of a tree failure, whether that may involve liability, safety risks, or impacts on property.

A tree risk assessor can provide valuable analysis and recommendations based on their expertise, but the final decision regarding the acceptable level of risk—what is considered acceptable or unacceptable based on potential threats—rests with the owner or manager. This local knowledge is critical because risk thresholds can vary significantly based on specific circumstances such as tree species, location, and use.

Moreover, while local government authorities and environmental agencies play roles in creating broader regulations and guidance concerning tree management and public safety, they do not typically assess individual tree risks directly. Therefore, acknowledging that it is the owner or manager who has the most direct bearing and ultimate authority regarding the risk threshold is essential for effective tree risk management.