Tree Hazard Evaluations 

Tree Hazard Assessment

What is a Tree Hazard Assessment?

A hazard tree assessment is a process used to identify and evaluate trees that pose a risk to people, property, or infrastructure. This assessment is typically performed by a certified arborist or tree care professional who examines the tree's health, structure, and potential targets in the surrounding area.
The goal is to determine the likelihood of tree failure and the potential consequences, which helps guide decisions on whether to remove, treat, or monitor the tree.
Another fallen tree after a storm
Tree risk assessment manual for arborists

What is the hazard rating system for Trees?

While it is not possible to know every risk involved with every tree, there is a further qualification (available from the International Society of Arboriculuter (ISA) known as TRAQ) that a Certified Arborist can complete that covers the steps providing a systematic and structured approach to assess the risks and developing a plan to manage the same.

These steps are based in science and arboriculture, and are not driven by aesthetics and simple client desire when suggesting removal of a high risk tree.

Risk assessment is not always necessary, but when it is - be sure that you are dealing with an Arborist with the TRAQ qualification. Caldwell Tree Care has several on staff.


Hazardous tree

What are the indicators of a hazardous tree?

Visible damage

This includes cracks, splits, or cavities in the trunk, large broken or hanging branches, and other visible signs of decay or damage.

Dead or dying branches

Dead branches, especially those near the top of the tree, can be a sign of poor health or structural instability.

Root damage

Damage to the root system, such as from construction, erosion, or disease, can compromise the tree's stability and make it more likely to fall.

Poor architecture

Trees with poor architecture, such as a leaning trunk or an unbalanced canopy, may be more prone to failure.

Disease or insect infestation

Certain diseases and insect infestations can weaken a tree and make it more likely to fail.

Proximity to targets

A tree that is close to a target, such as a building, road, or power line, may be more likely to cause damage if it falls.


Older trees may be more prone to structural defects and decay, making them more likely to fail.

Get in Touch for Tree Hazard Assessment

Contact us for tree hazard assessment services. We're committed to providing safe, efficient, and eco-friendly solutions tailored specifically to your needs.