Forest Health Program
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Growing Healthy Forests Throughout Washington

Growing healthy forests means using science to meet the needs of trees, bugs, fungi, fire, water, and more. The Department of Natural Resources develops information about all the types of forests that we manage—from rainforests on the Olympic Peninsula, to moderate Puget lowlands, to pine-dominated forests of eastern Washington. Our scientists carry out research and monitoring and then DNR adapts practices using science-based decisions.
DNR's Forest Health Program shares their knowledge by providing tree and forest health care technical assistance. Whether you are interested in healthy tree growth, diseases or pests that affect trees, or how we help create older forest conditions next to streams, lakes, and rivers, we serve a variety of public and private landowners including:
  • State
  • Farm
  • County
  • Woodland
  • Municipal 
  • Urban managers
  • Industrial
  • Residential owners

Landowner Assistance Center

Thinning dense forests is the best way to protect your forest from severe insect or wildfire damage. Cost-share funding is available to reimburse landowners for the cost of thinning their forest to improve forest health.
Program services include technical expertise, available through numerous forest health workshops sponsored by a variety of agencies. On-site prescriptions for improving forest and tree health are routine. Applied research and cooperative studies with universities and government agencies provide state-of-the-art forest and tree health care prescriptions for landowners. Demonstration sites that show benefits of various forest health practices are scattered across the state. 
Annual detection, ranging from aerial and ground surveys to pheromone (attractant) trapping, provides early warning of pest epidemics or reports on new pests. Close ties with western states, Canadian provinces and federal agencies provide timely alerts about threatening forest pests.  
Annual Forest Health Highlights and other publications identify current pest problems and provide answers for dealing with them.
For more information on forest health, see the Forest Health Hazard Warning webpage.
Find Forest Health Aerial Survey data on this interactive web service: This is the place where the most current Annual and Cumulative Aerial Survey data will be displayed. The Cumulative Aerial Survey data set contains several million polygons, so to speed up the loading process, the user has to zoom in until “15 Year Mortality Indicator 1999-2013” title (on the left) switches from grey to black. Users can create their own PDF, JPG, and PNG maps of the field of view by clicking on the printer icon in the upper right corner.
Animated Maps of Insect & Disease Damage: 
State and federal forestry agencies have cooperated to produce annual aerial surveys of insect and disease damage for over 40 years. The annual maps have been compiled into an animated progression of damage by the US Forest Service Forest Health Protection Program, PNW Region.

Federal Civil Rights
In accordance with Federal law and U.S. Department of Agriculture policy, DNR does not discriminate on the basis of race, color, national origin, sex, age or disability. However, should a person wish to file a discrimination complaint, please write to:
USDA, Director
Office of Civil Rights

Room 326-W, Whitten Building
1400 Independence Avenue SW
Washington D.C. 20250-9410
or call 202.720.5964 (voice and TDD).
USDA is an equal opportunity provider and employer.