USDA Forest Service

Forest Inventory and Analysis National Program


Forest Inventory & Analysis
National Office
U.S. Forest Service
1400 Independence Ave., SW
Washington, D.C. 20250-0003

(703) 605-4177

United States Department of Agriculture Forest Service.

Egov.  My Government.  My Terms --  The President's E-government Initiatives.  The United States Government's Official Web Portal.

Other Data

Accessing Phase 3 Data

Below are links to download files for the 1991-1999 Forest Health Monitoring data. They are organized by State, Indicator, and Year.


Alabama California Colorado Connecticut Delaware Florida
Georgia Idaho Illinois Indiana Massachusetts Maryland
Maine Michigan Minnesota Missouri North Carolina New Hampshire
New Jersey Nevada New York Oregon Pennsylvania Rhode Island
South Carolina Tennessee Utah Virginia Vermont Washington
Wisconsin West Virginia Wyoming      

FHM Download Files
Data Descriptions

Reference Information

County Code



Ecoregion Hierarchy information to interpret the ECOSUBCD attribute on the PLOT table in the database, along with the ecoregion file itself, can be retrieved here.

Forest Health Monitoring Program History

FHM plot measurements began in New England in 1990. The program expanded the next year to include some Mid-Atlantic and Southern states, and, thereafter, more states were steadily added each year (see History_fhm_activities.xls for details on FHM plot work). The original forest health indicators included: crown condition, tree damage, and mensuration. Other indicators, such as ozone, lichens, and soils, were introduced in subsequent years. Methods for vegetation diversity and down woody material were tested and developed (therefore, these data are not publicly available).


FIA Phase 3 (Forest Health) Data

Starting in 2000, the Forest Inventory and Analysis (FIA) program, in addition to the conversion from periodic to annual surveys, added the suite of forest health measurements to a subset of the sample locations. This subset, referred to as the Phase 3 (P3) sample, consists largely of the measurements and plots which formerly comprised the plot component of the Forest Health Monitoring (FHM) program. The P3 forest health indicators include data on tree damage, crown condition, presence of ozone damage, lichen species diversity, soils, and down woody material. A seventh set of measurements pertaining to total vegetative diversity is in development.

Data for the P3 component of the Annual FIA program is available through the FIA DataMart page. Please note that the annual inventory program was implemented gradually across the US, starting with about a dozen states in 2000, with increased participation every year thereafter.





USDA Forest Service
Last Modified: February 13, 2017

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site. Interior West Region North Central Region Pacific Northwest Region Pacific Northwest Region Southern Region Northeast Region