The Pacific Northwest Forest Inventory and Analysis (PNW-FIA) program summarizes and assesses trends in forest conditions in Alaska, Washington, Oregon, California, Hawai'i, and U.S.-affiliated Pacific Islands. Data for California, Oregon, Washington, and Coastal Alaska are updated annually. Interior Alaska, Hawai'i, and U.S.-affiliated Pacific Islands are inventoried periodically.
Inventory data is publicly available for download. On the national FIA Data and Tools page users can access raw data or use several table creation tools to create custom data summaries.
Data can also be accessed through our PNW-FIA inventory databases (MS Access-based tools):
Typically, annual FIA data are summarized for each state. However, due to the complexity of implementing an annual inventory cycle throughout the vast and diverse forests in Alaska, the statewide FIA program has been separated into two broad regions (Coastal and Interior). Note that efforts are underway, yet interior Alaska datasets may not be fully integrated into the National FIA Data Mart due to the unique sampling method employed
Typically, FIA data are collected annually summarized for each state. However, we operate a periodic inventory in Hawai’i where data on all plots are collected in a 3-5 year window before being summarized rather than an annual inventory cycle where a subset of plots are visited each year.
The PNW-FIA program conducts a systematic, sample-based, field inventory across all ownerships in the Pacific Islands on a periodic basis. Please visit our Pacific Islands Inventory page for forest resource estimates and inventory partnership details for each island group.