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Forest Composition

Forest Composition is an assessment of the species, age, and health of the trees in our region. To identify our forest composition, the Chicago Region Trees Initiative has been collecting tree inventories from groups around the Chicago Region. We now have data from USDA Forest Service inventories, municipal surveys, natural areas inventories, home owner associations, university inventories, and a region-wide CRTI private property inventory.

We will continue to collect inventories to get a better understanding of the forest composition in this region. If you have an inventory that you'd like to share, please reach out to Lindsay Darling at