Curb CanopySources & Data
Every number on this page has a source. Every source has a verification date. If we don't know where a stat came from, we say so. That's the deal.
City Statistics
The headline numbers shown on the Salem city page.
Tree Equity Score
Equity data aggregated from Census block-group-level analysis by American Forests.
Aggregated from 100 Census block groups. 15 priority areas (TES < 60).
Mean difference between current canopy coverage and recommended goal across all block groups.
Calculated by applying USDA Forest Service rate constants to canopy area data from American Forests. Carbon uses 0.28 kg C/m²/yr (Nowak et al., 2013); stormwater uses 7.3 gal/m²/yr. Tools like i-Tree Eco and Tree Equity Score use local models that account for precipitation, species, and leaf area, so their figures will differ. These estimates are designed for consistent comparison across cities, not as a replacement for a site-specific tree inventory.
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