Communities in Iowa where trees were sampled by location (quadrant) and by community population level. The total number of sample trees in each community is indicated parenthetically following the community name. In all communities, trees sampled were located in public spaces, except for West Okoboji, where residential trees were evaluated.
| Community population category | Quadrant | |||
|---|---|---|---|---|
| Northeast | Northwest | Southeast | Southwest | |
| >10,000 | Waterloo (58) | Sioux City (57) | Iowa City (36) | Ankeny (46) Des Moines (141) |
| 2,000–10,000 | Maquoketa (35) | Webster City (57) | Pella (46) | Johnston (48) |
| Eldora (70) | Rock Valley (50) | North Liberty (57) | Clarinda (61) | |
| <2,000 | Calmar (25) | West Okoboji (27) | Delta (14) | Lenox (22) |
| Colesburg (32) | Holstein (34) | Baxter (6) | Treynor (10) | |