Western Tree Failure Database/California Tree Failure Report Program

WTFD Statistics

1/8/2025


Report Count :6766  



Most commonly reported genera : Quercus (1554), Pinus (1132), Eucalyptus (838), Hesperocyparis (348), Acacia (220)

Next most commonly reported genera : Fraxinus (211),  Ulmus (207), Liquidambar (169), Cedrus (142), Sequoia (131), Pseudotsuga (75),  Calocedrus (72), Umbellularia (69), and Prunus (61). The remaining reported genera are all less.


Origin of Reports 4/28/2025 (California counties): San Francisco (1865), Alameda (1001), San Mateo (809), Santa Clara (658), Contra Costa (364), Los Angeles (313), Napa (292), Marin (238), Sacramento 201), Shasta (156), Sonoma (164), Ventura (185), Shasta (156), Santa Cruz (143), El Dorado (155), San Joaquin (127), Yolo (112), Solano (109), Mariposa (102), Trinity (79), Monterey (76) and Santa Barbara (65) Riverside (50) Orange (38) San Diego (36), Stanislaus (35,) Chico (22), Nevada (22) Fresno (17), Tulare (16) San Bernadino (13), Tuolome (13), Amador (12) The remaining (all 10 or fewer) are Calaveras, Kern, Lake, Lassen, madera, Merced, Placer, Plumas, San Luis Obispo, Sierra, Siskyou, Sutter, Tehama, and Yuba.

Keep in mind that if a county reports a lot of failures it does not mean that more failures happen there than in others. It all depends on where cooperators live and the species common in their locations.