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Level III Ecoregions of Arizona

Revised April 2000
National Health and Environmental Effects Research Laboratory
U.S. Environmental Protection Agency

level III ecoregions of Arizona region 14   14. Mojave Basin and Range
region 20   20. Colorado Plateaus
region 22   22. Arizona/New Mexico Plateau
region 23   23. Arizona/New Mexico Mountains
region 24   24. Chihuahuan Deserts
region 79   79. Madrean Archipelago
region 81   81. Sonoran Basin and Range