The District of Columbia is the top region in the nation for LEED-certified commerical and institutional green buildings per capita, according to a recent Top 10 list from the USGBC. Based on U.S. 2010 Census information, the District averages 25 square feet of LEED-certified space per capita. Nevada is the leading state, with 10.92 square feet per capita. The top 10 states, plus D.C., for 2010 are:

1. D.C., 25.15 square feet • 2. Nevada, 10.92 square feet • 3. New Mexico, 6.35 square feet • 4. New Hampshire, 4.49 square feet • 5. Oregon, 4.07 square feet • 6. South Carolina, 3.19 square feet • 7. Washington, 3.16 square feet • 8. Illinois, 3.09 square feet • 9. Arkansas, 2.90 square feet • 10. Colorado, 2.85 square feet • 11. Minnesota, 2.77 square feet

According the USGBC, more than 40,000 projects are currently participating in the commercial and institutional LEED systems, which account for more than 7.9 billion total square feet of construction in all 50 U.S. states and in 117 countries. Of the projects reviewed for the per-capita list, commercial office buildings were the most common project type, while for-profit organizations were the most-common owners.