The Division of Energy conducted a survey in June 2012 regarding adoption activities within the state. In summary large jurisdictions in Missouri have adopted 2009 IECC or equivalent codes: - St. Louis metropolitan area cities of St. Louis, St. Charles, O'Fallon, Florissant, Wildwood, Affton, Manchester, Clayton and other smaller cities adopted the 2009 IECC along with St. Louis County. - Kansas City adopted the 2012 IECC with many metropolitan area cities planning to follow. The Kansas City metropolitan area city of Independence, the 4th largest Missouri city, adopted the 2012 IECC with energy conservation provisions mostly optional but encouraged. - The 3rd largest Missouri city, Springfield, located in southwest Missouri, adopted 2012 IECC with amendments to residential construction that are equivalent to the 2006 IECC. - The 5th largest Missouri city, Columbia, located in central Missouri adopted the 2012 IECC.