The EPA has identified 13 states that need to make changes to their plans, allowing them to issue permits that include GHG emissions. These states include: Arizona, Arkansas, California, Connecticut, Florida, Idaho, Kansas, Kentucky, Nebraska, Nevada, Oregon, Texas and Wyoming.

The Clean Air Act requires states to develop EPA-approved implementation plans that include requirements for issuing air permits. When federal permitting requirements change, as they did after the EPA finalized the GHG tailoring rule, states may need to modify these plans.

In January 2011, industries that are large emitters of GHGs, and are planning to build new facilities or make major modifications to existing ones, will work with permitting authorities to identify and implement the most efficient control technologies to minimize their GHGs. This includes the nation’s largest GHG emitters, such as power plants, refineries and cement production facilities.