According to a May 21, 2008 News Release from the Public Employees for Environmental Responsibility (PEER), the EPA, responding to an order by Congress to re-open its closed libraries, will re-open four libraries effective September first. However, space allocated to the libraries will be considerably diminished unless plans change. For example, the Chicago regional library which serves the six-state Great Lakes area will occupy a vacant reception area on the 16th floor of a federal building that is one-tenth the size of its former area; the Dallas regional library serving five states will operate 6 hours a day 4 days a week using 2 staff workstations and 1 patron work station.
The EPA has more information about its current library services and repositories on its National Library Network page.