An August 26 lawsuit by the Sierra Club and the Natural Resources Defense Council asked the U.S. Court of Appeals for the Northern District of California to compel the Environmental Protection Agency to create additional attainment and nonattainment designations for the SO2 air quality standard for 2010. 29 areas were found to violate the standard, but the agency was not able to determine additional areas by the June 3 statutory deadline because monitoring has not been completed.