The San Joaquin Valley Air Pollution Control District (air district), and the local Air Board that controls it, has a problem. The No. 1 air quality issue in the San Joaquin Valley is the level of fine particulate matter (PM2.5) experienced by residents each winter. It devastates the health of thousands of Valley residents, and the past two winters have been the worst on record for this type of pollution. The federal deadlines for demonstrating compliance with Clean Air Act health standards for PM2.5 have passed. The cleanup plans approved by the Air Board several years ago have failed dramatically.