Ozone is the main ingredient in the pollution haze commonly called “smog”. Primarily a problem in the summertime, ozone is a colorless gas formed through a complex series of photochemical reactions involving sunlight and heat.
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5/16/2012Board of Directors Special Meeting More Information: 5/16/2012 Agenda (442 kb PDF, 8 pgs)
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Assessing the Contribution of Residential Wood Burning to PM
In winter months, PM2.5 concentrations in the Bay Area occasionally exceed the national 24-hour PM2.5 standard (35 µg/m3). Staff conducted analyses of chemical measurements of particles and found that emissions from wood burning can significantly contribute to the Bay Area’s PM2.5 levels. In order to better assess the contribution of wood burning, staff analyzed wood burning surveys and Census data to refine PM emissions estimates from wood burning and provided technical information to the District’s wood burning rule development effort. Additional study is underway to compare the contribution of wood burning emissions to Bay Area PM2.5 levels against other major PM2.5 sources, such as on-road and off-road vehicles.