See the numbers for yourself
Air quality in the San Joaquin Valley regularly violates state and federal clean-air standards, threatening our health and putting the region at risk of tough sanctions. Use this site's tools to create graphs that illustrate the challenge we face.
Bad air days: See how often an air-pollution standard is violated at any California air pollution monitor.Data is from the state Air Resources Board master air quality file www.arb.ca.gov/aqd/aqdpage.htm.
Annual peaks: See the highest ozone and particulate readings per year at each California monitor. Data from ARB.
Compare your car: Look up any car or light truck that had a Smog Check test between 2004 and 2006, and see how its emissions compare to other cars of the same year, make and model. Data from the California Bureau of Automotive Repair at www.smogcheck.ca.gov.