Air Quality Trends
Air Quality Trends Quick Finder | |||
The Air Quality Trends graphics show air pollution concentrations in Region 9 states since the establishment of each standard. In most areas, air quality has improved since the standards were established and in some cases, has improved dramatically.
The following graphs show these results:
Carbon Monoxide (CO)
Lead (Pb)
Nitrogen Dioxide (NO2)
Ozone (O3)
Particulate Matter (PM2.5)
Particulate Matter (PM10)
Sulfur Dioxide (SO2)
For more information on air quality trends, see EPA Air Trends. For information on the health effects of air pollution see EPA AIRNOW.