Summary Tables
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Summaries of Historical Area Designations for State Standards
These summary tables provide information on how area designations for the State ambient air quality standards have changed over time.
- Ozone
- PM2.5 (fine particulate matter)
- PM10 (suspended particulate matter)
- Carbon Monoxide (CO)
- Nitrogen Dioxide (NO2)
- Sulfur Dioxide (SO2)
- Sulfates
- Hydrogen Sulfide
- Lead
- Visibility Reducing Particles