Air Quality Monitoring Data Trends
Number of Eight-Hour Carbon Monoxide Exceedance Days in the Maricopa County Maintenance Area.
2nd Highest Eight-Hour Carbon Monoxide Concentrations in the Maricopa County Maintenance Area.
Violations of the 0.075 ppm Eight-Hour Ozone Standard in the Maricopa Nonattainment Area.
Highest 3-Year Average of the 4th Highest 8-Hour Ozone Concentration in the Maricopa Nonattainment Area.
Number of 24-Hour PM-10 Exceedance Days in Maricopa County and the PM-10 Nonattainment Area.