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 Eight-Hour Ozone Standardsin 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

Air Quality Boundaries in the MAG Region

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Air Quality Boundaries in the MAG Region

U. S. Environmental Protection Agency – Our Nation’s Air

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Our Nation’s Air

About MAG

The Maricopa Association of Governments (MAG) is a Council of Governments (COG) that serves as the regional planning agency for the metropolitan Phoenix area.

Title VI

Title VI requires that no person in the United States of America shall, on the grounds of race, color, or national origin, be excluded from the participation in, be denied the benefits of, or be otherwise subjected to discrimination under any program or activity for which MAG receives federal financial assistance.

Get in Touch

  • Address: 302 N 1st Ave., Suite 300
    Phoenix, Arizona 85003

  • Phone: (602) 254-6300

  • FAX: (602) 254-6490

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