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Common air pollutants with known health impacts were first regulated as “Criteria Pollutants” by the
1970 Clean Air Act which established health-based National Ambient Air Quality Standards (NAAQS). The six criteria pollutants are carbon monoxide, ground-level ozone, lead, nitrogen dioxide, particulate matter, and sulfur dioxide.
Criteria pollutants are measured using the Mecklenburg County ambient air monitoring network. The information gathered is used to help determine if our local air quality attains the federal health-based NAAQS, as shown below. Visit the
Air Quality Monitoring website to access current criteria pollutant data.
Mecklenburg County currently meets all federal, health-based air quality standards.
Particulate Matter (PM10)
Definition of Terms:
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