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Air Quality Color Key

Ozone: USEPA 8-hour Average (ppb)

0-54 Good  
55-70 Moderate  
71-85 USG*  
86-105 Unhealthy  
106+ Very Unhealthy  

Inhalable Particles: USEPA 24-hour Average (μg/m³)

0-12.0 Good  
12.1-35.4 Moderate  
35.5-55.4 USG*  
55.5-150.4 Unhealthy  
150.5+ Very Unhealthy  
* USG: Unhealthy for Sensitive Groups. This range and above exceeds federal clean air standards.
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