Forecast for the Phoenix metropolitan area: April 17-21, 2017:
Ozone
Unhealthy For Sensitive Groups and Ozone HPA (Mon)
Middle Moderate (Tue, Wed, Thur)
Upper Moderate (Fri)*
PM-2.5 (Smoke/Fine Particles)
Good (Mon-Fri)*
PM-10 (Dust/Coarse Particles)
Good (Mon-Fri)*
List of Recommendations for Each Range in the AQI:
Good: No restrictions on outdoor activities.
Moderate: Outdoor activity is reasonable though people should be cautious of weather conditions and pollutants in their area.
Unhealthy for sensitive people: Outdoor activity should be limited. People with respiratory problems or young children with developing lungs should stay indoors.
Unhealthy: Outdoor activities for all persons should be limited.
Very unhealthy: Outdoor activities are not recommended for any population.
Source: Maricopa County Air Quality Department