Pollutant levels in affected areas are expected to reach the Unhealthy for Sensitive Groups range.
On Air Quality Alert days, it is recommended that you avoid prolonged or strenuous outdoor activity—especially if you have asthma, heart disease, or another respiratory condition.
ALT Air Quality Index chart: Image description
AQI (Air quality index) graphic of text that says 'Air Quality Index quality
Green: Good ( 0-50) considered satisfactory
Yellow: Moderate 51-100: Air quality is acceptable; however, for some pollutants there may moderate health concern for a very small number people who are unusually sensitive air pollution.
Orange: Unhealthy for Sensitive Groups (AQI 101-150): Sensitive groups may experience health effects. The general public is not affected.
Red: Unhealthy ( 151 -200) Everyone may begin experience health effects; members experience more serious health effects.
Purple: Very Unhealthy 201-300) Health alert; everyone may experience more serious health effects
Maroon: Hazardous ( 301-500): Health Warnings of emergency conditions.
*Sensitive groups include active adults, people lung disease (including asthma), older adults,