160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set! AD Quality Auto 360p 720p 1080p Top articles1/5READ MOREStriving toward a more perfect me: Doug McIntyre Conditions are considered “good” when AQI levels are between zero and 50. No health impacts are expected when air quality is in this range. When AQI levels are 51 to 100, air quality is deemed “moderate,” which means that unusually sensitive people should consider limiting prolonged outdoor exertion. Air quality is designated “unhealthful for sensitive groups” when AQI levels are from 101 to 150. At this level, active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion. When AQI levels are between 151 and 200, air quality is deemed “unhealthful.” At this level, active children and adults, and people with respiratory disease, such as asthma, should avoid prolonged outdoor exertion. Everyone else, especially children, should limit prolonged outdoor exertion. “Very unhealthful” air quality is declared when the AQI registers between 201 and 300. Active children and adults, and people with respiratory disease,should avoid all outdoor exertion when the AQI is at this level. Everyone else, especially children, should limit outdoor exertion. DIAMOND BAR – The South Coast Air Quality Management District predicted air quality that will be in the good to moderate range in the South Coast Air Basin today. The forecast released by the AQMD lists the highest expected Air Quality Index level — for ozone unless otherwise noted — in each area of the South Coast Basin for today. Area AQI Forecast for Today GOOD IN THE: Antelope Valley AQI: 45 PM10/PM2.5 Northern Mojave Desert AQI: 42 Ozone Central Mojave Desert AQI: 48 PM10/PM2.5 MODERATE IN THE: Coastal Area AQI: 55 PM10/PM2.5 Metropolitan Area AQI: 57 PM10/PM2.5 San Fernando/Santa Clarita Valleys AQI: 53 PM10/PM2.5 San Gabriel AQI: 60 Nitrogen Dioxide Inland Orange County AQI: 55 PM10/PM2.5 Riverside Valley AQI: 69 PM10/PM2.5 San Bernardino Valley AQI: 63 PM10/PM2.5 Hemet/Elsinore Area AQI: 61 PM10/PM2.5 Temecula/Anza Area AQI: 53 PM10/PM2.5 San Gabriel Mountains AQI: 51 PM10/PM2.5 San Bernardino Mountains AQI: 51 PM10/PM2.5 Big Bear Lake AQI: 51 PM10/PM2.5 Banning Pass Area AQI: 53 PM10/PM2.5 Coachella Valley/Low Desert AQI: 53 PM10/PM2.5 Victor Valley AQI: 51 PM10/PM2.5 The AQI measures the amount of pollutants in the air, whether ozone, carbon monoxide, nitrogen dioxide or PM10 (particulate matter).