The South Coast Air Quality
Management District predicted air quality that will be in the moderate
range for sensitive groups range in the South Coast Air Basin today.
The air quality rating for the San Gabriel Mountains will be 78, compared to the good range of 48 yesterday, officials said.
AQI measures the amount of pollutants in the air, whether ozone, carbon
monoxide, nitrogen dioxide or PM10 (particulate matter).
are considered "good" when AQI levels are between zero and 50. No
health impacts are expected when air quality is in this range.
AQI levels are 51 to 100, air quality is deemed "moderate," which means
that unusually sensitive people should consider limiting prolonged
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.