Travis County had 262 days with good air quality in 2016, according to the Environmental Protection Agency (EPA). This is an improvement from 2012, but short of the all-time high of 296 days of good air quality in 2004.
The EPA calculates the Air Quality Index by measuring ground level ozone, particle pollution, carbon monoxide and sulfur dioxide.
Travis County had 4 days when air quality was unhealthy for sensitive groups in 2016. Sensitive groups include people with lung diseases, children, older adults, and people who exercise or work outdoors. The EPA’s AirNow website shares local, real-time air quality data to help people protect their health.
The Austin MSA has good air quality, when compared to these select US cities. Only Portland has better air quality. Denver and Philadelphia have the fewest number of good air quality days among these cities.