Check your area's AQI (air quality index).
(Michel de Nijs/iStockphoto)
This is particularly important for those who are in a population vulnerable to air pollutants, with heart disease, chronic obstructive pulmonary disease, or asthma, say. The federal government updates ozone and particulate matter levels at AIRNow.gov, which can be searched by zip code and offers daily forecasts and general guidance for the overall public, as well as those who are more sensitive to the pollutants. Local newspapers and web sites, of course, may also publish the daily air quality information.