From Federation of Earth Science Information Partners

Are healthy children part of the "Unhealthy for Sensitive Groups" category? How are your particle pollution maps calculated? How do we know if it's OK to let the kids play/do sports outside? What are the standards for the six common (criteria) pollutants? What is particle pollution? What is the AQI? Where can I find air quality trends? Where can I find historical or archived data? Which cities have the best (or worst) air quality? Why is a particle pollution map not available? Will a mask protect me from wildfire smoke?