What can I do?

Become aware of your personal sensitivity to air pollution, and pay attention to local air quality forecasts, which are posted on the homepage. On Air Quality Alert Days, everyone should minimize exposure to outside air and reduce polluting activities as much as possible. Commuters and employers can both make a difference.

The highest ozone levels usually occur from 2 to 7 p.m., primarily in the hot summer months from May to September.

Unhealthy levels of particle pollution can peak at any time throughout the year and at any time of the day. Particle pollution can be just as high indoors as it is outdoors.