Air quality remained far from ideal Wednesday in much of the Bay Area. As of 11:30 a.m., sensors from Purple Air showed air quality in San Francisco, Marin, the East Bay and the eastern side of ...

201–300 (purple) is very unhealthy; and, finally, anything 301 or higher (maroon) is hazardous. The agency takes five factors into account when determining air quality: ground-level ozone ...

An air quality alert was issued on Tuesday at 5:03 a.m. for Josephine County.

If the air quality in your area is compromised, there are several things you can do to protect yourself. Special attention should be paid to those who have compromised respiratory, lung or heart ...