The Bay Area is among the top 25 metros in the U.S. with the worst ozone pollution, according to the American Lung Association's 2025 State of the Air report. Why it matters: Inhaling smog has been ...

SAN FRANCISCO (KGO) -- Bay Area air quality remains among the most polluted in the entire country, according to the "State of the Air" report by the American Lung Association. Out of more than 200 ...