05/10/2026
San Bernardino County’s air quality improved slightly, but the region still ranks among the worst in the nation for ozone pollution.
The latest American Lung Association report found residents are still experiencing roughly five months of unhealthy air each year, putting children, seniors and people with asthma or heart disease at greater risk.
The Los Angeles metro area, including San Bernardino County, once again ranked as the most ozone-polluted region in the country.
Experts say wildfire smoke, extreme heat and climate change contribute to smog across Southern California.
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