Napa ranks high in Lung Association's clean air report

The number of people exposed to unhealthy levels of air pollution declined by more than 40 million, from 166 million in 2012-2014 to 125 million in 2013-2015, according to the report released early Wednesday.

Nolen explained the Clean Air Act of 1963 addresses the problem by mandating states recognize their own pollution may impact air quality elsewhere.

For particle pollution, the association has data only for Lackawanna and Monroe counties in Northeast Pennsylvania.

All cities in OH continue to show progress in reducing air pollution, especially in year-round particle pollution and ozone. Summit and Stark counties each had one day, which ranked the region 49 among 186 metropolitan areas in the country, according to the report.

The American Lung Association report revealed approximately 125 million Americans across the country or 40 percent of the nationwide population, are now living amid unhealthy air pollution levels, National Geographic reports.

But it could be very risky for children, the elderly and people with preexisting lung or heart conditions.

Santa Barbara County received an "F" for its ozone grade, but got an "A" in the short-term particle pollution category, and passed for annual particle pollution.

Other notable Golden State areas cited in the findings include Visala/Hanford, which is the worst for year-round particle pollution, and Los Angeles/Long Beach, which has the highest levels of ozone year-round.

It also can cause heart and lung health problems and is a leading greenhouse gas contributor to climate warming.

More news: Secret Service limits sidewalk access south of White House

There is some good news in the report, although it comes with a caveat.

"Inhaling ozone pollution acts like a sunburn of the lung, and can trigger coughing and asthma attacks, and may even shorten life", stated the report.

The State of the Air report shows setbacks in the fight against soot or particle pollution, which can come from wood combustion and diesel engines.

Overall, the Bay Area's particle pollution ranked sixth nationwide for the number of unhealthy days and fourth nationwide for year-round levels.

"While California experienced a wet winter this year, the report continues to demonstrate the impacts of drought weather conditions slowing the progress in reducing particle pollution in the San Joaquin Valley over the past few years", the association said in the California overview.

California cities top the list of those most polluted by short-term particle pollution, among them Bakersfield, Fresno, San Jose, and San Francisco.

"While California continues to move forward with policies like strong standards to reduce vehicle emissions, the federal government wants to move backwards", said Diaz-Lapham.

Meanwhile, legislators recently reintroduced the Ozone Standards Implementation Act, which would increase the time period between EPA assessments of air quality standards from five years to 10.

The air in the Tri-Cities has never been cleaner, according to the newest "State of the Air" report from the American Lung Association.