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Report: Pittsburgh's air quality improving, but still among most polluted

Report: Pittsburgh's air quality improving, but still among most polluted

While the air in Pittsburgh is the cleanest it's ever been, the American Lung Association still ranks the city among the United States' most-polluted metropolises.

Pittsburgh is one of two metro areas outside of California to rank among the top 25 most polluted by ozone smog and by soot, formally called long- and short-term particle pollution, according to the American Lung Association's State of the Air 2013 report released today.

Pittsburgh was ranked 7th in short-term particle pollution, 8th in year-round particle pollution and 24th among the ozone-polluted, the lung association said.

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But the quality of air has improved in each category since last year, as "the air quality in Pittsburgh, and nationwide, continues the long-term trend to much healthier air," the group said in a press release.

The number of "unhealthy air days" decreased from 20.7 from 26.3, according to the survey.

First Published: April 24, 2013, 4:00 a.m.

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