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In the southwestern Pennsylvania region, air was unhealthy to breathe for 57 days in 2020.
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Environmental advocacy nonprofit PennEnvironment released a letter Wednesday signed by 100 Pittsburgh businesses and organizations in support of a plastic bag ban, an ordinance expected to come before City Council later this fall.
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The 10 biggest industrial air polluters in Allegheny County released higher levels of toxic emissions in recent years.
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The Allegheny County Health Department issued an air pollution watch for the Mon Valley on Wednesday morning. Air quality readings at the Liberty Monitor…
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The Allegheny County Health Department has reached a settlement with a steel company over emissions violations at its Harrison Township processing…