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Air quality in the Pittsburgh Region has dramatically improved over the past 60 years, but concerns still exist about less visible types of pollution, specifically particulate matter and ozone. These pollutants are caused by both local emission sources and by sources in upwind states.
Air quality index maps from the Environmental Protection Agency are updated hourly.
The Pittsburgh region has seen the overall quality of its air improve over the past few decades. Yet, levels of key air pollutants remain stubbornly higher those in most other regions across the nation, raising the question: Is doing better good enough?