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People, livestock, plants, automobiles, etc. all contribute collectively to our emissions problem. EPA has set standards for states to meet and has designated “non attainment” areas for counties that are currently exceeding those standards. Twenty-four of Pennsylvania's counties currently do not meet these standards for fine Particulate Matter (PM2.5) or 8 hour Surface Ozone (O3). The counties EPA listed for non-attainment in PA include: Allegheny, Armstrong, Beaver, Berks, Bucks, Butler, Cambria, Chester, Cumberland, Dauphin, Delaware, Fayette, Greene, Indiana, Lancaster, Lawrence, Lebanon, Lehigh, Montgomery, Northampton, Philadelphia, Washington, Westmoreland, and York. Click here (PDF, 274KB) for a map of these counties.