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Performance Measure #4

Performance Measure #4

Indicator: Ozone Parts Per Million (PPM)

Are motor vehicle emissions decreasing per capita?

ozone readings chart

Notes: Ozone is created by a chemical reaction between Nitrogen Oxides (NO) and Volatile Organic Compounds (VOC).  NO and VOC emissions occur from multiple sources including aircraft, trains, boats, lawnmowers, cars, trucks, and manufacturing facilities.  In 2006 in Shelby County, vehicle emissions (cars and trucks) counted for 25% of VOC and 56% of NO.  This number is projected to decrease to 12% and 28% respectively by the year 2021. The data source is the Shelby County Health Department.



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