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Table 2

For present-day, by region, the total number of stations and number of monitors per million people. Also listed are the average population density (people/km2) at the location of the ozone monitoring station for urban and non-urban stations, and the percentage of stations classified as urban.a DOI: https://doi.org/10.1525/elementa.273.t2

RegionNorth AmericaEuropeAsia (East, South and SE)OceaniaMiddle EastSub Saharan AfricaCentral and South America

 
Total number of stations 1470 1935 1239 55 14 20 57 
Number of monitors per 100 million people 426 314 35 212 10 
Av. Urban pop. Density (people/km238,107 48,877 98,062 35,472 82,826 44,091 114,132 
Av. Non-urban pop. density (people/km23,278 6,163 9,310 4,199 3,306 9,205 7,594 
Percent of sites that are urban 21% 24% 50% 34% 50% 25% 65% 
RegionNorth AmericaEuropeAsia (East, South and SE)OceaniaMiddle EastSub Saharan AfricaCentral and South America

 
Total number of stations 1470 1935 1239 55 14 20 57 
Number of monitors per 100 million people 426 314 35 212 10 
Av. Urban pop. Density (people/km238,107 48,877 98,062 35,472 82,826 44,091 114,132 
Av. Non-urban pop. density (people/km23,278 6,163 9,310 4,199 3,306 9,205 7,594 
Percent of sites that are urban 21% 24% 50% 34% 50% 25% 65% 

a Numbers are based on warm season ozone observations during 2010–2014.

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