Table 1.
NO2 air monitor summary statistics, stratified by region.
| Region | Median Year | Monitors (n) | Min NO2 (ppb) | Max NO2 (ppb) | Mean NO2 (ppb) | Std Dev NO2 (ppb) | 25th perc* | 50th perc* | 75th perc* | 90th perc |
|---|---|---|---|---|---|---|---|---|---|---|
| N America | 2011 | 731 | 0 | 44 | 13.1 | 8.2 | 6.7 | 11.3 | 17.3 | 24.3 |
| S America | 2011 | 105 | 1 | 35 | 12.7 | 7.6 | 7.0 | 10.5 | 18.6 | 23.2 |
| Europe | 2012 | 2351 | 0 | 47 | 11.8 | 6.8 | 7.0 | 11.0 | 15.5 | 21.5 |
| Africa | 2013.5 | 63 | 2 | 19 | 7.3 | 3.8 | 4.5 | 7.0 | 8.8 | 13.0 |
| Asia | 2012 | 1886 | 1 | 59 | 14.1 | 7.7 | 8.5 | 13.0 | 18.3 | 58.7 |
| Oceania | 2011 | 84 | 1 | 23 | 6.7 | 4.5 | 3.4 | 6.0 | 9.3 | 12.7 |
| Global | 2013 | 5220 | 0 | 59 | 11.5 | 7.5 | 7.3 | 11.4 | 16.7 | 23.0 |
*
percentile.