| Air Quality Zone | NO2 Max. 1h (µgm−3) | Mean Difference (µgm−3) | Maximum Difference (µgm−3) |
| Madrid | 76 | −2.53 | −11.30 |
| Corredor del Henares | 58 | −1.24 | −8.97 |
| Urbana Sur | 51 | −0.92 | −3.68 |
| Urbana Noroeste | 42 | −1.37 | −3.24 |
| Sierra Norte | 21 | −1.03 | −2.47 |
| Cuenca del Alberche | 30 | −1.63 | −2.75 |
| Cuenca del Tajuña | 24 | −0.28 | −0.69 |