Effect modifiers: environmental data
| Daily mean pollutant levels* | Number of stations | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| City | Number of days | SO2 | O3 | NO2 | CO | Temp °C | Hum % | PM10 | BS |
| *Calculated on 24 hours levels (8 hours for O3 and CO) for current and previous day; units: μg/m3 except for CO (mg/m3). | |||||||||
| Barcelona | 1096 | N/A | 59.3 | 53.7 | 7.9 | 16.8 | 77.0 | 3 | 8 |
| Birmingham | 1017 | 24.3 | 44.3 | 47.9 | 1.1 | 10.0 | 78.3 | 1 | 3 |
| London | 1072 | 23.6 | 34.9 | 64.2 | 1.5 | 12.0 | 70.5 | 1 | 4 |
| Milan | 2829 | 29.1 | 43.3 | 97.9 | 5.0 | 14.0 | 68.4 | 3 | N/A |
| Netherlands | 1364 | 8.5 | 57.7 | 29.0 | 0.7 | 10.4 | 83.1 | 8 | 10 |
| Paris | 1735 | 17.7 | 36.3 | 53.9 | N/A | 12.3 | 75.3 | 4 | 12 |
| Rome | 930 | 9.8 | 26.0 | 86.5 | 3.9 | 16.2 | 60.3 | 5 | N/A |
| Stockholm | 1006 | 3.8 | 66.6 | 25.0 | 0.7 | 8.0 | 71.1 | 1 | N/A |