Summary statistics for pollutants and meteorological data overall and by school for 28 October 1996 to 28 February 1997
| Measure | No. of recordings (max=124) | Mean | SD | Min | 10th centile | 90th centile | Max |
|---|---|---|---|---|---|---|---|
| mma, maximum moving average. | |||||||
| Rural (nationally validated) | |||||||
| NO2 24 h ave. (ppb) | 110 | 17.4 | 8.5 | 3.0 | 6.8 | 29.2 | 39.3 |
| NO2 1 h max. (ppb) | 114 | 28.5 | 11.0 | 7.0 | 14.0 | 43.0 | 67.0 |
| O3 1 h max. (ppb) | 124 | 25.8 | 11.1 | 1.0 | 8.0 | 38.0 | 49.0 |
| O3 8 h mma (ppb) | 118 | 21.6 | 11.1 | 1.9 | 4.6 | 33.6 | 43.3 |
| SO2 24 h ave. (ppb) | 115 | 5.1 | 4.7 | 0.0 | 1.2 | 10.0 | 35.6 |
| PM10 24 h ave. (μg/m3) | 74 | 21.2 | 11.5 | 7.0 | 11.0 | 33.0 | 82.0 |
| Rural (locally validated) | |||||||
| NO2 24 h ave. (ppb) | 110 | 16.5 | 8.7 | 2.2 | 5.6 | 27.7 | 38.9 |
| NO2 1 h max. (ppb) | 110 | 28.1 | 11.4 | 5.6 | 12.1 | 44.2 | 70.5 |
| O3 1h max. (ppb) | 118 | 25.9 | 10.8 | 2.1 | 8.4 | 37.4 | 46.6 |
| O3 8 h mma (ppb) | 115 | 21.6 | 10.8 | 2.5 | 5.1 | 34.1 | 41.1 |
| SO2 24 h ave. (ppb) | 115 | 5.4 | 5.1 | 0.0 | 1.2 | 10.8 | 39.1 |
| PM10 24 h ave. (μg/m3) | 119 | 18.7 | 11.3 | 6.6 | 9.0 | 32.5 | 87.9 |
| Urban1 | |||||||
| NO2 24 h ave. (ppb) | 118 | 17.1 | 8.6 | 2.4 | 5.9 | 28.8 | 39.6 |
| NO2 1 h max. (ppb) | 118 | 28.0 | 12.0 | 6.9 | 11.5 | 41.8 | 69.0 |
| O3 1 h max. (ppb) | 118 | 23.1 | 10.2 | 3.3 | 6.0 | 34.5 | 42.0 |
| O3 8 h mma (ppb) | 118 | 19.0 | 10.6 | 2.3 | 4.7 | 32.8 | 38.3 |
| SO2 24 h ave. (ppb) | 108 | 6.0 | 6.0 | 0.5 | 1.6 | 12.8 | 32.5 |
| PM10 24 h ave. (μg/m3) | 116 | 18.4 | 9.8 | 4.7 | 10.5 | 32.0 | 62.8 |
| Urban2 | |||||||
| NO2 24 h ave. (ppb) | 121 | 19.2 | 8.1 | 4.3 | 8.7 | 29.6 | 42.9 |
| NO2 1 h max. (ppb) | 121 | 31.8 | 13.0 | 8.1 | 16.5 | 45.6 | 98.4 |
| PM10 24 h ave. (μg/m3) | 113 | 22.7 | 10.6 | 6.7 | 12.5 | 36.0 | 63.7 |
| SO42− 24 h ave. (μg/m3) | 119 | 1.3 | 1.1 | 0.3 | 0.5 | 2.4 | 6.7 |
| Temperature 24 h ave. | |||||||
| Rural (°C) | 119 | 4.9 | 3.6 | −1.8 | 0.2 | 9.6 | 15.0 |
| Urban1 (°C) | 123 | 4.7 | 3.8 | −2.6 | 0.0 | 9.4 | 14.6 |