Table 1.
Summary of predicted annual pollutant levels at assessment centre locations
| 2013 | 2014 | 2015 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pollutant (μg/m3) | Mean | SD | P5 | P95 | IQR | Mean | SD | P5 | P95 | IQR | Mean | SD | P5 | P95 | IQR | % change of mean from 2013 to 2015 |
| NO2 | 68.4 | 39.5 | 30.9 | 117.3 | 36.5 | 68.2 | 36.7 | 32.3 | 117.5 | 33.7 | 69.4 | 36.1 | 33.8 | 119.4 | 33.8 | + 1.4 |
| SO2 | 38.6 | 18.9 | 11.7 | 68.4 | 20.9 | 29.4 | 15.5 | 8.4 | 52.5 | 15.5 | 23.2 | 12.3 | 6.3 | 40.3 | 13.7 | -39.9 |
| PM10 | 91.9 | 25.8 | 60.2 | 151.0 | 23.3 | 85.2 | 24.4 | 58.2 | 137.7 | 26.9 | 77.6 | 21.9 | 50.0 | 127.5 | 18.9 | -15.5 |
| PM2.5 | 83.6 | 25.8 | 56.5 | 140.5 | 24.1 | 76.3 | 23.4 | 51.3 | 128.5 | 22.4 | 65.3 | 19.9 | 44.9 | 110.2 | 19.0 | -21.9 |
| O3 | 100.9 | 37.8 | 37.5 | 161.8 | 44.3 | 95.1 | 35.6 | 35.5 | 145.6 | 48.3 | 96.8 | 36.0 | 35.9 | 149.0 | 49.4 | -4.1 |
| CO (mg/m3) | 0.59 | 0.22 | 0.24 | 0.89 | 0.34 | 0.62 | 0.23 | 0.26 | 0.95 | 0.32 | 0.64 | 0.24 | 0.26 | 0.96 | 0.36 | + 8.0 |
Summary statistics calculated across annual predicted pollutant levels at all assessment centre locations
SD Standard deviation, P5 5th Percentile. P95 95th Percentile, IQR Inter-quartile range