Use the site and date selectors to plot a graph of pollutants measured at the monitoring site in micrograms per meter cubed (ug/m3).
Tip: Highlight and zoom into regions of the graph by clicking and dragging with the mouse. Hold down the shift key to pan left and right. Double click to zoom back out. Change the number in the bottom left box to change the averaging period e.g 8 hour or 24 hour.
The table below shows how the concentrations and averaging times of pollutants displayed on the graph above relate to the government's daily air quality index.
| Ozone | Nitrogen Dioxide | Sulphur Dioxide | PM2.5 Particles (EU reference equivalent) | PM10 Particles (EU reference equivalent) | ||
running 8 hourly mean | hourly mean | 15 minute mean | 24 hour mean | 24 hour mean | ||
| Band | Index | ugm-3 | ugm-3 | ugm-3 | ugm-3 | ugm-3 |
| 1 | 0-33 | 0-67 | 0-88 | 0-11 | 0-16 | |
| Low | 2 | 34-66 | 68-134 | 89-177 | 12-23 | 17-33 |
| 3 | 67-100 | 135-200 | 178-266 | 24-35 | 34-50 | |
| 4 | 101-120 | 201-267 | 267-354 | 36-41 | 51-58 | |
| Moderate | 5 | 121-140 | 268-334 | 355-443 | 42-47 | 59-66 |
| 6 | 141-160 | 335-400 | 444-532 | 48-53 | 67-75 | |
| 7 | 161-187 | 401-467 | 533-710 | 54-58 | 76-83 | |
| High | 8 | 188-213 | 468-534 | 711-887 | 59-64 | 84-91 |
| 9 | 214-240 | 535-600 | 888-1064 | 65-70 | 92-100 | |
| Very High | 10 | 241 or more | 601 or more | 1065 or more | 71 or more | 101 or more |