Air quality index United Kingdom United Kingdom

| Index_ | Ozone_Running_8_hourly_mean_μg_m_3_ | Nitrogen_Dioxide_Hourly_mean_μg_m_3_ | Sulphur_Dioxide_15_minute_mean_μg_m_3_ | PM10_Particles_24_hour_mean_μg_m_3_ | PM2_5_Particles_24_hour_mean_μg_m_3_ |
|---|---|---|---|---|---|
| 1 | 0-33 | 0-66 | 0-88 | 0-11 | 0-16 |
| 2 | 34-65 | 67-133 | 89-176 | 12-23 | 17-33 |
| 3 | 66-99 | 134-199 | 177-265 | 24-34 | 34-49 |
| 4 | 100-120 | 200-267 | 266-354 | 35-41 | 50-58 |
| 5 | 121-140 | 268-334 | 355-442 | 42-46 | 59-66 |
| 6 | 141-159 | 335-399 | 443-531 | 47-52 | 67-74 |
| 7 | 160-187 | 400-467 | 530-708 | 53-58 | 75-83 |
| 8 | 188-213 | 468-534 | 709-886 | 59-64 | 84-91 |
| 9 | 214-239 | 535-599 | 887-1063 | 65-69 | 92-99 |