Tab. II.4.1.2 The assessment of the measured PM10 concentrations, localities Ústí n.L.-město and Ústí n.L.-Kočkov, 2004–2006
| PM10 | Ústí n. L.-město | Ústí n. L.-Kočkov | ||||
| 2004 | 2005 | 2006 | 2004 | 2005 | 2006 | |
| average annual concentration [μg.m-3] | 44 | 42 | 44 | 32 | 28 | 29 |
|
number of exccedances of the 24-hour air pollution limit value 50 μg.m-3 |
96 | 105 | 87 | 39 | 34 | 29 |
|
concentration classes |
||||||
| 0–50 μg.m-3 | 265 | 254 | 264 | 326 | 324 | 333 |
| 51– 100 μg.m-3 | 79 | 87 | 68 | 34 | 32 | 21 |
| 101–150 μg.m-3 | 11 | 16 | 7 | 3 | 2 | 6 |
| > 150 μg.m-3 | 6 | 2 | 12 | 2 | 0 | 2 |
|
number of episodes with concentrations higher than 50 μg.m-3 according to their length |
||||||
| 1 day | 10 | 3 | 12 | 8 | 3 | 6 |
| 2 days | 8 | 3 | 8 | 6 | 8 | 2 |
| 3–5 days | 7 | 9 | 9 | 1 | 5 | 5 |
| 6–9 days | 4 | 5 | 1 | 2 | 0 | 0 |
| 10 and more days | 1 | 4 | 2 | 0 | 0 | 0 |