Graphic Yearbook 2014
Tab. I.4 WHO Air Quality Guidelines for the protection
of vegetation (WHO 2000)
Pollutant |
Averaging interval | Vegetation category | Guideline value |
| NO2 | calendar year | 30 µg.m-3 | |
| 24 hours | 75 µg.m-3 | ||
| SO2 | year and winter period | agricultural crops | 30 µg.m-3 |
| year and winter period | forests and natural vegetation | 20 µg.m-3 | |
| calendar year | lichens | 10 µg.m-3 | |
| Časový intervalTime period | |||
| O3 | AOT40, calculated from 1h values between May and July | agricultural crops | 6,000 µg.m-3.h |
| AOT40, calculated from 1h values between April and October | forests | 20,000 µg.m-3.h | |
| AOT40, calculated from 1h values between May and July | semi-natural vegetation | 6,000 µg.m-3.h |
