National Institute of Meteorology and Hydrology
National Institute of Geophysics, Geodesy and Geography
| POLLUTANTS |
| Nitrogen dioxide (NO2) |
| 72-hours forecast |
| Sulfur dioxide (SO2) |
| 72-hours forecast |
| OZONE |
| 72-hours forecast |
| First day |
| Daily maxima |
| 8-hour daily maxima |
| Second day |
| Daily maxima |
| 8-hour daily maxima |
| Third day |
| Daily maxima |
| 8-hour daily maxima |
| PM10 |
| 72-hours forecast |
|
Description of Bulgarian Chemical Weather Forecast and Information System (ver. 2.1)(PDF) |
Bulgarian legislation for Nitrogen Dioxide (NO2):
Hourly threshold value (HT): 200 μg/m3
Permitted number of exceedings of HT in a year: 18
Yearly threshold value (YT): 40 μg/m3
Permitted number of exceedings of YT: impermissible
Alert threshold (hourly value): 400 μg/m3
Hourly threshold value (HT): 200 μg/m3
Permitted number of exceedings of HT in a year: 18
Yearly threshold value (YT): 40 μg/m3
Permitted number of exceedings of YT: impermissible
Alert threshold (hourly value): 400 μg/m3
