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)(PDF) |
Bulgarian legislation for Ozone (O3):
Daily maximum (8-hour running average) threshold (D8T): 120 μg/m3
Permitted number of exceedings of D8T in a year: 25 (mean for 3 years)
Information threshold (hourly value): 180 μg/m3
Alert threshold (hourly value): 240 μg/m3
Daily maximum (8-hour running average) threshold (D8T): 120 μg/m3
Permitted number of exceedings of D8T in a year: 25 (mean for 3 years)
Information threshold (hourly value): 180 μg/m3
Alert threshold (hourly value): 240 μg/m3
