The degree of air pollution is assessed by comparing the actual concentrations of impurities (in mg/m3, μg/m3) against the maximum permissible concentrations (MPC) of the pollutant in the air.
MPC is a concentration that does not directly or indirectly adversely affect the present or future generations throughout life, does not reduce a person’s performance capacity, does not worsen his/her well-being and sanitary living conditions. The MPC values are given in mg of substance per 1 m3 of air (mg/m3).
MPC m.o. is the maximum permissible one-time concentration of a pollutant in the air of populated areas, in mg/m3;
MPC d.a. - maximum permissible average daily concentration of a pollutant in the air of populated areas, mg/m3.
Maximum permissible concentrations of pollutants
| Impurity | MPC values, mg/m3 | ||
|
Maximum one-time (MPC m.o.) |
Average daily (MPCd.a) |
Average annual (MPCa.a) |
|
| Main pollutants | |||
| Sulphur dioxide | 0,5 | 0,05 | 0,05 |
| Carbon monoxide | 5 | 3 | 3 |
| Nitrogen dioxide | 0,085 | 0,04 | 0,04 |
| Nitric oxide | 0,4 | 0,06 | 0,06 |
| Suspended particles | 0,5 | 0,15 | 0,15 |
| Specific pollutants | |||
| Ammonia | 0,2 | 0,04 | 0,04 |
| Ozone | 0,16 | 0,03 | 0,03 |
| Phenol | 0,01 | 0,006 | 0,006 |
| Formaldehyde | 0,05 | 0,01 | 0,01 |