In the air of Polotsk in the area of residential building No. 9 on Yubileynaya St. on September 15, 2022 at 07:40 h. the concentration of nitrogen oxide was 1.2 MPC (a south wind with a speed of 2 m /s was observed, the air temperature was +10.2°C, relative humidity – 99%); at 18:20 h. – 1.02 MPC (a weak south-easterly wind was observed, the air temperature was +14.7°C, relative humidity – 87%); September 20, 2022 at 19:20 h. – 1.2 MPC (calm was observed, the air temperature was +11.3°C, relative humidity – 91%); at 20:20 ch . – 1.5 MPC (mild calm was observed, the air temperature was +10.0°C, relative humidity – 96%); at 21:00 h. – 1.3 MPC (calm was observed, the air temperature was +9.8°C, relative humidity – 96%).
In the air of Gomel in the area of Barykina str., 319 on September 15, 2022 at 16:40 h. the concentration of carbon oxide was 1.7 MPC (there was a weak south-westerly wind, the air temperature was +16.8°C, relative humidity – 93%); on September 20, 2022 at 08:40 h. – 1.06 MPC (there was a south wind with a speed of 2 m/s, the air temperature was +6.8°C, relative humidity – 98%), at 20:20 h. – 1.08 MPC (there was a weak south wind, the air temperature was +11.2°C, relative humidity – 83%).
In the air of Mogilev, in the area of Kashtanova str., 5 on September 17, 2022, the average daily concentration of nitrogen dioxide exceeded the MPC standard by 1.8 times, there was a south, south-west, west wind with a speed of 1 – 4 m/s, gusts up to 12 m/s, the air temperature ranged from +7.7°C to +16.9°C, relative humidity – from 45% to 89%); on September 19, 2022 – by 1.1 times (northern, south-western, western and north-westerly wind with a speed of 1 – 4 m/s, the air temperature ranged from +7.4°C to +12.7°C, relative humidity – from 73% to 97%). In the specified area, on September 17, 2022, 2 cases of exceeding the maximum one–time MPC for nitrogen dioxide were also recorded: at 13:00 h. the concentration of nitrogen dioxide was 1.1 MPC (a westerly wind with a speed of 4 m/s was observed, the air temperature was +15.8°C, relative humidity - 50%); at 19:00 ch . – 1.2 MPC (there was a southwest wind with a speed of 3 m/s, the air temperature was +16.4°C, relative humidity – 45%).
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