Tehran’s air quality index reached 85 on November 4, 1401
According to Moj news agency, according to the forecasts made in the control company Air quality in Tehran Due to the lack of effective wind during the past hours and the increase in morning traffic, the concentration of suspended particles will gradually increase and the air quality in some high-traffic areas will be in an unhealthy range for sensitive groups.
Reducing wind speed during the day will prevent the dispersion of pollutants. Also, with the continuation of these weather conditions until the end of Wednesday along with the increase in car traffic, the increase in the concentration of suspended particles and the establishment of an unhealthy situation for sensitive groups in high traffic areas will not be far from expected.
Also, on Thursday (November 5), due to the effective wind blowing, the concentration of pollutants will be somewhat reduced until Thursday morning; However, the increase in vehicle traffic will increase the concentration of suspended particles in some high-traffic areas.
The decrease in wind speed during the day will limit the dispersion of pollutants, and with the relative stability of the atmosphere until Thursday evening and the increase in evening traffic, the concentration of suspended particles will increase, which will lead to unhealthy conditions for sensitive groups in some high-traffic areas.
According to the announcement of Tehran Air Quality Control Company, currently the index pollutant is “suspended particles less than 2.5 microns” with an average of 85 and the air quality is acceptable.
The pollutant index of the air in the capital during the last 24 hours was “suspended particles less than 2.5 microns” with an average of 82, and the air quality of the capital was in acceptable conditions.
Air quality (AQI) is divided into five main categories; Based on this division, from zero to 50 “clean” air, from 51 to 100 “acceptable (healthy) or average” air, from 101 to 150 “unhealthy for sensitive groups”, from 151 to 200 “unhealthy for all” groups”, from 201 to 300 air is “very unhealthy” and from 301 to 500 air quality conditions are “dangerous”.