Tehran Air Quality Monitoring Reveals Troubling Conditions

Air quality was “good” on only three days in the year ending March 15, 2023, charts published by Tehran Air Quality Control Company’s website, Airnow.tehran.ir, show. 
The company said 191 days turned out to be moderate, 133 days remained unhealthy for sensitive groups, two days were unhealthy and two days were hazardous.
The index categorizes air conditions according to a measure of polluting matters into good (0-50), moderate (51-100), unhealthy for sensitive groups (101-150), unhealthy (151-200), very unhealthy (201-300) and hazardous (301-500).
TAQCC indicates that AQI did not hit “good” quality during Feb. 13-March 15.
Statistics show that the “moderate” status was recorded on 20 days, as AQI hovered between 51 and 100 during the period.