Swiss air quality technology company, IQAir, released its 7th annual World Air Quality Report, highlighting trends in air ...

the AQI increases but by a factor of less than two depending on where the number lies on the AQI scale. AirNow uses the official EPA air monitors, sometimes called federal reference method (FRM) ...

The Air Quality Index (AQI) is a scale used to measure and communicate how polluted the air is or is expected to become. It provides insights into the levels of key pollutants in the air ...

Depending on the different pollutants in the air, like pollen or wildfire smoke, some days can be easier to breathe than ...

On Thursday afternoon, the air pollution level in Xi'an was 159 -- unhealthy on the AQI scale. One Weibo user said: "Are you trying to kill the sanitation workers? The air is full of dust ...

The Jefferson County Department of Health issued a Code Red Air Quality Alert for PM2.5 levels for Tuesday, March 11, warning ...

The AQI scale is as follows: 0-50 is good, 51-100 is satisfactory, 101-200 is moderate, 201-300 is poor, 301-400 is very poor, and 401-500 is severe. On Thursday, the AQI at 12 pm was 126 but ...

Knoxville's mountainous skyline is covered in a hazy layer of smoke Wednesday, March 12. Air quality in the region is considered unhealthy for "sensitive groups," according to the Knox County ...

The AQI scale classifies air quality into six distinct levels: 0-50 is categorised as 'Good,' 51-100 is 'Satisfactory,' 101-200 is 'Moderate,' 201-300 is 'Poor,' 301-400 is 'Very Poor,' and 401 ...

The AQI across Delhi-NCR improved to 'moderate' or 'satisfactory' early Monday after experiencing 'poor' levels the previous ...