New Delhi: Pollution levels have started increasing with the onset of winter in various states of the country including the country's capital Delhi and NCR. Air quality (AQI) has reached the 'very poor' category in many cities of Delhi, Uttar Pradesh and Haryana. The Air Quality Index (AQI) in Greater Noida and Ghaziabad adjoining the national capital Delhi has crossed 400, while in Meerut, Uttar Pradesh, the air quality has fallen to over 500 AQI, which falls under the dangerous category.

The ever-increasing pollution levels in NCR cities are raising concerns. Most of the Delhi-NCR areas are on the list of most polluted cities in the country. Greater Noida of Uttar Pradesh tops the number of these. According to central pollution control board (CPCB) data, air quality in Delhi was recorded in the 'poor' category and the air quality index (AQI) was 244. While Ballabhgarh recorded AQI 271. While in Faridabad AQI remains around 250. Which falls under the 'medium' category.

Let us tell you that there is a minimum impact when the level of pollution in the Air Quality Index is 0-50. AQI between zero to 50 'good,' 51 to 100 AQI 'satisfactory,' 101 to 200 'moderate,' 201 to 300 'poor,' 301 to 400 'very poor,' and the AQI between 401 to 500 is kept in the 'severe' ie 'hazardous' category.

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