New Delhi: A haze engulfed Delhi as the air quality nosedived to "very poor" category with several areas inching towards "severe" pollution levels, authorities said Saturday.

The overall Air Quality Index (AQI) of Delhi was recorded at 337, which falls in the 'very poor' category and is the highest of this season, creating hazy conditions, said data from the Central Pollution Control Board (CPCB).

All you need to know:

1. About 31 areas in Delhi recorded 'very poor' air quality while two areas showed 'severe' air quality levels. CRRU Mathura Road and Dwarka Sector 8 witnessed 'severe' level of pollution at 414 and 402, respectively, the data said. Anand Vihar, DTU, Mundka, Narela, Nehru Nagar and Rohini all showed 'very poor' air quality, it added. 

2. An AQI between 0 and 50 is considered "good", 51 and 100 "satisfactory", 101 and 200 "moderate", 201 and 300 "poor", 301 and 400 "very poor", and 401 and 500 "severe".

3. On Wednesday and Thursday, the air quality had deteriorated to the 'very poor' category, alarming authorities who were planning to roll out more stringent measures to combat pollution. The air quality temporarily improved on Friday after rainfall, but it worsened again.

4. An official warned that the PM2.5 was reaching dangerous levels.

5. The Supreme Court appointed Environment Protection Control Authority (EPCA) had on Friday held a meeting with state governments and Delhi government officials to discuss the pollution situation in the national capital.

6. An EPCA member said stock of the situation was taken and it was decided that special attention would be given to vulnerable hotspots where 'poor' or 'very poor' air quality is observed.

7. On Saturday, the PM2.5 (presence of particles in the air with a diameter of less than 2.5 micrometres) touched a new high at 158. The PM2.5, also called "fine particulates", can be a matter of more serious health concern than PM10.

8. The PM10 level (presence of particles in the air with a diameter of less than 10 micrometres) in Delhi stood at 270 and the PM 2.5 level was recorded at 125, according to the data from the Centre-run System of Air Quality Forecasting and Research (SAFAR).

Here are some tips to fight Delhi's nasty pollution

  • Get yourself a mask and use that always. According to medical experts, the most effective masks are N95 and N99 pollution masks.
  • Try and stay indoors as much as possible. Grow indoor plants to clean air naturally. But an air purifier is needed.
  • Try doing exercises and work from home and going out can make you fall sick.
  • Wear full sleeve clothes and full pants as the pollution can irritate your skin too. 
  • Instead of brooming, pour water around your house to keep the dust settled. Also clean your house regularly. 

With inputs from PTI