India

Believe it or not! Day after diwali, the air is less poisonous this year compared to 2017

The air quality on Thursday morning deteriorated to 'hazardous' in Delhi-NCR, with Anand Vihar recording 999 AQI, Chanakyapuri at 459, and areas around Major Dhyan Chand National Stadium at 999.

New Delhi: Even as a thick haze engulfed Delhi on Thursday with the air quality deteriorating to ‘hazardous’ level – many areas around Anand Vihar and Major Dhyan Chand National Stadium recorded 999 AQI – data shows the air on the day after Diwali this year is less poisonous compared to 2017.

Although this year the Supreme Court had allowed people to burst crackers from 8pm to 10pm, last year it had imposed a complete ban on bursting of firecrackers. Both the years, people remained unmindful of the SC’s orders and continued bursting firecrackers till late leading to severe deterioration in air quality.

The CPCB assessed ambient Air Quality at 26 locations. The level of pollutants showed an increase on the Diwali Day and major changes were observed after 8 pm, when the fireworks started.

The data showed that PM10 value exceeded 1000 µg/m3 at Jahangirpuri, Ashok Vihar, Nehru Nagar, Wazirpur, Anand Vihar, Punjabi Bagh and RK Puram, while it was above 500 µg/m3 but below 1000 µg/m3 in Sonia Vihar, Patparganj, Vivek Vihar, Major Dhyanchand National Stadium, Jwaharlal Nehru Stadium, Dwarka, Mundka, Rohini, Okhla, Bawana and IGI Airport. The value of PM 10 was less than 500 µg/m3 in Najafgarh, Alipur, Narela, Dr. Karni Singh shooting range, Shri Aurobindo Marg, Pusa, Civil Lines and Mandir Marg.

Real time monitoring of noise levels was also monitored at five stations – RK Puram, Mandir Marg, Punjabi Bagh, Civil Lines and Anand Vihar – and data showed that the noise pollution this year was more than last year. The range observed in 2018 was from 64.4 dB (A) to 74.0 dB (A), while last year, the range varied from 61.4 dB (A) to 68.2 dB (A).

Comparing the level of certain pollutants in 2018 and 2017 (CPCB data):

Carbon Monoxide (CO)

People walk on Rajpath road engulfed in thick haze, in New Delhi, on Thursday. (PTI)

On Diwali day 2018, the average concentration (for 24 hrs) for CO ranged from 0.8 mg/m3 to 4.0 mg/m3. The minimum value was observed at 2pm and maximum value was observed at 11pm.

The location wise minimum concentration was observed at Najafgarh (0.6 mg/m³) and maximum concentration was observed at Anand Vihar (4.4 mg/m³).

On Diwali day in 2017, the average concentration (for 24 hrs) for CO ranged from 3.0 mg/m3 to 3.7 mg/m3. The minimum avg. value was observed at Punjabi Bagh and maximum avg. value was observed at RK Puram.

Oxides of Nitrogen (NO2)

A digital board displaying the Air Quality Index on the compound wall of a weather observatory, at Lodhi Road in New Delhi on Thursday. (PTI)

On Diwali day 2018, the average concentration (for 24 hrs) for NO2 ranged from 29 µg/m3 to 83 µg/m3. The minimum value was observed at 1pm and maximum value was observed at 11pm.

The location wise minimum concentration was observed at Okhla (7.6 µg/m3) and maximum concentration was observed at Punjabi Bagh (142 µg/m3).

On Diwali Day-2017, the average concentration of NO2 (for 24 hrs) varied from 43 µg/m3 to 173.0 µg/m3. The minimum avg. value was observed at Mandir Marg and maximum avg. value was observed at Punjabi Bagh.

Sulphur Dioxide (SO2)

Firecrackers burn on a street during Diwali in New Delhi on Wednesday. (Reuters)

On Diwali day 2018, the average concentration (for 24 hrs) for SO2 ranged from 15 µg/m3 to 81 µg/m3. The minimum value was observed at 7am and maximum value was observed at 11pmThe location wise minimum concentration was observed at Narela (3.1 µg/m3) and maximum concentration was observed at Karni Singh (50.8 µg/m3).

On Diwali Day – 2017, the average concentration of SO2 (for 24 hrs) varied from 20 µg/m3 to 89 µg/m3. The minimum avg. value was observed at Mandir Marg maximum avg. value was observed at Punjabi Bagh.

Particulate Matter – PM10

Morning walkers wear pollution masks as thick haze engulfs city a day after Diwali celebrations, in New Delhi, on Thursday. (PTI)

On Diwali day 2018, the average concentration (for 24 hrs) for PM10 ranged from 167 µg/m3 to 1859 µg/m3. The minimum value was observed at 3pm and maximum value was observed at 1am.

The location wise minimum concentration was observed at Najafgarh (241 µg/m3) and maximum concentration was observed at Ashok Vihar (1494 µg/m3).

On Diwali Day- 2017, the average concentration (for 24 hrs) for PM10 ranged from 331 µg/m3 to 951 µg/m3. The minimum avg. value was observed at Civil Lines and maximum avg. value was observed at Anand Vihar.

Particulate Matter – PM2.5

A man walks across a field engulfed in thick haze, in New Delhi, on Thursday. (PTI)

On Diwali day 2018 the average concentration (for 24 hrs) for PM 2.5 ranged from 69 µg/m3 to 1560 µg/m3. The minimum value was observed at 3pm and maximum value was observed at 1am.

The location wise minimum concentration was observed at Najafgarh (143 µg/m3) and maximum concentration was observed at Ashok Vihar (1252 µg/m3).

On Diwali Day-2017, the average concentration (for 24 hrs) for PM2.5 ranged from 154 µg/m3 to 440 µg/m3. The minimum avg. value was observed at Civil Lines and maximum avg. value was observed at RK Puram.

RELATED ITEMS:
Show More