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Delhi wakes to severe smog after Diwali; monitors miss PM2.5 hours

Al Jazeera, citing AFP and AP, said New Delhi’s air quality index topped 350 after Diwali firecrackers. The Hindu reported 227 missing hourly PM2.5 readings that experts said understated official AQI.

What's new
  1. New headline Was: “New Delhi air hits severe range after Diwali fireworks”
  2. Our desk updated its story
  3. The Hindu is now reporting this
  4. No longer breaking. Still developing
  5. AP is now reporting this
6 earlier updates
  1. DW is now reporting this
  2. New headline Was: “Smog blankets New Delhi as Diwali firecrackers worsen air quality”
  3. Our desk filed its story
  4. Now breaking news
  5. Al Jazeera is now reporting this
  6. New headline Was: “Delhi air quality deteriorates as revellers mark Diwali with illegal fireworks”

New Delhi was under thick smog on Monday after Diwali fireworks on Sunday, Al Jazeera reported, citing AFP and AP, as The Hindu separately documented hours of missing official air-quality readings1,2.

Al Jazeera said the Air Quality Index exceeded 350 in several parts of the capital Monday morning, a level described as severe1.

Despite restrictions, residents used firecrackers Sunday evening, releasing smoke and fine particles, that account said1.

India’s Supreme Court last month limited Diwali fireworks to approved lower-emission crackers in specified three-hour windows on Saturday and Sunday, Al Jazeera reported1.

The Hindu reported that PM2.5 data from several government monitors were missing for hours during the post-Deepavali spike, including at Anand Vihar, Patparganj and Bawana2.

Manoj Kumar of the Centre for Research on Energy and Clean Air told The Hindu that 227 hourly PM2.5 observations were missing across 59 CPCB stations from midnight Nov. 8 until 5 a.m. Nov. 9, and that gaps would lower the official AQI2.

Only 14 stations reported complete data, The Hindu said, citing Kumar; Delhi Labour Minister Kapil Mishra said the government would look into the missing data2.

Al Jazeera noted New Delhi, home to about 30 million people, often ranks among the world’s most polluted capitals in winter; The Hindu did not repeat that citywide ranking in the monitor story1,2.

Sources

  1. Al JazeeraSmog blankets New Delhi as Diwali firecrackers worsen air quality
  2. The HinduAt peak of air pollution on Deepavali, data goes missing at several government monitoring stations in Delhi

How it’s being reported

2 sources

At peak of air pollution on Deepavali, data goes missing at several government monitoring stations in Delhi

data gaps and expert warning of understated AQI

5 observations across 59 CPCB stations after Deepavali, which an analyst said would lower official AQI. — The Hindu

The Hindu reported 227 missing hourly PM2.5 observations across 59 CPCB stations after Deepavali, which an analyst said would lower official AQI.

Leaves out citywide AQI 350 figure used by Al Jazeera