Delhi's Artificial Rain Trials: A Mixed Bag for Pollution Control

Strategic Insights -

Delhi's attempts to bring down pollution levels by creating artificial rain showed some positive results, but data reveals a more complex picture. Despite claims of reduced particulate matter, official monitoring data from the Central Pollution Control Board (CPCB) and the Delhi Pollution Control Committee (DPCC) show that air quality improvements began hours before the cloud seeding operation, and levels fluctuated and even rose afterwards.

Key Takeaways:

  • The first round of cloud seeding was conducted between 12:13 pm and 2:30 pm on Tuesday, with the second round taking place between 3:45 pm and 4:45 pm.
  • According to IIT-Kanpur's preliminary report, PM 2.5 levels dropped in Mayur Vihar, Karol Bagh, and Burari after the trials, but the report did not specify when the levels were recorded.
  • DPCC data from Burari showed that PM 2.5 levels had already dropped sharply from 198 to 88 µg/m³ between 9 am and 1 pm before the first seeding window.
  • PM 2.5 levels in Mayur Vihar, Karol Bagh, and Burari showed a clear pattern of fluctuation and increase after the trials, with PM 10 following a similar pattern in some areas.
  • The report from IIT-Kanpur did not specify when PM 2.5 and PM 10 levels were recorded, which raises questions about the accuracy of the data.
  • Director Manindra Agrawal of IIT-Kanpur stated that even with low moisture levels, seeding had some impact, but not to the extent desired.

Statistics:

  • PM 2.5 levels in Mayur Vihar, Karol Bagh, and Burari dropped after the trials, with a reported PM 2.5 level drop from 221 to 207 µg/m³, 230 to 206 µg/m³, and 229 to 203 µg/m³, respectively.
  • PM 10 levels in Mayur Vihar, Karol Bagh, and Burari also showed a drop after the trials, with a reported PM 10 level drop from 207 to 177 µg/m³, 206 to 163 µg/m³, and 209 to 177 µg/m³, respectively.
  • Burari's average AQI dropped from 336 to 319 by 1 pm on Tuesday, before increasing to 144 µg/m³ by midnight.

Sources:

  • IIT-Kanpur report, February 2025.
  • Central Pollution Control Board (CPCB) monitoring data, February 2025.
  • Delhi Pollution Control Committee (DPCC) monitoring data, February 2025.
  • IIT-Kanpur director Manindra Agrawal's video message, February 2025.
  • IE Online Media Services Pvt. Ltd., distributed by Contify.com, February 2025.