Overnight Rains Led To A Rapid Improvement In Delhi’s Air Quality On November 10. At 9 AM On November 10, Delhi’s Air Quality Index (AQI) Stood At 376 Rapidly Improving From 408 At 7 AM And 460 At 11 PM On November 9, Reported PTI. According To The IMD, The Safdarjung Observatory, Delhi’s Major Meteorological Station, Recorded 6 Mm Of Rain In 24 Hours Ending At 8:30 Am On November 10. According To The Department’s Data, Most Of The National Capital Experienced Light Rain. Light To Moderate Rain Poured In Noida, Gurugram And Other Nearby Locations.