CPCB Explains Differences in Delhi's AQI Readings and 500 Cap on Index
Delhi's air quality readings show discrepancies between official sources and private platforms, raising public confusion. The Central Pollution Control Board (CPCB) explained these differences stem from varying measurement methodologies, averaging periods, and equipment calibration limits, not under-reporting. The National Air Quality Index (NAQI), capped at 500 since 2015, categorizes pollution levels to communicate health risks effectively. During extreme pollution episodes, data gaps may occur due to instrument limits. The CPCB emphasizes that the NAQI reflects sustained exposure and aligns with international standards.
First-hand measurement across 6 sources
We measured how 6 outlets covered this story. No outlet gave this story a measurable political slant — there is no left–right reading to report. Overall sentiment is neutral (51/100). Lens Score 57/100.
Outlets measured: news18, deccanherald, economictimes, thetribune, news18, theprint. See how each one headlined and framed the same story in the source comparison below.
AI Analysis
Sentiment was consistent across outlets (48–52/100), indicating broadly factual reporting rather than editorialising.
Coverage timeline
theprint broke this story on 9 Nov, 05:55 pm. Other outlets followed.