Delhi Air Health observatory
Explore Delhi's archived air, hour by hour.
Move through the owned CPCB-linked archive without spatial interpolation. Every station dot is the value stored for that monitor at that hour; grey means the archive has no usable value for that pollutant.
Map feeds
73
with archived coordinates
Archive span
76 archived hours
4,187 stored rows total
Owned archive · historical map
Watch the monitoring network change.
Each dot is an archived station snapshot at the selected hour. Missing observations remain grey and are never filled in from neighbouring stations or adjacent hours.
Selected hour
9 Sept, 6:30 pm
Network median
59 µg/m³
PM2.5 across reporting mapped feeds
Reporting at this hour
68/73
73 mapped feeds in the archive window
PM2.5 concentration scale · µg/m³
The colour breaks mirror familiar CPCB particulate concentration breakpoints for orientation only. These archived snapshot colours are not official AQI categories and are not spatial interpolation between monitors.
76 archived hourly positions currently available in this map dataset.
Every feed in this window has a mapped coordinate.
What moves
Observed station snapshots.
The slider changes which archived hour is rendered. The site never invents a value between two monitoring stations.
What stays fixed
Station and campus geography.
Monitor coordinates come from the archive's verified station metadata. Campus pins remain separate reference points.
Interpretation guardrail
Colour is concentration, not official AQI.
The archived feed is useful for temporal context, but a coloured station snapshot is not a complete CPCB AQI calculation or a personal-exposure estimate.