Loading the owned archive and shared-hour comparison…
Compare campus air
Start with the two campuses you actually care about. Compare their latest linked-monitor PM2.5, then check whether the same pattern held across the exact same archived hours. Extra campuses stay optional context rather than crowding the main comparison.
Research status · pilot / method development
This live comparison is exploratory and is not a primary-study result. September observations are being used to validate collection, provenance, QC and analysis behavior. The frozen prospective primary period begins 1 October 2026.
Direct comparison
The default is 24 hours so a young archive does not open on a mostly empty 7-day chart. Switch to 7 days when you want a wider window.
Archive window: 24/24 hours available
Right now · latest linked-monitor snapshot
North Campus, DU, Delhi - IITM represents both campus links, so the site will not present duplicated station data as an independent campus difference.
Hindu
235 µg/m³
Hansraj
235 µg/m³
Ambient reference-monitor readings only. This is not a measurement of personal exposure or air inside either campus.
Now
These two campuses share the same reference monitor.
Paired archive
0 shared PM2.5 hours
Do the two views agree?
Same monitor
There is only one independent physical series for this pair.
A ↔ B same-hour history
Hindu and Hansraj are linked to North Campus, DU, Delhi - IITM. The archive therefore shows one physical series, not two independent campus observations.
1 duplicate campus link is collapsed because shared stations are one physical series.
Optional historical context
The direct A-vs-B result above stays pairwise. Multi-campus ranking below uses hours shared by every independent selected monitor.
2 campuses → 1 independent monitor
Shared-hour ranking · independent monitors
0
common PM2.5 hours out of 24 archive-eligible hours in this view
The selected campuses collapse to one physical reference monitor, so there is no independent historical comparison to rank.
Lower here means a lower average PM2.5 at the linked physical monitor across the exact same archived hours. It is not a long-term health ranking of the campuses.
Threshold context
Hindu + Hansraj
0%
of 22 archived PM2.5 hours ≤ 60 µg/m³ · shared monitor counted once
These are concentration thresholds for exploring the archive, not official AQI categories and not exposure limits.
University Enclave
Shared monitor · one chart lineHindu College
Current PM2.5
235 µg/m³
Average
238.6 µg/m³
Median
238 µg/m³
Lowest
224 µg/m³
24 Oct, 7:30 am
Highest
258 µg/m³
23 Oct, 7:30 pm
Data coverage
22/24 eligible h · 92%
Denominator starts at this monitor's first archived observation in the selected archive window; later missing hours stay missing.
Reference monitor
North Campus, DU, Delhi - IITM
0.7 km from campus · IITM
Malka Ganj / North Campus
Shared monitor · one chart lineHansraj College
Current PM2.5
235 µg/m³
Average
238.6 µg/m³
Median
238 µg/m³
Lowest
224 µg/m³
24 Oct, 7:30 am
Highest
258 µg/m³
23 Oct, 7:30 pm
Data coverage
22/24 eligible h · 92%
Denominator starts at this monitor's first archived observation in the selected archive window; later missing hours stay missing.
Reference monitor
North Campus, DU, Delhi - IITM
1.2 km from campus · IITM
Interpretation boundary
This compares the nearby monitoring stations associated with each campus, not personal exposure and not air inside classrooms, hostels or hospitals. Campuses sharing one physical reference monitor are grouped into one independent series for historical ranking, threshold summaries and charting. Pre-archive time is never coded as missing. Coverage is computed only over archive-eligible hours, and the ranking uses only PM2.5 hours shared by every independent selected reference monitor.
Archive-first CPCB-linked data · Latest stored source timestamp and monitor provenance are attached to every value.