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 · 22 paired PM2.5 hours for A ↔ B
Right now · latest linked-monitor snapshot
165 µg/m³ versus 209 µg/m³ — a 44.0 µg/m³ difference between the two linked ambient reference monitors right now.
IIT Delhi
165 µg/m³
Gargi
209 µg/m³
Ambient reference-monitor readings only. This is not a measurement of personal exposure or air inside either campus.
Now
IIT Delhi has the lower current linked-monitor PM2.5.
Paired archive
22 shared PM2.5 hours
Do the two views agree?
Same direction
The campus-linked monitor that is lower now was also lower on average across the paired archived hours in this window.
A ↔ B same-hour history
186.6 µg/m³ versus 232.1 µg/m³ — 45.5 µg/m³ lower (about 20% below Gargi) across the exact same archived hours.
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 → 2 independent monitors
Shared-hour ranking · independent monitors
22
common PM2.5 hours out of 24 archive-eligible hours in this view
1. IIT Delhi
186.6 µg/m³
2. Gargi
232.1 µg/m³
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
IIT Delhi
0%
of 22 archived PM2.5 hours ≤ 60 µg/m³
Gargi
0%
of 22 archived PM2.5 hours ≤ 60 µg/m³
These are concentration thresholds for exploring the archive, not official AQI categories and not exposure limits.
Hauz Khas
Indian Institute of Technology Delhi
Current PM2.5
165 µg/m³
Average
186.6 µg/m³
Median
165 µg/m³
Lowest
149 µg/m³
24 Oct, 10:30 am
Highest
243 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
IIT Delhi, Delhi - IITM
0.2 km from campus · IITM
Siri Fort / Green Park
Gargi College
Current PM2.5
209 µg/m³
Average
232.1 µg/m³
Median
209 µg/m³
Lowest
203 µg/m³
24 Oct, 9:30 am
Highest
291 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
Sirifort, Delhi - CPCB
0.5 km from campus · CPCB
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.