Campus comparison · owned archive

Which campus reference has actually been cleaner?

Compare two to five Delhi campuses over the same archived hours. Current readings remain visible, but the ranking comes from shared historical coverage rather than whichever monitor happens to look better right now.

Official archive-first current layer · The page renders from Delhi Air Health's hourly CPCB-linked archive first, so a slow upstream API cannot hold the interface open. Source timestamp and monitor provenance stay attached to every value.

Audit the data →

Owned archive · campus comparison

Compare the same hours, not just the latest snapshot.

Ranking uses only archived hours where every selected campus reference monitor has a PM2.5 value. That keeps missing data from quietly giving one campus an easier comparison window.

UCMS

AIIMS

MAMC

Archive boundary

Archive began 6 Sept 2026, 4:00 pm. The requested 7-day period extends earlier than the dataset, so the chart and coverage denominators begin at the first archived hour instead of counting pre-archive time as missing.

Shared-hour ranking

common PM2.5 hours out of 46 archive-eligible hours in this view

1. MAMC

53.7 µg/m³

2. UCMS

56.9 µg/m³

3. AIIMS

68.7 µg/m³

Lower here means a lower average PM2.5 at the linked reference monitor across the exact same archived hours. It is not a long-term health ranking of the campuses.

Threshold context

How often was archived PM2.5 at or below a chosen level?

UCMS

55%

of 40 archived PM2.5 hours ≤ 60 µg/m³

AIIMS

48%

of 40 archived PM2.5 hours ≤ 60 µg/m³

MAMC

57%

of 40 archived PM2.5 hours ≤ 60 µg/m³

These are concentration thresholds for exploring the archive, not official AQI categories and not exposure limits.

Side-by-side history

Same timeline, every selected reference monitor.

Dilshad Garden

UCMS

University College of Medical Sciences

Current PM2.5

62 µg/m³

Average

56.9 µg/m³

Median

57.5 µg/m³

Lowest

42 µg/m³

6 Sept, 5:30 pm

Highest

73 µg/m³

8 Sept, 1:30 am

Data coverage

40/46 eligible h · 87%

Denominator starts at this monitor's first archived observation in the selected archive window; later missing hours stay missing.

Reference monitor

IHBAS, Dilshad Garden, Delhi - CPCB

0.7 km from campus · CPCB

Open UCMS history →

Ansari Nagar

AIIMS

AIIMS New Delhi

Current PM2.5

83 µg/m³

Average

68.7 µg/m³

Median

63.5 µg/m³

Lowest

52 µg/m³

6 Sept, 7:30 pm

Highest

91 µg/m³

7 Sept, 11:30 pm

Data coverage

40/46 eligible h · 87%

Denominator starts at this monitor's first archived observation in the selected archive window; later missing hours stay missing.

Reference monitor

Sirifort, Delhi - CPCB

1.6 km from campus · CPCB

Open AIIMS history →

Bahadur Shah Zafar Marg

MAMC

Maulana Azad Medical College

Current PM2.5

60 µg/m³

Average

53.7 µg/m³

Median

55.5 µg/m³

Lowest

31 µg/m³

6 Sept, 5:30 pm

Highest

79 µg/m³

7 Sept, 11:30 pm

Data coverage

40/46 eligible h · 87%

Denominator starts at this monitor's first archived observation in the selected archive window; later missing hours stay missing.

Reference monitor

ITO, Delhi - CPCB

0.8 km from campus · CPCB

Open MAMC history →

Interpretation boundary

This compares the nearby monitoring stations associated with each campus, not personal exposure and not air inside classrooms, hostels or hospitals. Campuses that share one physical reference monitor are explicitly marked; duplicated station data are not evidence of an independent campus difference. 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 selected reference monitor.