Report · 03 August 2026

From 87 to 81. The 95 per cent interval runs -9.2 to -3.3 points, on 42 matched stations.

142

AQI at the worst station

CRRI Mathura Road, Moderate

Analysis window: 10 AM 2nd August to 10 AM 3rd August
Baseline: YoY baseline: avg of 27th Jul - 10th Aug 2025 (same +/-7 days), matched stations

Today's full report

Roughly twelve pages: the verdict on today's air, every monitoring station, the weather versus policy attribution, the full year of de-weathered trends, and the annexures behind each number.

Download the daily reportPDF, 2.0 MB

Narrated in Hindi. Runs 115 seconds.

The evidence

The daily residual: this year minus last year

■ Red: the de-weathered residual, weather removed. Above the zero line, pollution was higher than last year; below the zero line, it was lower.

Each point is a residual: that day's PM10 level minus the same period last year, after the model removes the effect of weather. The shaded band is the uncertainty around each day. Above the zero line means Delhi's air was genuinely worse than last year, and not merely unluckier with the wind; below it means genuinely cleaner. The run begins 30 May 2026.

The findings

What today's report says

Against yesterday: the one-day move

From 87 to 81. The 95 per cent interval runs -9.2 to -3.3 points, on 42 matched stations.

Against last year: the observed reading

Today 81 against 97 on the same date last year, matched stations. The interval runs -30.9 to -3.2 points.

The weather-corrected verdict

Observed, the year reads -6.5 points, level. Corrected for weather it reads +9.7. 5 of 6 pollutants show no real improvement.

The worst station in the city today

Moderate, on Ozone. Last year this station read 107 on the same date; the change is 35 points.

A caution we publish daily

Gas readings carry documented unit-inconsistency at absolute levels (peer-reviewed international research, 2025); but this CO year-on-year uses the same stations + units as last year, so the DIRECTION of the rise is reliable. Today leads on PM2.5/PM10; gas is context only.