Kolkata vs Madurai
Side-by-side air quality comparison between Kolkata and Madurai.
Live AQI from Open-Meteo CAMS (~45 km global model, updated hourly). Multi-year history from CPCB station data via aqinow.co pipeline (2016–2024, station-level daily records).
AQI Comparison
Pollutant-level comparison (PM2.5, PM10, O3, NO2, SO2, CO)▾
| Pollutant | Kolkata | Madurai |
|---|---|---|
| PM2.5(µg/m³) | 71.70 | 13.70 |
| PM10(µg/m³) | 75.70 | 15.40 |
| NO₂(µg/m³) | 22.30 | 23.90 |
| SO₂(µg/m³) | 12.00 | 4.60 |
| O₃(µg/m³) | 60.00 | 10.00 |
| CO(µg/m³) | 392.00 | 188.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Kolkata averaged an AQI of 101 while Madurai averaged 48 — a 53-point (110%) gap, with Kolkata the more polluted and Madurai the cleaner of the two. On 76 days when both cities reported, Madurai was cleaner on 76 of them; the average daily gap was 130 AQI points.
Seasonality & days
Kolkata peaks in January, while Madurai peaks in December. Kolkata logged 1% Severe days and 47.800000000000004% Good-or-Satisfactory days; Madurai was 0% Severe and 98.7% Good-or-Satisfactory. Longest clean-air streaks: Kolkata 75 days, Madurai 17 days.
Year-over-year progress
The worst recorded day for Kolkata reached AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23; Madurai hit AQI 105 at Uchapatti (TNPCB) on 2024-11-26.
Station-level disparity
Kolkata spans 7 CPCB stations with a 56-point spread (min 95, max 151); Madurai spans 1 stations with a 0-point spread (min 48, max 48).
Verdict
🏆 Madurai has better air quality with an AQI of 23 compared to Kolkata's 140. That's a significant difference of 117 points.