Kanchipuram vs Kolkata
Side-by-side air quality comparison between Kanchipuram and Kolkata.
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 | Kanchipuram | Kolkata |
|---|---|---|
| PM2.5(µg/m³) | 9.70 | 71.70 |
| PM10(µg/m³) | 11.70 | 75.70 |
| NO₂(µg/m³) | 12.20 | 22.30 |
| SO₂(µg/m³) | 4.60 | 12.00 |
| O₃(µg/m³) | 41.00 | 60.00 |
| CO(µg/m³) | 265.00 | 392.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Kanchipuram averaged an AQI of 51 while Kolkata averaged 101 — a 50-point (98%) gap, with Kolkata the more polluted and Kanchipuram the cleaner of the two. On 141 days when both cities reported, Kanchipuram was cleaner on 135 of them; the average daily gap was 128 AQI points.
Seasonality & days
Kanchipuram peaks in February, while Kolkata peaks in January. Kanchipuram logged 0% Severe days and 94% Good-or-Satisfactory days; Kolkata was 1% Severe and 47.800000000000004% Good-or-Satisfactory. Longest clean-air streaks: Kanchipuram 18 days, Kolkata 75 days.
Year-over-year progress
Kanchipuram has improved by 18 AQI points (26.1%) from 2022 to 2024; Kolkata has improved by 76 AQI points (42.9%) over the same window. The worst recorded day for Kanchipuram reached AQI 320 at Kilambi (TNPCB) on 2023-05-22; Kolkata hit AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23.
Station-level disparity
Kanchipuram spans 1 CPCB stations with a 0-point spread (min 57, max 57); Kolkata spans 7 stations with a 56-point spread (min 95, max 151).
Verdict
🏆 Kanchipuram has better air quality with an AQI of 16 compared to Kolkata's 140. That's a significant difference of 124 points.