Kolkata vs Kota
Side-by-side air quality comparison between Kolkata and Kota.
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 | Kota |
|---|---|---|
| PM2.5(µg/m³) | 64.70 | 23.30 |
| PM10(µg/m³) | 69.40 | 36.10 |
| NO₂(µg/m³) | 18.10 | 6.10 |
| SO₂(µg/m³) | 13.10 | 7.50 |
| O₃(µg/m³) | 86.00 | 62.00 |
| CO(µg/m³) | 428.00 | 191.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Kolkata averaged an AQI of 101 while Kota averaged 131 — a 30-point (30%) gap, with Kota the more polluted and Kolkata the cleaner of the two. On 2031 days when both cities reported, Kota was cleaner on 1144 of them; the average daily gap was 71 AQI points.
Seasonality & days
Kolkata peaks in January, while Kota peaks in November. Kolkata logged 1% Severe days and 47.800000000000004% Good-or-Satisfactory days; Kota was 0% Severe and 40.599999999999994% Good-or-Satisfactory. Longest clean-air streaks: Kolkata 75 days, Kota 89 days.
Year-over-year progress
Kolkata has improved by 76 AQI points (42.9%) from 2017 to 2024; Kota has improved by 45 AQI points (25.6%) over the same window. The worst recorded day for Kolkata reached AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23; Kota hit AQI 375 at Shrinath Puram (RSPCB) on 2021-11-14.
Station-level disparity
Kolkata spans 7 CPCB stations with a 56-point spread (min 95, max 151); Kota spans 3 stations with a 9-point spread (min 121, max 130).
Verdict
🏆 Kota has better air quality with an AQI of 39 compared to Kolkata's 117. That's a significant difference of 78 points.