Gadag vs Kolkata
Side-by-side air quality comparison between Gadag 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 | Gadag | Kolkata |
|---|---|---|
| PM2.5(µg/m³) | 6.00 | 71.70 |
| PM10(µg/m³) | 10.80 | 75.70 |
| NO₂(µg/m³) | 5.70 | 22.30 |
| SO₂(µg/m³) | 1.30 | 12.00 |
| O₃(µg/m³) | 40.00 | 60.00 |
| CO(µg/m³) | 113.00 | 392.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Gadag averaged an AQI of 53 while Kolkata averaged 101 — a 48-point (91%) gap, with Kolkata the more polluted and Gadag the cleaner of the two. On 778 days when both cities reported, Gadag was cleaner on 737 of them; the average daily gap was 94 AQI points.
Seasonality & days
Gadag peaks in March, while Kolkata peaks in January. Gadag logged 0.3% Severe days and 96.1% Good-or-Satisfactory days; Kolkata was 1% Severe and 47.800000000000004% Good-or-Satisfactory. Longest clean-air streaks: Gadag 50 days, Kolkata 75 days.
Year-over-year progress
Gadag has worsened by 10 AQI points (23.3%) from 2021 to 2024; Kolkata has improved by 76 AQI points (42.9%) over the same window. The worst recorded day for Gadag reached AQI 500 at Panchal Nagar (KSPCB) on 2022-12-10; Kolkata hit AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23.
Station-level disparity
Gadag spans 1 CPCB stations with a 0-point spread (min 54, max 54); Kolkata spans 7 stations with a 56-point spread (min 95, max 151).
Verdict
🏆 Gadag has better air quality with an AQI of 11 compared to Kolkata's 140. That's a significant difference of 129 points.