Kolkata vs Korba
Side-by-side air quality comparison between Kolkata and Korba.
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 | Korba |
|---|---|---|
| PM2.5(µg/m³) | 71.70 | 49.20 |
| PM10(µg/m³) | 75.70 | 58.40 |
| NO₂(µg/m³) | 22.30 | 18.50 |
| SO₂(µg/m³) | 12.00 | 13.70 |
| O₃(µg/m³) | 60.00 | 64.00 |
| CO(µg/m³) | 392.00 | 435.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Kolkata averaged an AQI of 101 while Korba averaged 67 — a 34-point (51%) gap, with Kolkata the more polluted and Korba the cleaner of the two. On 356 days when both cities reported, Korba was cleaner on 282 of them; the average daily gap was 65 AQI points.
Seasonality & days
Both cities see their worst air in January on average. Kolkata logged 1% Severe days and 47.800000000000004% Good-or-Satisfactory days; Korba was 0% Severe and 78.8% Good-or-Satisfactory. Longest clean-air streaks: Kolkata 75 days, Korba 83 days.
Year-over-year progress
Kolkata has improved by 76 AQI points (42.9%) from 2017 to 2024; Korba has improved by 19 AQI points (22.1%) over the same window. The worst recorded day for Kolkata reached AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23; Korba hit AQI 313 at Urja Nagar (CECB) on 2023-01-04.
Station-level disparity
Kolkata spans 7 CPCB stations with a 56-point spread (min 95, max 151); Korba spans 2 stations with a 13-point spread (min 62, max 75).
Verdict
🏆 Korba has better air quality with an AQI of 82 compared to Kolkata's 140. That's a significant difference of 58 points.