Kolkata vs Raipur
Side-by-side air quality comparison between Kolkata and Raipur.
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 | Raipur |
|---|---|---|
| PM2.5(µg/m³) | 64.70 | 46.40 |
| PM10(µg/m³) | 69.40 | 52.30 |
| NO₂(µg/m³) | 18.10 | 43.70 |
| SO₂(µg/m³) | 13.10 | 70.60 |
| O₃(µg/m³) | 86.00 | 42.00 |
| CO(µg/m³) | 428.00 | 484.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Kolkata averaged an AQI of 101 while Raipur averaged 74 — a 27-point (36%) gap, with Kolkata the more polluted and Raipur the cleaner of the two. On 372 days when both cities reported, Raipur was cleaner on 214 of them; the average daily gap was 58 AQI points.
Seasonality & days
Kolkata peaks in January, while Raipur peaks in November. Kolkata logged 1% Severe days and 47.800000000000004% Good-or-Satisfactory days; Raipur was 0% Severe and 54.3% Good-or-Satisfactory. Longest clean-air streaks: Kolkata 75 days, Raipur 70 days.
Year-over-year progress
Kolkata has improved by 76 AQI points (42.9%) from 2017 to 2024; Raipur has improved by 64 AQI points (46.4%) over the same window. The worst recorded day for Kolkata reached AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23; Raipur hit AQI 226 at AIIMS (CECB) on 2023-12-26.
Station-level disparity
Kolkata spans 7 CPCB stations with a 56-point spread (min 95, max 151); Raipur spans 4 stations with a 42-point spread (min 63, max 105).
Verdict
🏆 Raipur has better air quality with an AQI of 78 compared to Kolkata's 117.