Kolkata vs Rājsamand
Side-by-side air quality comparison between Kolkata and Rājsamand.
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 | Rājsamand |
|---|---|---|
| PM2.5(µg/m³) | 68.70 | 17.50 |
| PM10(µg/m³) | 72.60 | 31.10 |
| NO₂(µg/m³) | 22.20 | 5.40 |
| SO₂(µg/m³) | 11.50 | 4.00 |
| O₃(µg/m³) | 55.00 | 63.00 |
| CO(µg/m³) | 364.00 | 133.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Kolkata averaged an AQI of 101 while Rājsamand averaged 88 — a 13-point (15%) gap, with Kolkata the more polluted and Rājsamand the cleaner of the two. On 332 days when both cities reported, Rājsamand was cleaner on 240 of them; the average daily gap was 55 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; Rājsamand was 0% Severe and 69.7% Good-or-Satisfactory. Longest clean-air streaks: Kolkata 75 days, Rājsamand 42 days.
Year-over-year progress
Kolkata has improved by 76 AQI points (42.9%) from 2017 to 2024; Rājsamand has improved by 13 AQI points (12.9%) over the same window. The worst recorded day for Kolkata reached AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23; Rājsamand hit AQI 320 at Dhoinda (RSPCB) on 2024-08-28.
Station-level disparity
Kolkata spans 7 CPCB stations with a 56-point spread (min 95, max 151); Rājsamand spans 1 stations with a 0-point spread (min 94, max 94).
Verdict
🏆 Rājsamand has better air quality with an AQI of 31 compared to Kolkata's 130. That's a significant difference of 99 points.