Kolkata vs Satna
Side-by-side air quality comparison between Kolkata and Satna.
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 | Satna |
|---|---|---|
| PM2.5(µg/m³) | 64.70 | 31.00 |
| PM10(µg/m³) | 69.40 | 47.80 |
| NO₂(µg/m³) | 18.10 | 18.60 |
| SO₂(µg/m³) | 13.10 | 7.00 |
| O₃(µg/m³) | 86.00 | 55.00 |
| CO(µg/m³) | 428.00 | 240.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Kolkata averaged an AQI of 101 while Satna averaged 66 — a 35-point (53%) gap, with Kolkata the more polluted and Satna the cleaner of the two. On 1931 days when both cities reported, Satna was cleaner on 1451 of them; the average daily gap was 88 AQI points.
Seasonality & days
Kolkata peaks in January, while Satna peaks in November. Kolkata logged 1% Severe days and 47.800000000000004% Good-or-Satisfactory days; Satna was 0.2% Severe and 74.1% Good-or-Satisfactory. Longest clean-air streaks: Kolkata 75 days, Satna 146 days.
Year-over-year progress
Kolkata has improved by 76 AQI points (42.9%) from 2017 to 2024; Satna has improved by 58 AQI points (46.8%) over the same window. The worst recorded day for Kolkata reached AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23; Satna hit AQI 500 at Bandhavgar Colony Satna (Cement) on 2018-05-27.
Station-level disparity
Kolkata spans 7 CPCB stations with a 56-point spread (min 95, max 151); Satna spans 1 stations with a 0-point spread (min 85, max 85).
Verdict
🏆 Satna has better air quality with an AQI of 53 compared to Kolkata's 117. That's a significant difference of 64 points.