Katni vs Kolkata
Side-by-side air quality comparison between Katni 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 | Katni | Kolkata |
|---|---|---|
| PM2.5(µg/m³) | 27.90 | 43.70 |
| PM10(µg/m³) | 76.10 | 51.30 |
| NO₂(µg/m³) | 0.50 | 2.40 |
| SO₂(µg/m³) | 4.30 | 11.70 |
| O₃(µg/m³) | 129.00 | 180.00 |
| CO(µg/m³) | 181.00 | 355.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Katni averaged an AQI of 105 while Kolkata averaged 101 — a 4-point (4%) gap, with Katni the more polluted and Kolkata the cleaner of the two. On 1523 days when both cities reported, Katni was cleaner on 840 of them; the average daily gap was 57 AQI points.
Seasonality & days
Katni peaks in November, while Kolkata peaks in January. Katni logged 0% Severe days and 39.3% Good-or-Satisfactory days; Kolkata was 1% Severe and 47.800000000000004% Good-or-Satisfactory. Longest clean-air streaks: Katni 62 days, Kolkata 75 days.
Year-over-year progress
Katni has improved by 93 AQI points (47%) from 2019 to 2024; Kolkata has improved by 76 AQI points (42.9%) over the same window. The worst recorded day for Katni reached AQI 350 at Gole Bazar (MPPCB) on 2019-11-01; Kolkata hit AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23.
Station-level disparity
Katni spans 1 CPCB stations with a 0-point spread (min 137, max 137); Kolkata spans 7 stations with a 56-point spread (min 95, max 151).
Verdict
🏆 Kolkata has better air quality with an AQI of 73 compared to Katni's 77.