Kolkata vs Tumkur
Side-by-side air quality comparison between Kolkata and Tumkur.
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 | Tumkur |
|---|---|---|
| PM2.5(µg/m³) | 43.70 | 1.90 |
| PM10(µg/m³) | 51.30 | 2.70 |
| NO₂(µg/m³) | 2.40 | 0.90 |
| SO₂(µg/m³) | 11.70 | 0.80 |
| O₃(µg/m³) | 180.00 | 77.00 |
| CO(µg/m³) | 355.00 | 114.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Kolkata averaged an AQI of 101 while Tumkur averaged 88 — a 13-point (15%) gap, with Kolkata the more polluted and Tumkur the cleaner of the two. On 312 days when both cities reported, Tumkur was cleaner on 189 of them; the average daily gap was 65 AQI points.
Seasonality & days
Kolkata peaks in January, while Tumkur peaks in December. Kolkata logged 1% Severe days and 47.800000000000004% Good-or-Satisfactory days; Tumkur was 0% Severe and 54% Good-or-Satisfactory. Longest clean-air streaks: Kolkata 75 days, Tumkur 20 days.
Year-over-year progress
Kolkata has improved by 76 AQI points (42.9%) from 2017 to 2024; Tumkur has improved by 69 AQI points (43.9%) over the same window. The worst recorded day for Kolkata reached AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23; Tumkur hit AQI 355 at Thimmalapura (KSPCB) on 2023-02-15.
Station-level disparity
Kolkata spans 7 CPCB stations with a 56-point spread (min 95, max 151); Tumkur spans 1 stations with a 0-point spread (min 97, max 97).
Verdict
🏆 Tumkur has better air quality with an AQI of 3 compared to Kolkata's 73. That's a significant difference of 70 points.