Bangalore vs Coimbatore
Side-by-side air quality comparison between Bangalore and Coimbatore.
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 | Bangalore | Coimbatore |
|---|---|---|
| PM2.5(µg/m³) | 5.10 | 2.70 |
| PM10(µg/m³) | 5.60 | 2.90 |
| NO₂(µg/m³) | 9.50 | 4.50 |
| SO₂(µg/m³) | 4.20 | 2.20 |
| O₃(µg/m³) | 35.00 | 43.00 |
| CO(µg/m³) | 290.00 | 159.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Bangalore averaged an AQI of 74 while Coimbatore averaged 66 — a 8-point (12%) gap, with Bangalore the more polluted and Coimbatore the cleaner of the two. On 1005 days when both cities reported, Coimbatore was cleaner on 912 of them; the average daily gap was 55 AQI points.
Seasonality & days
Bangalore peaks in March, while Coimbatore peaks in November. Bangalore logged 0.5% Severe days and 42.6% Good-or-Satisfactory days; Coimbatore was 0% Severe and 90.5% Good-or-Satisfactory. Longest clean-air streaks: Bangalore 31 days, Coimbatore 32 days.
Year-over-year progress
Bangalore has improved by 26 AQI points (26%) from 2016 to 2024; Coimbatore has improved by 5 AQI points (7%) over the same window. The worst recorded day for Bangalore reached AQI 500 at Silk Board (KSPCB) on 2024-01-10; Coimbatore hit AQI 279 at SIDCO Kurichi (TNPCB) on 2024-09-28.
Station-level disparity
Bangalore spans 14 CPCB stations with a 50-point spread (min 49, max 99); Coimbatore spans 2 stations with a 1-point spread (min 63, max 64).
Verdict
🏆 Coimbatore has better air quality with an AQI of 5 compared to Bangalore's 9.