Coimbatore vs Kolār
Side-by-side air quality comparison between Coimbatore and Kolār.
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 | Coimbatore | Kolār |
|---|---|---|
| PM2.5(µg/m³) | 2.50 | 5.90 |
| PM10(µg/m³) | 3.00 | 7.20 |
| NO₂(µg/m³) | 4.60 | 10.90 |
| SO₂(µg/m³) | 2.00 | 4.70 |
| O₃(µg/m³) | 40.00 | 35.00 |
| CO(µg/m³) | 163.00 | 189.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Coimbatore averaged an AQI of 66 while Kolār averaged 65 — a 1-point (2%) gap, with Coimbatore the more polluted and Kolār the cleaner of the two. On 512 days when both cities reported, Kolār was cleaner on 315 of them; the average daily gap was 27 AQI points.
Seasonality & days
Coimbatore peaks in November, while Kolār peaks in September. Coimbatore logged 0% Severe days and 90.5% Good-or-Satisfactory days; Kolār was 0.9% Severe and 85.30000000000001% Good-or-Satisfactory. Longest clean-air streaks: Coimbatore 32 days, Kolār 17 days.
Year-over-year progress
Coimbatore has improved by 5 AQI points (7%) from 2019 to 2024; Kolār has improved by 56 AQI points (46.3%) over the same window. The worst recorded day for Coimbatore reached AQI 279 at SIDCO Kurichi (TNPCB) on 2024-09-28; Kolār hit AQI 500 at Tamaka Ind Area (KSPCB) on 2018-09-18.
Station-level disparity
Coimbatore spans 2 CPCB stations with a 1-point spread (min 63, max 64); Kolār spans 1 stations with a 0-point spread (min 71, max 71).
Verdict
🏆 Coimbatore has better air quality with an AQI of 4 compared to Kolār's 10.