Coimbatore vs Karur
Side-by-side air quality comparison between Coimbatore and Karur.
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 | Karur |
|---|---|---|
| PM2.5(µg/m³) | 2.50 | 3.80 |
| PM10(µg/m³) | 3.00 | 4.40 |
| NO₂(µg/m³) | 4.60 | 7.30 |
| SO₂(µg/m³) | 2.00 | 2.70 |
| O₃(µg/m³) | 40.00 | 37.00 |
| CO(µg/m³) | 163.00 | 117.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Coimbatore averaged an AQI of 66 while Karur averaged 71 — a 5-point (8%) gap, with Karur the more polluted and Coimbatore the cleaner of the two. On 71 days when both cities reported, Karur was cleaner on 54 of them; the average daily gap was 23 AQI points.
Seasonality & days
Coimbatore peaks in November, while Karur peaks in December. Coimbatore logged 0% Severe days and 90.5% Good-or-Satisfactory days; Karur was 0% Severe and 80.3% Good-or-Satisfactory. Longest clean-air streaks: Coimbatore 32 days, Karur 34 days.
Year-over-year progress
The worst recorded day for Coimbatore reached AQI 279 at SIDCO Kurichi (TNPCB) on 2024-09-28; Karur hit AQI 149 at Kamadenu Nagar (TNPCB) on 2024-11-26.
Station-level disparity
Coimbatore spans 2 CPCB stations with a 1-point spread (min 63, max 64); Karur 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 Karur's 6.