Asansol vs Coimbatore
Side-by-side air quality comparison between Asansol 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 | Asansol | Coimbatore |
|---|---|---|
| PM2.5(µg/m³) | 91.00 | 2.70 |
| PM10(µg/m³) | 96.20 | 2.90 |
| NO₂(µg/m³) | 48.00 | 4.50 |
| SO₂(µg/m³) | 91.90 | 2.20 |
| O₃(µg/m³) | 58.00 | 43.00 |
| CO(µg/m³) | 838.00 | 159.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Asansol averaged an AQI of 145 while Coimbatore averaged 66 — a 79-point (120%) gap, with Asansol the more polluted and Coimbatore the cleaner of the two. On 941 days when both cities reported, Coimbatore was cleaner on 786 of them; the average daily gap was 86 AQI points.
Seasonality & days
Asansol peaks in December, while Coimbatore peaks in November. Asansol logged 0% Severe days and 43.3% Good-or-Satisfactory days; Coimbatore was 0% Severe and 90.5% Good-or-Satisfactory. Longest clean-air streaks: Asansol 44 days, Coimbatore 32 days.
Year-over-year progress
Asansol has worsened by 12 AQI points (9%) from 2018 to 2024; Coimbatore has improved by 5 AQI points (7%) over the same window. The worst recorded day for Asansol reached AQI 394 at Court Area (WBPCB) on 2022-12-13; Coimbatore hit AQI 279 at SIDCO Kurichi (TNPCB) on 2024-09-28.
Station-level disparity
Asansol spans 4 CPCB stations with a 40-point spread (min 123, max 163); 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 Asansol's 204. That's a significant difference of 199 points.