Bilaspur vs Coimbatore
Side-by-side air quality comparison between Bilaspur 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 | Bilaspur | Coimbatore |
|---|---|---|
| PM2.5(µg/m³) | 34.80 | 2.50 |
| PM10(µg/m³) | 43.70 | 3.00 |
| NO₂(µg/m³) | 28.50 | 4.60 |
| SO₂(µg/m³) | 18.50 | 2.00 |
| O₃(µg/m³) | 38.00 | 40.00 |
| CO(µg/m³) | 477.00 | 163.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Bilaspur averaged an AQI of 61 while Coimbatore averaged 66 — a 5-point (8%) gap, with Coimbatore the more polluted and Bilaspur the cleaner of the two. On 566 days when both cities reported, Coimbatore was cleaner on 287 of them; the average daily gap was 25 AQI points.
Seasonality & days
Bilaspur peaks in December, while Coimbatore peaks in November. Bilaspur logged 0% Severe days and 88% Good-or-Satisfactory days; Coimbatore was 0% Severe and 90.5% Good-or-Satisfactory. Longest clean-air streaks: Bilaspur 66 days, Coimbatore 32 days.
Year-over-year progress
Bilaspur has improved by 22 AQI points (26.5%) from 2021 to 2024; Coimbatore has improved by 5 AQI points (7%) over the same window. The worst recorded day for Bilaspur reached AQI 259 at Mangala (NTPC) on 2023-03-09; Coimbatore hit AQI 279 at SIDCO Kurichi (TNPCB) on 2024-09-28.
Station-level disparity
Bilaspur spans 1 CPCB stations with a 0-point spread (min 69, max 69); Coimbatore spans 2 stations with a 1-point spread (min 63, max 64).
Verdict
🏆 Coimbatore has better air quality with an AQI of 4 compared to Bilaspur's 59. That's a significant difference of 55 points.