Chapra vs Coimbatore
Side-by-side air quality comparison between Chapra 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 | Chapra | Coimbatore |
|---|---|---|
| PM2.5(µg/m³) | 99.00 | 2.50 |
| PM10(µg/m³) | 115.50 | 3.00 |
| NO₂(µg/m³) | 53.70 | 4.60 |
| SO₂(µg/m³) | 13.70 | 2.00 |
| O₃(µg/m³) | 10.00 | 40.00 |
| CO(µg/m³) | 858.00 | 163.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Chapra averaged an AQI of 149 while Coimbatore averaged 66 — a 83-point (126%) gap, with Chapra the more polluted and Coimbatore the cleaner of the two. On 500 days when both cities reported, Coimbatore was cleaner on 467 of them; the average daily gap was 126 AQI points.
Seasonality & days
Chapra peaks in January, while Coimbatore peaks in November. Chapra logged 2.4% Severe days and 26.8% Good-or-Satisfactory days; Coimbatore was 0% Severe and 90.5% Good-or-Satisfactory. Longest clean-air streaks: Chapra 14 days, Coimbatore 32 days.
Year-over-year progress
Chapra has improved by 181 AQI points (54.8%) from 2021 to 2024; Coimbatore has improved by 5 AQI points (7%) over the same window. The worst recorded day for Chapra reached AQI 452 at Darshan Nagar (BSPCB) on 2022-12-20; Coimbatore hit AQI 279 at SIDCO Kurichi (TNPCB) on 2024-09-28.
Station-level disparity
Chapra spans 1 CPCB stations with a 0-point spread (min 195, max 195); 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 Chapra's 231. That's a significant difference of 227 points.