Bihar Sharif vs Coimbatore
Side-by-side air quality comparison between Bihar Sharif 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 | Bihar Sharif | Coimbatore |
|---|---|---|
| PM2.5(µg/m³) | 71.90 | 2.70 |
| PM10(µg/m³) | 79.40 | 2.90 |
| NO₂(µg/m³) | 27.20 | 4.50 |
| SO₂(µg/m³) | 14.60 | 2.20 |
| O₃(µg/m³) | 64.00 | 43.00 |
| CO(µg/m³) | 543.00 | 159.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Bihar Sharif averaged an AQI of 115 while Coimbatore averaged 66 — a 49-point (74%) gap, with Bihar Sharif the more polluted and Coimbatore the cleaner of the two. On 463 days when both cities reported, Coimbatore was cleaner on 416 of them; the average daily gap was 101 AQI points.
Seasonality & days
Bihar Sharif peaks in December, while Coimbatore peaks in November. Bihar Sharif logged 1% Severe days and 39.1% Good-or-Satisfactory days; Coimbatore was 0% Severe and 90.5% Good-or-Satisfactory. Longest clean-air streaks: Bihar Sharif 32 days, Coimbatore 32 days.
Year-over-year progress
Bihar Sharif has improved by 138 AQI points (54.5%) from 2021 to 2024; Coimbatore has improved by 5 AQI points (7%) over the same window. The worst recorded day for Bihar Sharif reached AQI 433 at D M Colony Bihar (BSPCB) on 2021-12-24; Coimbatore hit AQI 279 at SIDCO Kurichi (TNPCB) on 2024-09-28.
Station-level disparity
Bihar Sharif spans 1 CPCB stations with a 0-point spread (min 146, max 146); 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 Bihar Sharif's 140. That's a significant difference of 135 points.