Bihar Sharif vs Chennai
Side-by-side air quality comparison between Bihar Sharif and Chennai.
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 | Chennai |
|---|---|---|
| PM2.5(µg/m³) | 74.50 | 13.90 |
| PM10(µg/m³) | 82.20 | 15.30 |
| NO₂(µg/m³) | 35.60 | 15.00 |
| SO₂(µg/m³) | 13.00 | 9.10 |
| O₃(µg/m³) | 31.00 | 56.00 |
| CO(µg/m³) | 620.00 | 316.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Bihar Sharif averaged an AQI of 115 while Chennai averaged 68 — a 47-point (69%) gap, with Bihar Sharif the more polluted and Chennai the cleaner of the two. On 594 days when both cities reported, Chennai was cleaner on 373 of them; the average daily gap was 88 AQI points.
Seasonality & days
Both cities see their worst air in December on average. Bihar Sharif logged 1% Severe days and 39.1% Good-or-Satisfactory days; Chennai was 0% Severe and 57.5% Good-or-Satisfactory. Longest clean-air streaks: Bihar Sharif 32 days, Chennai 53 days.
Year-over-year progress
Bihar Sharif has improved by 138 AQI points (54.5%) from 2021 to 2024; Chennai has improved by 25 AQI points (26.9%) over the same window. The worst recorded day for Bihar Sharif reached AQI 433 at D M Colony Bihar (BSPCB) on 2021-12-24; Chennai hit AQI 391 at Kodungaiyur (TNPCB) on 2021-05-14.
Station-level disparity
Bihar Sharif spans 1 CPCB stations with a 0-point spread (min 146, max 146); Chennai spans 9 stations with a 27-point spread (min 63, max 90).
Verdict
🏆 Chennai has better air quality with an AQI of 23 compared to Bihar Sharif's 149. That's a significant difference of 126 points.