Begusarai vs Chennai
Side-by-side air quality comparison between Begusarai 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 | Begusarai | Chennai |
|---|---|---|
| PM2.5(µg/m³) | 93.40 | 11.70 |
| PM10(µg/m³) | 103.60 | 13.10 |
| NO₂(µg/m³) | 41.50 | 14.20 |
| SO₂(µg/m³) | 17.90 | 10.10 |
| O₃(µg/m³) | 64.00 | 56.00 |
| CO(µg/m³) | 637.00 | 308.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Begusarai averaged an AQI of 128 while Chennai averaged 68 — a 60-point (88%) gap, with Begusarai the more polluted and Chennai the cleaner of the two. On 130 days when both cities reported, Chennai was cleaner on 79 of them; the average daily gap was 67 AQI points.
Seasonality & days
Begusarai peaks in January, while Chennai peaks in December. Begusarai logged 8.7% Severe days and 20.8% Good-or-Satisfactory days; Chennai was 0% Severe and 57.5% Good-or-Satisfactory. Longest clean-air streaks: Begusarai 14 days, Chennai 53 days.
Year-over-year progress
Begusarai has improved by 137 AQI points (51.7%) from 2023 to 2024; Chennai has improved by 25 AQI points (26.9%) over the same window. The worst recorded day for Begusarai reached AQI 469 at Lohiyanagar (BSPCB) on 2023-01-14; Chennai hit AQI 391 at Kodungaiyur (TNPCB) on 2021-05-14.
Station-level disparity
Begusarai spans 1 CPCB stations with a 0-point spread (min 213, max 213); Chennai spans 9 stations with a 27-point spread (min 63, max 90).
Verdict
🏆 Chennai has better air quality with an AQI of 20 compared to Begusarai's 212. That's a significant difference of 192 points.