Chennai vs Muzaffarpur
Side-by-side air quality comparison between Chennai and Muzaffarpur.
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 | Chennai | Muzaffarpur |
|---|---|---|
| PM2.5(µg/m³) | 11.70 | 124.30 |
| PM10(µg/m³) | 13.10 | 140.60 |
| NO₂(µg/m³) | 14.20 | 60.50 |
| SO₂(µg/m³) | 10.10 | 18.60 |
| O₃(µg/m³) | 56.00 | 11.00 |
| CO(µg/m³) | 308.00 | 978.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Chennai averaged an AQI of 68 while Muzaffarpur averaged 151 — a 83-point (122%) gap, with Muzaffarpur the more polluted and Chennai the cleaner of the two. On 2079 days when both cities reported, Chennai was cleaner on 1495 of them; the average daily gap was 116 AQI points.
Seasonality & days
Chennai peaks in December, while Muzaffarpur peaks in January. Chennai logged 0% Severe days and 57.5% Good-or-Satisfactory days; Muzaffarpur was 4.5% Severe and 30.900000000000002% Good-or-Satisfactory. Longest clean-air streaks: Chennai 53 days, Muzaffarpur 26 days.
Year-over-year progress
Chennai has improved by 25 AQI points (26.9%) from 2017 to 2024; Muzaffarpur has improved by 62 AQI points (29.1%) over the same window. The worst recorded day for Chennai reached AQI 391 at Kodungaiyur (TNPCB) on 2021-05-14; Muzaffarpur hit AQI 482 at Collectorate (BSPCB) on 2016-01-01.
Station-level disparity
Chennai spans 9 CPCB stations with a 27-point spread (min 63, max 90); Muzaffarpur spans 3 stations with a 14-point spread (min 171, max 185).
Verdict
🏆 Chennai has better air quality with an AQI of 20 compared to Muzaffarpur's 304. That's a significant difference of 284 points.