Aizawl vs Chennai
Side-by-side air quality comparison between Aizawl 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 | Aizawl | Chennai |
|---|---|---|
| PM2.5(µg/m³) | 30.30 | 16.60 |
| PM10(µg/m³) | 39.70 | 18.20 |
| NO₂(µg/m³) | 8.00 | 16.20 |
| SO₂(µg/m³) | 3.30 | 9.00 |
| O₃(µg/m³) | 48.00 | 57.00 |
| CO(µg/m³) | 254.00 | 350.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Aizawl averaged an AQI of 46 while Chennai averaged 68 — a 22-point (48%) gap, with Chennai the more polluted and Aizawl the cleaner of the two. On 1211 days when both cities reported, Aizawl was cleaner on 1094 of them; the average daily gap was 64 AQI points.
Seasonality & days
Aizawl peaks in March, while Chennai peaks in December. Aizawl logged 0% Severe days and 94.2% Good-or-Satisfactory days; Chennai was 0% Severe and 57.5% Good-or-Satisfactory. Longest clean-air streaks: Aizawl 76 days, Chennai 53 days.
Year-over-year progress
Aizawl has worsened by 16 AQI points (53.3%) from 2020 to 2024; Chennai has improved by 25 AQI points (26.9%) over the same window. The worst recorded day for Aizawl reached AQI 208 at Sikulpuikawn Aizawl (PCB) on 2021-01-20; Chennai hit AQI 391 at Kodungaiyur (TNPCB) on 2021-05-14.
Station-level disparity
Aizawl spans 1 CPCB stations with a 0-point spread (min 43, max 43); Chennai spans 9 stations with a 27-point spread (min 63, max 90).
Verdict
🏆 Chennai has better air quality with an AQI of 28 compared to Aizawl's 51.