Chennai vs Sonipat
Side-by-side air quality comparison between Chennai and Sonipat.
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 | Sonipat |
|---|---|---|
| PM2.5(µg/m³) | 13.90 | 78.20 |
| PM10(µg/m³) | 15.30 | 154.10 |
| NO₂(µg/m³) | 15.00 | 47.90 |
| SO₂(µg/m³) | 9.10 | 33.40 |
| O₃(µg/m³) | 56.00 | 43.00 |
| CO(µg/m³) | 316.00 | 704.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Chennai averaged an AQI of 68 while Sonipat averaged 134 — a 66-point (97%) gap, with Sonipat the more polluted and Chennai the cleaner of the two. On 1531 days when both cities reported, Chennai was cleaner on 1048 of them; the average daily gap was 75 AQI points.
Seasonality & days
Chennai peaks in December, while Sonipat peaks in November. Chennai logged 0% Severe days and 57.5% Good-or-Satisfactory days; Sonipat was 0.8% Severe and 26.5% Good-or-Satisfactory. Longest clean-air streaks: Chennai 53 days, Sonipat 21 days.
Year-over-year progress
Chennai has improved by 25 AQI points (26.9%) from 2017 to 2024; Sonipat has improved by 220 AQI points (62.1%) over the same window. The worst recorded day for Chennai reached AQI 391 at Kodungaiyur (TNPCB) on 2021-05-14; Sonipat hit AQI 455 at Murthal (HSPCB) on 2023-11-03.
Station-level disparity
Chennai spans 9 CPCB stations with a 27-point spread (min 63, max 90); Sonipat spans 1 stations with a 0-point spread (min 162, max 162).
Verdict
🏆 Chennai has better air quality with an AQI of 23 compared to Sonipat's 161. That's a significant difference of 138 points.