Chennai vs Udaipur
Side-by-side air quality comparison between Chennai and Udaipur.
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 | Udaipur |
|---|---|---|
| PM2.5(µg/m³) | 11.70 | 23.60 |
| PM10(µg/m³) | 13.10 | 33.90 |
| NO₂(µg/m³) | 14.20 | 7.70 |
| SO₂(µg/m³) | 10.10 | 8.30 |
| O₃(µg/m³) | 56.00 | 51.00 |
| CO(µg/m³) | 308.00 | 184.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Chennai averaged an AQI of 68 while Udaipur averaged 112 — a 44-point (65%) gap, with Udaipur the more polluted and Chennai the cleaner of the two. On 2144 days when both cities reported, Chennai was cleaner on 1094 of them; the average daily gap was 47 AQI points.
Seasonality & days
Chennai peaks in December, while Udaipur peaks in January. Chennai logged 0% Severe days and 57.5% Good-or-Satisfactory days; Udaipur was 0% Severe and 47% Good-or-Satisfactory. Longest clean-air streaks: Chennai 53 days, Udaipur 49 days.
Year-over-year progress
Chennai has improved by 25 AQI points (26.9%) from 2017 to 2024; Udaipur has improved by 77 AQI points (40.7%) over the same window. The worst recorded day for Chennai reached AQI 391 at Kodungaiyur (TNPCB) on 2021-05-14; Udaipur hit AQI 348 at Ashok Nagar (RSPCB) on 2021-11-15.
Station-level disparity
Chennai spans 9 CPCB stations with a 27-point spread (min 63, max 90); Udaipur spans 1 stations with a 0-point spread (min 112, max 112).
Verdict
🏆 Chennai has better air quality with an AQI of 20 compared to Udaipur's 39.