Chennai vs Dindigul
Side-by-side air quality comparison between Chennai and Dindigul.
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 | Dindigul |
|---|---|---|
| PM2.5(µg/m³) | 11.70 | 20.10 |
| PM10(µg/m³) | 13.10 | 21.60 |
| NO₂(µg/m³) | 14.20 | 20.20 |
| SO₂(µg/m³) | 10.10 | 3.40 |
| O₃(µg/m³) | 56.00 | 23.00 |
| CO(µg/m³) | 308.00 | 209.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Chennai averaged an AQI of 68 while Dindigul averaged 61 — a 7-point (11%) gap, with Chennai the more polluted and Dindigul the cleaner of the two. On 173 days when both cities reported, Dindigul was cleaner on 145 of them; the average daily gap was 57 AQI points.
Seasonality & days
Chennai peaks in December, while Dindigul peaks in February. Chennai logged 0% Severe days and 57.5% Good-or-Satisfactory days; Dindigul was 0% Severe and 67.3% Good-or-Satisfactory. Longest clean-air streaks: Chennai 53 days, Dindigul 22 days.
Year-over-year progress
Chennai has improved by 25 AQI points (26.9%) from 2017 to 2024; Dindigul has improved by 29 AQI points (32.2%) over the same window. The worst recorded day for Chennai reached AQI 391 at Kodungaiyur (TNPCB) on 2021-05-14; Dindigul hit AQI 352 at Mendonsa Colony (TNPCB) on 2023-03-12.
Station-level disparity
Chennai spans 9 CPCB stations with a 27-point spread (min 63, max 90); Dindigul spans 1 stations with a 0-point spread (min 102, max 102).
Verdict
🏆 Chennai has better air quality with an AQI of 20 compared to Dindigul's 34.