Chennai vs Patiala
Side-by-side air quality comparison between Chennai and Patiala.
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 | Patiala |
|---|---|---|
| PM2.5(µg/m³) | 11.70 | 79.40 |
| PM10(µg/m³) | 13.10 | 380.90 |
| NO₂(µg/m³) | 14.20 | 13.60 |
| SO₂(µg/m³) | 10.10 | 13.50 |
| O₃(µg/m³) | 56.00 | 90.00 |
| CO(µg/m³) | 308.00 | 640.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Chennai averaged an AQI of 68 while Patiala averaged 103 — a 35-point (51%) gap, with Patiala the more polluted and Chennai the cleaner of the two. On 2092 days when both cities reported, Patiala was cleaner on 1142 of them; the average daily gap was 52 AQI points.
Seasonality & days
Chennai peaks in December, while Patiala peaks in November. Chennai logged 0% Severe days and 57.5% Good-or-Satisfactory days; Patiala was 0.1% Severe and 54.8% Good-or-Satisfactory. Longest clean-air streaks: Chennai 53 days, Patiala 86 days.
Year-over-year progress
Chennai has improved by 25 AQI points (26.9%) from 2017 to 2024; Patiala has worsened by 8 AQI points (8.4%) over the same window. The worst recorded day for Chennai reached AQI 391 at Kodungaiyur (TNPCB) on 2021-05-14; Patiala hit AQI 415 at Model Town (PPCB) on 2019-11-03.
Station-level disparity
Chennai spans 9 CPCB stations with a 27-point spread (min 63, max 90); Patiala spans 1 stations with a 0-point spread (min 104, max 104).
Verdict
🏆 Chennai has better air quality with an AQI of 20 compared to Patiala's 339. That's a significant difference of 319 points.