Ambala vs Chennai
Side-by-side air quality comparison between Ambala 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
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Ambala averaged an AQI of 94 while Chennai averaged 68 — a 26-point (38%) gap, with Ambala the more polluted and Chennai the cleaner of the two. On 1682 days when both cities reported, Chennai was cleaner on 941 of them; the average daily gap was 63 AQI points.
Seasonality & days
Ambala peaks in November, while Chennai peaks in December. Ambala logged 0.2% Severe days and 46.5% Good-or-Satisfactory days; Chennai was 0% Severe and 57.5% Good-or-Satisfactory. Longest clean-air streaks: Ambala 44 days, Chennai 53 days.
Year-over-year progress
Ambala has improved by 52 AQI points (35.6%) from 2019 to 2024; Chennai has improved by 25 AQI points (26.9%) over the same window. The worst recorded day for Ambala reached AQI 452 at Patti Mehar (HSPCB) on 2020-11-04; Chennai hit AQI 391 at Kodungaiyur (TNPCB) on 2021-05-14.
Station-level disparity
Ambala spans 1 CPCB stations with a 0-point spread (min 126, max 126); Chennai spans 9 stations with a 27-point spread (min 63, max 90).