Chennai vs Gummidipoondi
Side-by-side air quality comparison between Chennai and Gummidipoondi.
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, Chennai averaged an AQI of 68 while Gummidipoondi averaged 107 — a 39-point (57%) gap, with Gummidipoondi the more polluted and Chennai the cleaner of the two. On 744 days when both cities reported, Gummidipoondi was cleaner on 419 of them; the average daily gap was 42 AQI points.
Seasonality & days
Chennai peaks in December, while Gummidipoondi peaks in November. Chennai logged 0% Severe days and 57.5% Good-or-Satisfactory days; Gummidipoondi was 0% Severe and 59.1% Good-or-Satisfactory. Longest clean-air streaks: Chennai 53 days, Gummidipoondi 49 days.
Year-over-year progress
Chennai has improved by 25 AQI points (26.9%) from 2017 to 2024; Gummidipoondi has worsened by 8 AQI points (8.1%) over the same window. The worst recorded day for Chennai reached AQI 391 at Kodungaiyur (TNPCB) on 2021-05-14; Gummidipoondi hit AQI 326 at Anthoni Pillai Nagar (TNPCB) on 2023-12-22.
Station-level disparity
Chennai spans 9 CPCB stations with a 27-point spread (min 63, max 90); Gummidipoondi spans 1 stations with a 0-point spread (min 99, max 99).