Chennai vs Kochi
Side-by-side air quality comparison between Chennai and Kochi.
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 Kochi averaged 91 — a 23-point (34%) gap, with Kochi the more polluted and Chennai the cleaner of the two. On 902 days when both cities reported, Kochi was cleaner on 595 of them; the average daily gap was 40 AQI points.
Seasonality & days
Chennai peaks in December, while Kochi peaks in January. Chennai logged 0% Severe days and 57.5% Good-or-Satisfactory days; Kochi was 0% Severe and 70.9% Good-or-Satisfactory. Longest clean-air streaks: Chennai 53 days, Kochi 80 days.
Year-over-year progress
Chennai has improved by 25 AQI points (26.9%) from 2017 to 2024; Kochi has worsened by 7 AQI points (8.3%) over the same window. The worst recorded day for Chennai reached AQI 391 at Kodungaiyur (TNPCB) on 2021-05-14; Kochi hit AQI 293 at Vyttila Kochi (PCB) on 2022-12-08.
Station-level disparity
Chennai spans 9 CPCB stations with a 27-point spread (min 63, max 90); Kochi spans 1 stations with a 0-point spread (min 88, max 88).