Chennai vs Kolār
Side-by-side air quality comparison between Chennai and Kolār.
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 Kolār averaged 65 — a 3-point (5%) gap, with Chennai the more polluted and Kolār the cleaner of the two. On 990 days when both cities reported, Kolār was cleaner on 836 of them; the average daily gap was 52 AQI points.
Seasonality & days
Chennai peaks in December, while Kolār peaks in September. Chennai logged 0% Severe days and 57.5% Good-or-Satisfactory days; Kolār was 0.9% Severe and 85.30000000000001% Good-or-Satisfactory. Longest clean-air streaks: Chennai 53 days, Kolār 17 days.
Year-over-year progress
Chennai has improved by 25 AQI points (26.9%) from 2017 to 2024; Kolār has improved by 56 AQI points (46.3%) over the same window. The worst recorded day for Chennai reached AQI 391 at Kodungaiyur (TNPCB) on 2021-05-14; Kolār hit AQI 500 at Tamaka Ind Area (KSPCB) on 2018-09-18.
Station-level disparity
Chennai spans 9 CPCB stations with a 27-point spread (min 63, max 90); Kolār spans 1 stations with a 0-point spread (min 71, max 71).