Chennai vs Ooty
Side-by-side air quality comparison between Chennai and Ooty.
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 Ooty averaged 58 — a 10-point (17%) gap, with Chennai the more polluted and Ooty the cleaner of the two. On 315 days when both cities reported, Ooty was cleaner on 299 of them; the average daily gap was 56 AQI points.
Seasonality & days
Chennai peaks in December, while Ooty peaks in May. Chennai logged 0% Severe days and 57.5% Good-or-Satisfactory days; Ooty was 0% Severe and 94.2% Good-or-Satisfactory. Longest clean-air streaks: Chennai 53 days, Ooty 22 days.
Year-over-year progress
Chennai has improved by 25 AQI points (26.9%) from 2017 to 2024; Ooty is essentially flat over the same window. The worst recorded day for Chennai reached AQI 391 at Kodungaiyur (TNPCB) on 2021-05-14; Ooty hit AQI 164 at Bombay Castel (TNPCB) on 2024-12-17.
Station-level disparity
Chennai spans 9 CPCB stations with a 27-point spread (min 63, max 90); Ooty spans 1 stations with a 0-point spread (min 59, max 59).