Chennai vs Tonk
Side-by-side air quality comparison between Chennai and Tonk.
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 Tonk averaged 142 — a 74-point (109%) gap, with Tonk the more polluted and Chennai the cleaner of the two. On 299 days when both cities reported, Chennai was cleaner on 209 of them; the average daily gap was 66 AQI points.
Seasonality & days
Chennai peaks in December, while Tonk peaks in November. Chennai logged 0% Severe days and 57.5% Good-or-Satisfactory days; Tonk was 0% Severe and 28.200000000000003% Good-or-Satisfactory. Longest clean-air streaks: Chennai 53 days, Tonk 11 days.
Year-over-year progress
Chennai has improved by 25 AQI points (26.9%) from 2017 to 2024; Tonk has improved by 14 AQI points (9%) over the same window. The worst recorded day for Chennai reached AQI 391 at Kodungaiyur (TNPCB) on 2021-05-14; Tonk hit AQI 368 at Shastri Nagar (RSPCB) on 2023-11-17.
Station-level disparity
Chennai spans 9 CPCB stations with a 27-point spread (min 63, max 90); Tonk spans 1 stations with a 0-point spread (min 148, max 148).