Chennai vs Tālcher
Side-by-side air quality comparison between Chennai and Tālcher.
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 Tālcher averaged 127 — a 59-point (87%) gap, with Tālcher the more polluted and Chennai the cleaner of the two. On 1360 days when both cities reported, Chennai was cleaner on 811 of them; the average daily gap was 60 AQI points.
Seasonality & days
Both cities see their worst air in December on average. Chennai logged 0% Severe days and 57.5% Good-or-Satisfactory days; Tālcher was 0.2% Severe and 43.1% Good-or-Satisfactory. Longest clean-air streaks: Chennai 53 days, Tālcher 44 days.
Year-over-year progress
Chennai has improved by 25 AQI points (26.9%) from 2017 to 2024; Tālcher has improved by 63 AQI points (33.2%) over the same window. The worst recorded day for Chennai reached AQI 391 at Kodungaiyur (TNPCB) on 2021-05-14; Tālcher hit AQI 414 at Talcher (OSPCB) on 2018-11-27.
Station-level disparity
Chennai spans 9 CPCB stations with a 27-point spread (min 63, max 90); Tālcher spans 1 stations with a 0-point spread (min 132, max 132).