Chennai vs Firozabad
Side-by-side air quality comparison between Chennai and Firozabad.
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 Firozabad averaged 73 — a 5-point (7%) gap, with Firozabad the more polluted and Chennai the cleaner of the two. On 862 days when both cities reported, Firozabad was cleaner on 465 of them; the average daily gap was 60 AQI points.
Seasonality & days
Chennai peaks in December, while Firozabad peaks in January. Chennai logged 0% Severe days and 57.5% Good-or-Satisfactory days; Firozabad was 0.6% Severe and 56.6% Good-or-Satisfactory. Longest clean-air streaks: Chennai 53 days, Firozabad 68 days.
Year-over-year progress
Chennai has improved by 25 AQI points (26.9%) from 2017 to 2024; Firozabad has improved by 70 AQI points (49%) over the same window. The worst recorded day for Chennai reached AQI 391 at Kodungaiyur (TNPCB) on 2021-05-14; Firozabad hit AQI 489 at Nagla Bhau (UPPCB) on 2021-11-09.
Station-level disparity
Chennai spans 9 CPCB stations with a 27-point spread (min 63, max 90); Firozabad spans 2 stations with a 19-point spread (min 88, max 107).