Chennai vs Nārnaul
Side-by-side air quality comparison between Chennai and Nārnaul.
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 Nārnaul averaged 94 — a 26-point (38%) gap, with Nārnaul the more polluted and Chennai the cleaner of the two. On 1582 days when both cities reported, Chennai was cleaner on 849 of them; the average daily gap was 66 AQI points.
Seasonality & days
Chennai peaks in December, while Nārnaul peaks in November. Chennai logged 0% Severe days and 57.5% Good-or-Satisfactory days; Nārnaul was 0.1% Severe and 40.8% Good-or-Satisfactory. Longest clean-air streaks: Chennai 53 days, Nārnaul 63 days.
Year-over-year progress
Chennai has improved by 25 AQI points (26.9%) from 2017 to 2024; Nārnaul has improved by 37 AQI points (28.2%) over the same window. The worst recorded day for Chennai reached AQI 391 at Kodungaiyur (TNPCB) on 2021-05-14; Nārnaul hit AQI 435 at Shastri Nagar (HSPCB) on 2023-11-16.
Station-level disparity
Chennai spans 9 CPCB stations with a 27-point spread (min 63, max 90); Nārnaul spans 1 stations with a 0-point spread (min 130, max 130).