Chennai vs Ramanathapuram
Side-by-side air quality comparison between Chennai and Ramanathapuram.
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 Ramanathapuram averaged 42 — a 26-point (62%) gap, with Chennai the more polluted and Ramanathapuram the cleaner of the two. On 409 days when both cities reported, Ramanathapuram was cleaner on 389 of them; the average daily gap was 66 AQI points.
Seasonality & days
Chennai peaks in December, while Ramanathapuram peaks in January. Chennai logged 0% Severe days and 57.5% Good-or-Satisfactory days; Ramanathapuram was 0% Severe and 94.4% Good-or-Satisfactory. Longest clean-air streaks: Chennai 53 days, Ramanathapuram 46 days.
Year-over-year progress
Chennai has improved by 25 AQI points (26.9%) from 2017 to 2024; Ramanathapuram has improved by 18 AQI points (30%) over the same window. The worst recorded day for Chennai reached AQI 391 at Kodungaiyur (TNPCB) on 2021-05-14; Ramanathapuram hit AQI 246 at Chalai Bazaar (TNPCB) on 2022-12-07.
Station-level disparity
Chennai spans 9 CPCB stations with a 27-point spread (min 63, max 90); Ramanathapuram spans 1 stations with a 0-point spread (min 48, max 48).