Coimbatore vs Ramanathapuram
Side-by-side air quality comparison between Coimbatore 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
Pollutant-level comparison (PM2.5, PM10, O3, NO2, SO2, CO)▾
| Pollutant | Coimbatore | Ramanathapuram |
|---|---|---|
| PM2.5(µg/m³) | 2.50 | 5.80 |
| PM10(µg/m³) | 3.00 | 8.80 |
| NO₂(µg/m³) | 4.60 | 4.80 |
| SO₂(µg/m³) | 2.00 | 4.10 |
| O₃(µg/m³) | 40.00 | 31.00 |
| CO(µg/m³) | 163.00 | 141.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Coimbatore averaged an AQI of 66 while Ramanathapuram averaged 42 — a 24-point (57%) gap, with Coimbatore the more polluted and Ramanathapuram the cleaner of the two. On 305 days when both cities reported, Ramanathapuram was cleaner on 252 of them; the average daily gap was 32 AQI points.
Seasonality & days
Coimbatore peaks in November, while Ramanathapuram peaks in January. Coimbatore logged 0% Severe days and 90.5% Good-or-Satisfactory days; Ramanathapuram was 0% Severe and 94.4% Good-or-Satisfactory. Longest clean-air streaks: Coimbatore 32 days, Ramanathapuram 46 days.
Year-over-year progress
Coimbatore has improved by 5 AQI points (7%) from 2019 to 2024; Ramanathapuram has improved by 18 AQI points (30%) over the same window. The worst recorded day for Coimbatore reached AQI 279 at SIDCO Kurichi (TNPCB) on 2024-09-28; Ramanathapuram hit AQI 246 at Chalai Bazaar (TNPCB) on 2022-12-07.
Station-level disparity
Coimbatore spans 2 CPCB stations with a 1-point spread (min 63, max 64); Ramanathapuram spans 1 stations with a 0-point spread (min 48, max 48).
Verdict
🏆 Coimbatore has better air quality with an AQI of 4 compared to Ramanathapuram's 10.