Kollam vs Ramanathapuram
Side-by-side air quality comparison between Kollam 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 | Kollam | Ramanathapuram |
|---|---|---|
| PM2.5(µg/m³) | 5.50 | 5.60 |
| PM10(µg/m³) | 7.90 | 8.30 |
| NO₂(µg/m³) | 3.80 | 4.20 |
| SO₂(µg/m³) | 1.60 | 4.00 |
| O₃(µg/m³) | 33.00 | 31.00 |
| CO(µg/m³) | 96.00 | 143.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Kollam averaged an AQI of 84 while Ramanathapuram averaged 42 — a 42-point (100%) gap, with Kollam the more polluted and Ramanathapuram the cleaner of the two. On 592 days when both cities reported, Ramanathapuram was cleaner on 521 of them; the average daily gap was 38 AQI points.
Seasonality & days
Both cities see their worst air in January on average. Kollam logged 0% Severe days and 81% Good-or-Satisfactory days; Ramanathapuram was 0% Severe and 94.4% Good-or-Satisfactory. Longest clean-air streaks: Kollam 65 days, Ramanathapuram 46 days.
Year-over-year progress
Kollam has improved by 2 AQI points (2.3%) from 2020 to 2024; Ramanathapuram has improved by 18 AQI points (30%) over the same window. The worst recorded day for Kollam reached AQI 272 at Polayathode Kollam (PCB) on 2024-04-06; Ramanathapuram hit AQI 246 at Chalai Bazaar (TNPCB) on 2022-12-07.
Station-level disparity
Kollam spans 1 CPCB stations with a 0-point spread (min 84, max 84); Ramanathapuram spans 1 stations with a 0-point spread (min 48, max 48).
Verdict
Both Kollam and Ramanathapuram have the same AQI of 9 right now.