Ramanathapuram vs Siwan
Side-by-side air quality comparison between Ramanathapuram and Siwan.
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 | Ramanathapuram | Siwan |
|---|---|---|
| PM2.5(µg/m³) | 5.80 | 114.60 |
| PM10(µg/m³) | 8.80 | 125.70 |
| NO₂(µg/m³) | 4.80 | 44.50 |
| SO₂(µg/m³) | 4.10 | 15.40 |
| O₃(µg/m³) | 31.00 | 54.00 |
| CO(µg/m³) | 141.00 | 761.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Ramanathapuram averaged an AQI of 42 while Siwan averaged 148 — a 106-point (252%) gap, with Siwan the more polluted and Ramanathapuram the cleaner of the two. On 538 days when both cities reported, Ramanathapuram was cleaner on 521 of them; the average daily gap was 149 AQI points.
Seasonality & days
Both cities see their worst air in January on average. Ramanathapuram logged 0% Severe days and 94.4% Good-or-Satisfactory days; Siwan was 5.2% Severe and 17.7% Good-or-Satisfactory. Longest clean-air streaks: Ramanathapuram 46 days, Siwan 13 days.
Year-over-year progress
Ramanathapuram has improved by 18 AQI points (30%) from 2022 to 2024; Siwan has improved by 184 AQI points (55.4%) over the same window. The worst recorded day for Ramanathapuram reached AQI 246 at Chalai Bazaar (TNPCB) on 2022-12-07; Siwan hit AQI 488 at Chitragupta Nagar (BSPCB) on 2022-12-30.
Station-level disparity
Ramanathapuram spans 1 CPCB stations with a 0-point spread (min 48, max 48); Siwan spans 1 stations with a 0-point spread (min 197, max 197).
Verdict
🏆 Ramanathapuram has better air quality with an AQI of 10 compared to Siwan's 282. That's a significant difference of 272 points.