Purnia vs Ramanathapuram
Side-by-side air quality comparison between Purnia 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 | Purnia | Ramanathapuram |
|---|---|---|
| PM2.5(µg/m³) | 105.90 | 5.60 |
| PM10(µg/m³) | 109.00 | 8.30 |
| NO₂(µg/m³) | 25.20 | 4.20 |
| SO₂(µg/m³) | 20.10 | 4.00 |
| O₃(µg/m³) | 67.00 | 31.00 |
| CO(µg/m³) | 707.00 | 143.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Purnia averaged an AQI of 133 while Ramanathapuram averaged 42 — a 91-point (217%) gap, with Purnia the more polluted and Ramanathapuram the cleaner of the two. On 561 days when both cities reported, Ramanathapuram was cleaner on 543 of them; the average daily gap was 131 AQI points.
Seasonality & days
Both cities see their worst air in January on average. Purnia logged 3.7% Severe days and 33.699999999999996% Good-or-Satisfactory days; Ramanathapuram was 0% Severe and 94.4% Good-or-Satisfactory. Longest clean-air streaks: Purnia 14 days, Ramanathapuram 46 days.
Year-over-year progress
Purnia has improved by 163 AQI points (55.1%) from 2021 to 2024; Ramanathapuram has improved by 18 AQI points (30%) over the same window. The worst recorded day for Purnia reached AQI 460 at Mariam Nagar (BSPCB) on 2022-12-15; Ramanathapuram hit AQI 246 at Chalai Bazaar (TNPCB) on 2022-12-07.
Station-level disparity
Purnia spans 1 CPCB stations with a 0-point spread (min 176, max 176); Ramanathapuram spans 1 stations with a 0-point spread (min 48, max 48).
Verdict
🏆 Ramanathapuram has better air quality with an AQI of 9 compared to Purnia's 253. That's a significant difference of 244 points.