Purnia vs Tirunelveli
Side-by-side air quality comparison between Purnia and Tirunelveli.
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 | Tirunelveli |
|---|---|---|
| PM2.5(µg/m³) | 105.90 | 4.40 |
| PM10(µg/m³) | 109.00 | 5.20 |
| NO₂(µg/m³) | 25.20 | 5.50 |
| SO₂(µg/m³) | 20.10 | 1.80 |
| O₃(µg/m³) | 67.00 | 30.00 |
| CO(µg/m³) | 707.00 | 151.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Purnia averaged an AQI of 133 while Tirunelveli averaged 30 — a 103-point (343%) gap, with Purnia the more polluted and Tirunelveli the cleaner of the two. On 94 days when both cities reported, Tirunelveli was cleaner on 93 of them; the average daily gap was 105 AQI points.
Seasonality & days
Purnia peaks in January, while Tirunelveli peaks in October. Purnia logged 3.7% Severe days and 33.699999999999996% Good-or-Satisfactory days; Tirunelveli was 0% Severe and 100% Good-or-Satisfactory. Longest clean-air streaks: Purnia 14 days, Tirunelveli 31 days.
Year-over-year progress
The worst recorded day for Purnia reached AQI 460 at Mariam Nagar (BSPCB) on 2022-12-15; Tirunelveli hit AQI 42 at Municipal Corporation Office (TNPCB) on 2024-10-30.
Station-level disparity
Purnia spans 1 CPCB stations with a 0-point spread (min 176, max 176); Tirunelveli spans 1 stations with a 0-point spread (min 30, max 30).
Verdict
🏆 Tirunelveli has better air quality with an AQI of 7 compared to Purnia's 253. That's a significant difference of 246 points.