Purnia vs Thrissur
Side-by-side air quality comparison between Purnia and Thrissur.
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 | Thrissur |
|---|---|---|
| PM2.5(µg/m³) | 105.90 | 8.60 |
| PM10(µg/m³) | 109.00 | 10.10 |
| NO₂(µg/m³) | 25.20 | 9.80 |
| SO₂(µg/m³) | 20.10 | 3.30 |
| O₃(µg/m³) | 67.00 | 29.00 |
| CO(µg/m³) | 707.00 | 163.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Purnia averaged an AQI of 133 while Thrissur averaged 57 — a 76-point (133%) gap, with Purnia the more polluted and Thrissur the cleaner of the two. On 659 days when both cities reported, Thrissur was cleaner on 605 of them; the average daily gap was 109 AQI points.
Seasonality & days
Purnia peaks in January, while Thrissur peaks in February. Purnia logged 3.7% Severe days and 33.699999999999996% Good-or-Satisfactory days; Thrissur was 0% Severe and 88.4% Good-or-Satisfactory. Longest clean-air streaks: Purnia 14 days, Thrissur 52 days.
Year-over-year progress
Purnia has improved by 163 AQI points (55.1%) from 2021 to 2024; Thrissur has improved by 21 AQI points (26.9%) over the same window. The worst recorded day for Purnia reached AQI 460 at Mariam Nagar (BSPCB) on 2022-12-15; Thrissur hit AQI 181 at Corporation Ground Thrissur (PCB) on 2023-01-09.
Station-level disparity
Purnia spans 1 CPCB stations with a 0-point spread (min 176, max 176); Thrissur spans 1 stations with a 0-point spread (min 68, max 68).
Verdict
🏆 Thrissur has better air quality with an AQI of 14 compared to Purnia's 253. That's a significant difference of 239 points.