Siliguri vs Thrissur
Side-by-side air quality comparison between Siliguri 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 | Siliguri | Thrissur |
|---|---|---|
| PM2.5(µg/m³) | 77.80 | 8.60 |
| PM10(µg/m³) | 98.30 | 10.10 |
| NO₂(µg/m³) | 11.30 | 9.80 |
| SO₂(µg/m³) | 6.80 | 3.30 |
| O₃(µg/m³) | 115.00 | 29.00 |
| CO(µg/m³) | 523.00 | 163.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Siliguri averaged an AQI of 81 while Thrissur averaged 57 — a 24-point (42%) gap, with Siliguri the more polluted and Thrissur the cleaner of the two. On 769 days when both cities reported, Thrissur was cleaner on 515 of them; the average daily gap was 55 AQI points.
Seasonality & days
Both cities see their worst air in February on average. Siliguri logged 0.1% Severe days and 61.8% Good-or-Satisfactory days; Thrissur was 0% Severe and 88.4% Good-or-Satisfactory. Longest clean-air streaks: Siliguri 180 days, Thrissur 52 days.
Year-over-year progress
Siliguri has improved by 39 AQI points (32.5%) from 2018 to 2024; Thrissur has improved by 21 AQI points (26.9%) over the same window. The worst recorded day for Siliguri reached AQI 415 at Ward-32 Bapupara (WBPCB) on 2018-02-08; Thrissur hit AQI 181 at Corporation Ground Thrissur (PCB) on 2023-01-09.
Station-level disparity
Siliguri spans 1 CPCB stations with a 0-point spread (min 107, max 107); 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 Siliguri's 160. That's a significant difference of 146 points.