Siwan vs Thrissur
Side-by-side air quality comparison between Siwan 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
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Siwan averaged an AQI of 148 while Thrissur averaged 57 — a 91-point (160%) gap, with Siwan the more polluted and Thrissur the cleaner of the two. On 609 days when both cities reported, Thrissur was cleaner on 591 of them; the average daily gap was 125 AQI points.
Seasonality & days
Siwan peaks in January, while Thrissur peaks in February. Siwan logged 5.2% Severe days and 17.7% Good-or-Satisfactory days; Thrissur was 0% Severe and 88.4% Good-or-Satisfactory. Longest clean-air streaks: Siwan 13 days, Thrissur 52 days.
Year-over-year progress
Siwan has improved by 184 AQI points (55.4%) from 2021 to 2024; Thrissur has improved by 21 AQI points (26.9%) over the same window. The worst recorded day for Siwan reached AQI 488 at Chitragupta Nagar (BSPCB) on 2022-12-30; Thrissur hit AQI 181 at Corporation Ground Thrissur (PCB) on 2023-01-09.
Station-level disparity
Siwan spans 1 CPCB stations with a 0-point spread (min 197, max 197); Thrissur spans 1 stations with a 0-point spread (min 68, max 68).