Siwan vs Thiruvananthapuram
Side-by-side air quality comparison between Siwan and Thiruvananthapuram.
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 Thiruvananthapuram averaged 56 — a 92-point (164%) gap, with Siwan the more polluted and Thiruvananthapuram the cleaner of the two. On 490 days when both cities reported, Thiruvananthapuram was cleaner on 472 of them; the average daily gap was 133 AQI points.
Seasonality & days
Both cities see their worst air in January on average. Siwan logged 5.2% Severe days and 17.7% Good-or-Satisfactory days; Thiruvananthapuram was 0% Severe and 92% Good-or-Satisfactory. Longest clean-air streaks: Siwan 13 days, Thiruvananthapuram 172 days.
Year-over-year progress
Siwan has improved by 184 AQI points (55.4%) from 2021 to 2024; Thiruvananthapuram has improved by 11 AQI points (16.4%) over the same window. The worst recorded day for Siwan reached AQI 488 at Chitragupta Nagar (BSPCB) on 2022-12-30; Thiruvananthapuram hit AQI 387 at Plammoodu Thiruvananthapuram (PCB) on 2021-08-30.
Station-level disparity
Siwan spans 1 CPCB stations with a 0-point spread (min 197, max 197); Thiruvananthapuram spans 2 stations with a 7-point spread (min 57, max 64).