Siwan vs Tālcher
Side-by-side air quality comparison between Siwan and Tālcher.
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 Tālcher averaged 127 — a 21-point (17%) gap, with Siwan the more polluted and Tālcher the cleaner of the two. On 487 days when both cities reported, Tālcher was cleaner on 427 of them; the average daily gap was 122 AQI points.
Seasonality & days
Siwan peaks in January, while Tālcher peaks in December. Siwan logged 5.2% Severe days and 17.7% Good-or-Satisfactory days; Tālcher was 0.2% Severe and 43.1% Good-or-Satisfactory. Longest clean-air streaks: Siwan 13 days, Tālcher 44 days.
Year-over-year progress
Siwan has improved by 184 AQI points (55.4%) from 2021 to 2024; Tālcher has improved by 63 AQI points (33.2%) over the same window. The worst recorded day for Siwan reached AQI 488 at Chitragupta Nagar (BSPCB) on 2022-12-30; Tālcher hit AQI 414 at Talcher (OSPCB) on 2018-11-27.
Station-level disparity
Siwan spans 1 CPCB stations with a 0-point spread (min 197, max 197); Tālcher spans 1 stations with a 0-point spread (min 132, max 132).