Siwan vs Tumkur
Side-by-side air quality comparison between Siwan and Tumkur.
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 Tumkur averaged 88 — a 60-point (68%) gap, with Siwan the more polluted and Tumkur the cleaner of the two. On 381 days when both cities reported, Tumkur was cleaner on 316 of them; the average daily gap was 82 AQI points.
Seasonality & days
Siwan peaks in January, while Tumkur peaks in December. Siwan logged 5.2% Severe days and 17.7% Good-or-Satisfactory days; Tumkur was 0% Severe and 54% Good-or-Satisfactory. Longest clean-air streaks: Siwan 13 days, Tumkur 20 days.
Year-over-year progress
Siwan has improved by 184 AQI points (55.4%) from 2021 to 2024; Tumkur has improved by 69 AQI points (43.9%) over the same window. The worst recorded day for Siwan reached AQI 488 at Chitragupta Nagar (BSPCB) on 2022-12-30; Tumkur hit AQI 355 at Thimmalapura (KSPCB) on 2023-02-15.
Station-level disparity
Siwan spans 1 CPCB stations with a 0-point spread (min 197, max 197); Tumkur spans 1 stations with a 0-point spread (min 97, max 97).