Motihari vs Siwan
Side-by-side air quality comparison between Motihari and Siwan.
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 | Motihari | Siwan |
|---|---|---|
| PM2.5(µg/m³) | 152.70 | 114.60 |
| PM10(µg/m³) | 170.90 | 125.70 |
| NO₂(µg/m³) | 59.80 | 44.50 |
| SO₂(µg/m³) | 22.90 | 15.40 |
| O₃(µg/m³) | 45.00 | 54.00 |
| CO(µg/m³) | 1174.00 | 761.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Motihari averaged an AQI of 116 while Siwan averaged 148 — a 32-point (28%) gap, with Siwan the more polluted and Motihari the cleaner of the two. On 694 days when both cities reported, Motihari was cleaner on 491 of them; the average daily gap was 62 AQI points.
Seasonality & days
Motihari peaks in November, while Siwan peaks in January. Motihari logged 1.2% Severe days and 39.1% Good-or-Satisfactory days; Siwan was 5.2% Severe and 17.7% Good-or-Satisfactory. Longest clean-air streaks: Motihari 26 days, Siwan 13 days.
Year-over-year progress
Motihari has improved by 106 AQI points (47.7%) from 2021 to 2024; Siwan has improved by 184 AQI points (55.4%) over the same window. The worst recorded day for Motihari reached AQI 448 at Gandak Colony (BSPCB) on 2022-11-17; Siwan hit AQI 488 at Chitragupta Nagar (BSPCB) on 2022-12-30.
Station-level disparity
Motihari spans 1 CPCB stations with a 0-point spread (min 153, max 153); Siwan spans 1 stations with a 0-point spread (min 197, max 197).
Verdict
🏆 Siwan has better air quality with an AQI of 282 compared to Motihari's 326.