What is the air quality in Siwan?

Siwan, India has an annual US AQI of 165 (Polluted) and average PM2.5 of 85.2 µg/m³, ranking #5844 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Siwan?

August is typically the cleanest month (AQI 92) and December the most polluted (AQI 253).

Where does Siwan's air quality data come from?

PM2.5: 1998–2026 (monitors 2021–2026, satellite 1998–2022, 2024; 2026 provisional). Measured by government monitoring stations. Full sources are on the methodology page.

Siwan, India — Air Quality & Clean City Guide 2026

Siwan Air Quality Data

Global rank	City	Continent	AQI	PM2.5
5844	Siwan, India	Asia	AQI 165	PM2.5 85.2 µg/m³