What is the air quality in St Helens?

St Helens, United Kingdom has an annual US AQI of 53 (Reasonable) and average PM2.5 of 11 µg/m³, ranking #1082 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in St Helens?

August is typically the cleanest month (AQI 43) and March the most polluted (AQI 60).

PM2.5: 1998–2024 (satellite). From satellite data, because no government monitor covers the city. Full sources are on the methodology page.

Global rank	City	Continent	AQI	PM2.5
1082	St Helens, United Kingdom	Europe	AQI 53	PM2.5 11 µg/m³