Air Quality Index (AQI) in Guernsey 🇬🇬

Live Air Quality Index (AQI) and PM2.5 Levels in Guernsey

Currently, the Air Quality Index (AQI) in Saint Peter Port, the capital of Guernsey, is measured at a score of 14. According to the US EPA health standard, this air quality rating is categorized as Good. The current atmosphere in Saint Peter Port is influenced by a PM2.5 (fine particulate matter) concentration of 2.6 µg/m³ and PM10 levels recorded at 6.2 µg/m³. Monitoring of gaseous pollutants shows Nitrogen Dioxide (NO2) at 1.9 µg/m³.

Guernsey Air Quality: Major Cities Index

Saint Peter Port
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* Air Quality Index (AQI) data for Guernsey is calculated using the US EPA standard. Information is processed from multiple monitoring stations detecting PM2.5, PM10, and gaseous pollutants to ensure accuracy for respiratory health planning.

Health & Scientific Resources

→ How to read US EPA Air Quality Index before going outside → Understanding Air Quality Index levels and what they mean → When haze forms and what it does to air quality

Air Quality in Guernsey — FAQ

Common questions about AQI levels, pollutants, and data sources for Guernsey.

What is the current air quality in Guernsey?

Live AQI readings for 1 city(ies) across Guernsey are listed above on the US EPA 0-500 scale.

Where does Guernsey's AQI data come from?

Real-time readings come from ground-based monitoring stations operated by national environmental agencies in Guernsey, delivered via WeatherAPI.com and aggregated using the EPA AQI formula.

What is a healthy AQI value in Guernsey?

On the EPA scale used worldwide, 0-50 is Good, 51-100 is Moderate, 101-150 is Unhealthy for sensitive groups, 151-200 is Unhealthy, 201-300 is Very Unhealthy, and 301-500 is Hazardous. The WHO 24-hour PM2.5 guideline is 15 μg/m³.

Why do AQI readings vary between cities in Guernsey?

Air quality is highly local — major pollution sources (traffic, industry, dust, wildfires) cluster around cities, while wind direction and topography move them around. Comparing nearby readings on this page is the best way to see how conditions change across Guernsey.