TrueBreath - Smoke Equivalence Calculator - London

Breathing air in London is equivalent to smoking approximately 1.5 cigarettes per day, based on the current PM2.5 level of 34.0 μg/m³.

London's current PM2.5 level is 34.0 μg/m³. The WHO safe limit is 15 μg/m³ for 24-hour exposure. This exceeds the safe limit and poses health risks.

With a PM2.5 level of 34.0 μg/m³, London's air quality may cause minor health issues, particularly for people with respiratory conditions. It's advisable to limit outdoor activities during high pollution periods.

The Real-Time Air Quality Index (AQI) in London is 34. This is considered Good. AQI values above 100 indicate unhealthy air quality, especially for sensitive groups.

The primary pollutant affecting London's air quality is PM2.5. This pollutant is the main contributor to the current AQI of 34 and PM2.5 level of 34.0 μg/m³.

London's current PM10 level is 20.0 μg/m³, while PM2.5 is 34.0 μg/m³. PM10 particles are larger (2.5-10 micrometers) and less harmful than PM2.5, which can penetrate deep into the lungs and bloodstream.

The current ozone (O3) level in London is 5.7 μg/m³. Ozone is a harmful gas that can cause respiratory problems, especially during physical activity. The WHO guideline for 8-hour exposure is 100 μg/m³.

The nitrogen dioxide (NO2) level in London is currently 22.4 μg/m³. NO2 is primarily produced by vehicle emissions and industrial processes. High levels can worsen respiratory conditions and increase susceptibility to respiratory infections.