London’s air quality remains a critical public health and operational concern. As Britain’s largest city and a global business hub, Greater London faces complex air quality challenges shaped by vehicle emissions, heating systems, and industrial activity. This article examines current pollution levels, the transformative impact of the Ultra Low Emission Zone (ULEZ), health consequences, and the monitoring infrastructure that keeps the city accountable.

Current Air Quality Status in London

London’s air quality index stands at 63 as of February 2026, reflecting moderate pollution levels. The breakdown of current pollutants shows:

• PM2.5 (Fine Particulate Matter): AQI 63 – Above ideal levels
• PM10 (Respirable Particulate Matter): AQI 20 – Relatively low
• NO₂ (Nitrogen Dioxide): AQI 21 – Relatively low