UK Air Quality Statistics 2026

Air pollution is the largest environmental risk to public health in the UK. The Committee on the Medical Effects of Air Pollutants (COMEAP) estimates that long-term exposure to outdoor air pollution contributes to approximately 40,000 premature deaths per year, at an estimated economic cost of £20 billion.

Fine particulate matter (PM2.5) is considered the most harmful air pollutant. Domestic wood burning has overtaken road transport as the largest source of PM2.5 in the UK.

The UK has made substantial progress — sulphur dioxide (SO2) has fallen by 78% since 1970 and nitrogen oxides (NOx) by 61%. However, the UK continues to exceed WHO guideline limits for PM2.5 and nitrogen dioxide in many urban areas. Clean Air Zones now operate in Birmingham, Bath, Portsmouth, Bradford, Sheffield and Bristol.

How many people die from air pollution in the UK each year?

Air pollution contributes to approximately 40,000 premature deaths per year in the UK, more than deaths from obesity, alcohol and drug misuse combined.

What are the main sources of air pollution in the UK?

Road transport is the largest source of nitrogen dioxide (NO2). Domestic burning of wood and solid fuels is now the largest source of fine particulate matter (PM2.5). Agriculture contributes significant ammonia emissions.

What are Clean Air Zones?

Clean Air Zones are defined areas where targeted action is taken by charging or restricting the most polluting vehicles. The UK has CAZs in Birmingham, Bath, Portsmouth, Bradford, Sheffield and Bristol. London operates the Ultra Low Emission Zone (ULEZ).

Is UK air quality improving?

Yes, overall. SO2 is down 98%, NOx down 70% and PM10 down 73% from 1970s peaks. However, the UK still exceeds WHO guidelines for PM2.5 in many areas, and domestic wood burning is a growing problem.

What is the UK's legal limit for air pollution?

UK legal limits for air quality are set by the Environment Act 2021. The annual mean limit for NO2 is 40 micrograms per cubic metre. For PM2.5, the UK has set a target to reduce concentrations by 50% by 2040.