







The United Nations agency working to promote health, keep the world safe and serve the vulnerable.
Air pollution is the EU's number one environmental health problem. It causes serious illnesses such as asthma, cardiovascular problems, lung cancer, and affects vulnerable groups the most. It also damages the environment and ecosystems through excess nitrogen pollution, acid rain and ground-level ozone, proving costly for our economy, as it leads to lost working days and higher healthcare costs.
The EU air quality standards and objectives are summarised in the table below. These apply over different periods of time because the observed health impacts associated with the various pollutants occur over different exposure times. Under EU law, a limit value is legally binding from the date it enters into force subject to any exceedances permitted by the legislation. For a target value, the ...
Air pollution kills an estimated seven million people worldwide every year. WHO data shows that 9 out of 10 people breathe air containing high levels of pollutants. WHO is working with countries to monitor air pollution and improve air quality.
WHO's air quality database compiles data on ground measurements of annual mean concentrations of particulate matter of a diameter equal to or smaller than 10 μm (PM10) or equal to or smaller than 2.5 μm (PM2.5) which aim at representing an average for the city or town as a whole, rather than for individual stations. The database currently hosts 4300 human settlements in 108 countries and is ...
There are two main types of air pollution: ambient air pollution (outdoor pollution) and household air pollution (indoor air pollution). Ambient air pollution is a major environmental health problem affecting everyone in low-, middle-, and high-income countries as its source – combustion of fossil fuel – is ubiquitous.
This interactive tool provides a snapshot – in the form of a map – of current national air quality standards for classical pollutants (particulate matter, nitrogen dioxide, ozone, carbon monoxide and sulphur dioxide) for various averaging times. The WHO Air Quality Guidelines values and interim targets are provided as references. The data was compiled by the Swiss Tropical and Public ...
Why does WHO publish Air quality guidelines? Clean air is a basic human right. Yet, air pollution continues to pose a significant threat to people worldwide – it is the greatest environmental threat to health and a leading cause of non-communicable diseases (NCDs) such as heart attacks or stroke.
The air quality of the city has been a major public health problem causing air pollution-related morbidity and mortality, placing an economic burden on the country due to loss of productivity and over-utilization of health system resources.

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