![]() Trends in concentrations of PM10 in the UK, 1992 to 2021 2.1 Annual mean concentrations of PM10 in the UK, 1992 to 2021 The Air Quality Standards Regulations 2010 require that concentrations of PM in the UK must not exceed:Ī 24-hour average of 50 µg/m 3 more than 35 times in a single year for PM10 Īn annual average of 20 µg/m 3 for PM2.5.Ģ. As such, it is in the interest of the UK to measure concentrations of PM as close to these sources of anthropogenic emissions as possible in order to effectively assess exposure to PM that can tackled via UK policies. However, around half of UK concentrations of PM comes from anthropogenic sources in the UK such as domestic wood burning and tyre and brake wear from vehicles. Another third is transported to the UK from other European countries. ![]() A small proportion of the concentrations of PM that people in the UK are exposed to come from naturally occurring sources such as pollen and sea spray (approximately 15 per cent). The UK is currently focused on measuring the fractions of PM where particles are less than 10 micrometres in diameter (PM10) and less than 2.5 micrometres in diameter (PM2.5) based on the latest evidence on the effects of PM to health.īoth PM and the precursor pollutants that can form it can travel large distances in the atmosphere. As a result, particulates are classified according to size. Therefore, exposure to PM can result in serious impacts to health, especially in vulnerable groups of people such as the young, elderly, and those with respiratory problems. Due to the small size of many of the particles that form PM some of these toxins may enter the bloodstream and be transported around the body, lodging in the heart, brain and other organs. Particulate matter (PM) is everything in the air that is not a gas and therefore consists of a huge variety of chemical compounds and materials, some of which can be toxic. National Statistics Air quality statistics in the UK, 1987 to 2021 - Particulate matter (PM10/PM2.5) Updated 28 April 2022 1.
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