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Daily Air Quality Index (DAQI)
- The Daily Air Quality Index (DAQI) tells you about levels of air pollution and provides recommended actions and health advice. The index is numbered 1-10 and divided into four bands, low (1) to very high (10), to provide detail about air pollution levels in a simple way, similar to the sun index or pollen index.
uk-air.defra.gov.uk/air-pollution/daqi
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The report, together with the family of UK Air Quality websites (UK-AIR, Air Quality in Scotland, the Welsh Air Quality Forum website and Air Quality in Northern Ireland) provides the most...
Apr 23, 2014 · Improvements in air quality help reduce harm to human health and the environment. Air quality in the UK is strongly linked to the emissions of air pollutants originating from human activity.
Sep 22, 2022 · Air quality across the globe continues to deteriorate due to increasing emissions, threatening human health and contributing to climate change, biodiversity loss, and pollution and waste. According to the World Health Organization, 99 per cent of the global population breathes unclean air, and air pollution causes 7 million premature deaths a year.
- Why Measure Pm?
- Trends in Concentrations of PM10 in The UK, 1992 to 2023
- Trends in Concentrations of PM2.5 in The UK, 2009 to 2023
- Average Hours Spent in ‘Moderate’ Or Higher PM Pollution
- Temporal Variations in Concentrations of PM2.5 in The UK, 2023
Particulate matter (PM) is everything in the air that is not a gas. It consists of a huge variety of chemical compounds and materials, some of which can be toxic. 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...
2.1 Annual mean concentrations of PM10 in the UK, 1992 to 2023
The PM10 index shows the annual mean, averaged over all included sites that had annual data capture greater than or equal to 75 per cent. The shaded areas represent the 95 per cent confidence interval for the annual mean concentration for roadside sites and urban background sites. These intervals narrow over time because of an increase in the number of monitoring sites for both roadside and urban background sites; and also because there is a reduction in the spatial variation as PM10 emission...
3.1 Annual mean concentrations of PM2.5 in the UK, 2009 to 2023
The PM2.5 index shows the annual mean, averaged over all sites that had annual data capture greater than or equal to 75 per cent. The shaded areas represent the 95 per cent confidence interval for the annual mean concentration for roadside sites and urban background sites. The interval for roadside sites narrows over time because of an increase in the number of monitoring sites and a reduction in the variation between annual means for PM2.5 measured at roadside sites. Annual means for individ...
This metric measures the annual trend in the number of hours per monitoring site that concentrations are recorded at levels of moderate or higher. For example, ‘Moderate’ air pollution (which requires action by citizens who are vulnerable to the health impacts of air pollution) for PM10 is triggered when the latest 24-hour running mean concentratio...
5.1 Monthly variations
The PM2.5 index shows the monthly mean, averaged over all sites that had monthly data capture greater than or equal to 75 per cent in a given year. The shaded areas represent the 95 per cent confidence interval for the monthly mean concentration for roadside sites and urban background sites. Figure 11: Monthly mean PM2.5 concentration at roadside and urban background sites, 2023 View the data for this chart Download the data for this chart in CSV format In recent years the highest PM2.5 conce...
5.2 Hourly variations
The PM2.5 index shows the hourly mean, averaged over all included sites that had data capture greater than or equal to 75 per cent for all instances of that hour in a given year. The shaded areas represent the 95 per cent confidence interval for the hourly mean concentration for roadside sites and urban background sites. Figure 12: Hourly mean PM2.5 concentration at roadside and urban background sites, 2023 View the data for this chart Download the data for this chart in CSV format PM2.5 conc...
Aug 4, 2018 · The air quality index ranges from 0 to 500, though air quality can be indexed beyond 500 when there are higher levels of hazardous air pollution. Good air quality ranges from 0 to 50, while measurements over 300 are considered hazardous.
Jan 14, 2019 · Many substances can affect air quality. We’re committed to improving air quality in the UK by reducing emissions of the 5 most damaging pollutants. Emissions are the pollution released into the...
The Daily Air Quality Index (DAQI) tells you about levels of air pollution and provides recommended actions and health advice. The index is numbered 1-10 and divided into four bands, low (1) to...
