Sierra Leone - Particle pollution

PM2.5 air pollution, mean annual exposure (micrograms per cubic meter)

The value for PM2.5 air pollution, mean annual exposure (micrograms per cubic meter) in Sierra Leone was 21.63 as of 2017. As the graph below shows, over the past 27 years this indicator reached a maximum value of 22.53 in 2015 and a minimum value of 17.70 in 2014.

Definition: Population-weighted exposure to ambient PM2.5 pollution is defined as the average level of exposure of a nation's population to concentrations of suspended particles measuring less than 2.5 microns in aerodynamic diameter, which are capable of penetrating deep into the respiratory tract and causing severe health damage. Exposure is calculated by weighting mean annual concentrations of PM2.5 by population in both urban and rural areas.

Source: Brauer, M. et al. 2017, for the Global Burden of Disease Study 2017.

See also:

Year Value
1990 20.73
1995 20.14
2000 20.51
2005 19.31
2010 18.53
2011 18.74
2012 20.10
2013 18.44
2014 17.70
2015 22.53
2016 21.34
2017 21.63

PM2.5 pollution, population exposed to levels exceeding WHO Interim Target-1 value (% of total)

PM2.5 pollution, population exposed to levels exceeding WHO Interim Target-1 value (% of total) in Sierra Leone was 0.000 as of 2017. Its highest value over the past 27 years was 0.000 in 2017, while its lowest value was 0.000 in 1990.

Definition: Percent of population exposed to ambient concentrations of PM2.5 that exceed the World Health Organization (WHO) Interim Target 1 (IT-1) is defined as the portion of a country’s population living in places where mean annual concentrations of PM2.5 are greater than 35 micrograms per cubic meter. The Air Quality Guideline (AQG) of 10 micrograms per cubic meter is recommended by the WHO as the lower end of the range of concentrations over which adverse health effects due to PM2.5 exposure have been observed.

Source: Brauer, M. et al. 2017, for the Global Burden of Disease Study 2017.

See also:

Year Value
1990 0.000
1995 0.000
2000 0.000
2005 0.000
2010 0.000
2011 0.000
2012 0.000
2013 0.000
2014 0.000
2015 0.000
2016 0.000
2017 0.000

PM2.5 pollution, population exposed to levels exceeding WHO Interim Target-2 value (% of total)

PM2.5 pollution, population exposed to levels exceeding WHO Interim Target-2 value (% of total) in Sierra Leone was 1.92 as of 2017. Its highest value over the past 27 years was 3.85 in 2015, while its lowest value was 0.00 in 2005.

Definition: Percent of population exposed to ambient concentrations of PM2.5 that exceed the World Health Organization (WHO) Interim Target 2 (IT-2) is defined as the portion of a country’s population living in places where mean annual concentrations of PM2.5 are greater than 25 micrograms per cubic meter. The Air Quality Guideline (AQG) of 10 micrograms per cubic meter is recommended by the WHO as the lower end of the range of concentrations over which adverse health effects due to PM2.5 exposure have been observed.

Source: Brauer, M. et al. 2017, for the Global Burden of Disease Study 2017.

See also:

Year Value
1990 0.14
1995 0.11
2000 0.19
2005 0.00
2010 0.00
2011 0.00
2012 0.00
2013 0.00
2014 0.00
2015 3.85
2016 1.65
2017 1.92

PM2.5 pollution, population exposed to levels exceeding WHO Interim Target-3 value (% of total)

PM2.5 pollution, population exposed to levels exceeding WHO Interim Target-3 value (% of total) in Sierra Leone was 100.00 as of 2017. Its highest value over the past 27 years was 100.00 in 2017, while its lowest value was 100.00 in 1990.

Definition: Percent of population exposed to ambient concentrations of PM2.5 that exceed the World Health Organization (WHO) Interim Target 3 (IT-3) is defined as the portion of a country’s population living in places where mean annual concentrations of PM2.5 are greater than 15 micrograms per cubic meter. The Air Quality Guideline (AQG) of 10 micrograms per cubic meter is recommended by the WHO as the lower end of the range of concentrations over which adverse health effects due to PM2.5 exposure have been observed.

Source: Brauer, M. et al. 2017, for the Global Burden of Disease Study 2017.

See also:

Year Value
1990 100.00
1995 100.00
2000 100.00
2005 100.00
2010 100.00
2011 100.00
2012 100.00
2013 100.00
2014 100.00
2015 100.00
2016 100.00
2017 100.00

PM2.5 air pollution, population exposed to levels exceeding WHO guideline value (% of total)

PM2.5 air pollution, population exposed to levels exceeding WHO guideline value (% of total) in Sierra Leone was 100.00 as of 2017. Its highest value over the past 27 years was 100.00 in 2017, while its lowest value was 100.00 in 1990.

Definition: Percent of population exposed to ambient concentrations of PM2.5 that exceed the WHO guideline value is defined as the portion of a country’s population living in places where mean annual concentrations of PM2.5 are greater than 10 micrograms per cubic meter, the guideline value recommended by the World Health Organization as the lower end of the range of concentrations over which adverse health effects due to PM2.5 exposure have been observed.

Source: Brauer, M. et al. 2017, for the Global Burden of Disease Study 2017.

See also:

Year Value
1990 100.00
1995 100.00
2000 100.00
2005 100.00
2010 100.00
2011 100.00
2012 100.00
2013 100.00
2014 100.00
2015 100.00
2016 100.00
2017 100.00

Classification

Topic: Environment Indicators

Sub-Topic: Emissions