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Part C - Italy Commonality (June, 1st 2010) State and Impact
The most critical pollutants, given the high concentrations in the air, continue to be tropospheric ozone (O3) during the summer months, PM10 atmospheric particulate (particle material at a size of less than 10 millionths of a meter) especially in the winter months, and nitrogen dioxide (NO2), despite the downward trend of emissions in recent years.
In 2007, 57 % of the stations registered exceedances of the daily limit value of PM10 on more than 35 days (Figure 1); the 35-day limit is often reached as early as the first half of February.
The World Health Organization (WHO) recently estimated, based on a study carried out in the years 2002-2004 in Italy’s largest cities, that more than 8 000 deaths a year can be attributed to average concentrations of PM10 greater than 20 mg/m3.
The highest levels of ozone are registered during the summer season and in areas where the impact of traffic is not direct. The long-term objective for the protection of human health (120 mg/m3) was exceeded by the vast majority of the stations: during the summer period of 2008, only 11 % of the stations did not register exceedances of the long-term objective (Figure 2).
Ozone also has negative effects on human health, though to a lesser extent than PM10. In the above mentioned study, WHO estimated that approximately 500 deaths a year can be attributed to this pollutant.
In the case of nitrogen dioxide, the annual limit value for the protection of human health (40 µg/m3), which shall enter into force in 2010, was met by 65 % of the stations in 2007 (Figure 3) (http://annuario.apat.it/capitoli/Ver_6/en/Air%20quality.pdf - Paragraph ‘Air Quality’, pg 74).
For references, please go to https://www.eea.europa.eu/soer/2010/countries/it/air-pollution-state-and-impacts-italy or scan the QR code.
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