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Update of EEAs Core Set Indicator 004 19 th EIONET Workshop on Air Quality Bern, 30 th September 2014 Alberto Gonzlez Ortiz Project Manager AQ data and policy assessments European Environment Agency

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CSI004: current assessment description 2 Exceedance of air quality limit values in urban areas

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CSI004: need of update 3 EU Air policy review: New policy context New scientific studies Increased use of the indicator : Country level (air pollution country fact sheets) Underestimation of NO 2 population exposure (WHO, countries) Title

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CSI004: indicator specification changes 4 POLLUTANTS PM 10 ; NO 2 ; O 3 ; SO 2 DEFINITION % population potentially exposed above LT/TV METHODOLOGY (Sub)urban background stations Stations averaged over the city: classification by city Number of exceedances: several classes CURRENT CSI004 NEW CSI004 + PM 2.5 ; B(a)P + % population exposed above WHO guidelines + (Sub)urban traffic stations Station by station: classification by station Percentiles: only above or below

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CSI004: current methodology 5 X X X Background average

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CSI004: proposed methodology 6

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7 810 000 = 900 000 90 000 30 000 each 405 000 each

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CSI004: (new) uncertainties 8 Existing ones: station classification; not all the urban population is taken into account; the year-to year changes (meteorological variability; the number of available data series; the geographical coverage of stations) The representativeness of each station is not taken into account. Traffic and background stations are unevenly distributed Simplifications People living closer than 100 m to major roads are the ones exposed to traffic concentrations All cities in a country same percentage Percentages remain constant

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CSI004: new assessment visualization 9 + information on B(a)P and SO 2 + graphs with the 10 th and 90 th percentiles and the average of: a)The PM 2.5 annual mean concentrations. b)The P90.4 of the daily PM 10 concentrations c)The P93.2 of the maximum daily 8 hours mean O 3 concentrations d)The NO 2 annual mean concentrations

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Thank you!! Alberto.Gonzalez@eea.europa.eu http://www.eea.europa.eu/themes/air