Update of EEA´s Core Set Indicator th EIONET Workshop on Air Quality Bern, 30 th September 2014 Alberto González Ortiz Project Manager – AQ data and policy assessments European Environment Agency

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

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

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

CSI004: current methodology 5 X X X Background average

CSI004: proposed methodology 6

= each each

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

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

Thank you!!