anx_I__para__9
The average exposure indicator (AEI) expressed in μg/m3 shall be based upon measurements at all sampling points in urban background locations in average exposure territorial units throughout the territory of a Member State. It shall be assessed as a 3-calendar-year running annual mean concentration averaged over all sampling points of the relevant pollutant established pursuant to Point B of Annex III in each average exposure territorial unit. The AEI for a particular year shall be the mean concentration of that same year and the preceding 2 years.
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Source: EUR-Lex (Cellar) · retrieved 2026-10-16 · Text as adopted (Official Journal); later amendments are not incorporated in this text.