(b)
Directive (EU) 2024/2881 of the European Parliament and of the Council of 23 October 2024 on ambient air quality and cleaner air for Europe (recast) · European Union
in general, the sampling point inlet shall be between 0,5 m (the breathing zone) and 4 m above the ground; higher siting may also be appropriate if the sampling point is located in a background location; the decision to apply such higher siting shall be fully documented;
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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.