# The Air Quality Standards (Wales) Regulations 2007, Regulation 5: Zones and agglomerations


(1) The National Assembly must, for the purposes of this Part, divide the territory of Wales into zones.
(2) A zone is to be classified as an agglomeration for the purposes of this Part where—
(a) it comprises a population in excess of 250,000 inhabitants; or
(b) in any other case, it has a population density per km2 for which the National Assembly considers that such a classification is justified.
(3) The National Assembly may establish different zones for different pollutants where it considers it appropriate.

---
Source: https://www.legislation.gov.uk/wsi/2007/717/regulation/5 (the official version)
Page: https://openlegislation.uk/air-quality-standards-wales-regulations-2007/regulation-5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.