# The Air Quality Standards Regulations 2010, Regulation 4: Zones and agglomerations


(1) The Secretary of State must, for the purposes of these Regulations, divide the territory of England into zones and agglomerations.
(2) A zone will be classified as an agglomeration if it is a conurbation with a population in excess of 250,000 inhabitants.
(3) In these Regulations references to a zone include a zone which has been classified as an agglomeration.
(4) Zones are identified on a map published by the Secretary of State in January 2010.

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Source: https://www.legislation.gov.uk/uksi/2010/1001/regulation/4 (the official version)
Page: https://openlegislation.uk/air-quality-standards-regulations-2010/regulation-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.