Jurisdiction(s):
United Kingdom

Related legal acts

Key definition

Air Quality definition

What does Air Quality mean? In legal practice, air quality describes the condition of the air at or around a location, especially whether concentrations of pollutants comply with applicable standards and objectives. It concerns ambient (outdoor) air and is assessed through monitoring and modelling of pollutants such as nitrogen dioxide (NO2), particulate matter (PM10 and PM2.5), sulphur dioxide, ozone, smoke, dust and smog. The expression is descriptive; legislation defines related concepts (including ambient air, limit/target values, air quality objectives and Air Quality Management Areas). In the UK, pollutant limits are set under the Air Quality Standards Regulations (separate instruments for England, Scotland, Wales and Northern...

Air Quality and Planning Law in England and Wales: Statutory Duties, Policy, AQMAs, EIP 2025, Assessment, Mitigation and Key Cases

Published by a LexisNexis Planning expert

Practice notes

Both central government and local authorities treat air quality as a priority. EU Directive 2008/50/EC of the European Parliament and of the Council of 21 May 2008, on ambient air quality and cleaner air for Europe (the Directive) — in the form it had immediately before 11pm on 31 December 2020 — set legally binding limits on concentrations of key air pollutants that affect public health, habitats and biodiversity. The Air Quality Standards Regulations 2010 and the Air Quality Standards (Wales) Regulations 2010 (together, the Air Quality Regulations) transpose the requirements of the Directive into English and Welsh law respectively and, post-Brexit, still oblige the Secretary of State/Welsh Ministers to assess air quality, ensure that specified limit values are not exceeded, and that specified target values are achieved. In addition, under Part IV of the Environment Act 1995 (EA 1995), local authorities must review air quality in their areas and declare air quality management areas (AQMAs) where any relevant standards or objectives are not being met, or are unlikely to be met...

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Web page updated on 21/05/2026

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