An air quality assessment may be required when a proposed development could significantly affect local air quality or expose future occupants to pollution. Local planning authorities consider factors such as the development’s size, location, traffic generation, construction activities, and proximity to existing pollution sources. Assessments are particularly relevant for major developments, schemes near Air Quality Management Areas, and projects involving significant changes in traffic or emissions.
The required level of assessment should be proportionate to the potential impact and local planning requirements. Early consultation with the planning authority can help developers and planning consultants understand whether a detailed study is needed and what it should cover. A well-prepared assessment can identify potential impacts, recommend suitable mitigation measures, and support a smoother planning application process.
