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Nitrogen Dioxide: Pollution Control

Asked by Tim FarronLiberal DemocratDepartment for Environment, Food and Rural AffairsTabled Answered 1 April 2025UIN 41412

The question

To ask the Secretary of State for Environment, Food and Rural Affairs, whether concentrations of nitrogen dioxide are allowed to exceed the annual mean limit value once achieved throughout a zone or agglomeration.

Answered by Emma Hardy

Under the Air Quality Standards Regulations (2010), there is a requirement to meet annual mean limit values for nitrogen dioxide (NO2) of 40μg/m3. This is an ongoing requirement and does not expire once the limit value has been met in a single reporting year.

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