Written Question·Department for Environment, Food and Rural Affairs·UIN 41412

Nitrogen Dioxide: Pollution Control

Tabled: 26 March 2025

Answered: 1 April 2025

Question

Tim Farron

Liberal Democrat — Westmorland and Lonsdale

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.

Answer

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 y...

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