Nitrogen Dioxide: Pollution Control
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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