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The Air Quality Standards Regulations 2007

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This is the original version (as it was originally made).

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1.  This Part sets out the minimum number of sampling points for fixed measurement of Group A pollutants to assess compliance with limit values for the protection of human health and alert thresholds in zones where fixed measurement is the sole source of information.

Diffuse sources

Population of zone (thousands)Where concentrations exceed the upper assessment threshold(1)Where maximum concentrations are between the upper and lower assessment thresholdsFor nitrogen dioxide and sulphur dioxide in agglomerations where maximum concentrations are below the lower assessment thresholds
(1)

For NO2 and PM10 to include at least one urban-background station and one traffic-orientated station; this requirement shall also apply to benzene and carbon monoxide provided that it does not increase the number of sampling points.

0–249111
250–499211
500–749211
750–999311
1,000–1,499421
1,500–1,999521
2,000–2,749632
2,750–3,749732
3,750–4,749842
4,750–5,999942
6,000 or more1053

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