# The Air Quality (Ozone) Regulations (Northern Ireland) 2003, Part I: minimum number of sampling points for fixed continuous measurement to assess air quality in view of compliance with the target values, long-term objectives and information and alert thresholds where continuous measurement is the sole source of information

Extent: N.I.

Population (× 1,000)
Agglomerations (urban and suburban)
Other zones (suburban and rural)
Rural background
(a)at least 1 station in suburban areas, where the highest exposure of the population is likely to occur. In agglomerations, at least 50% of the stations should be located in suburban areas.
(b)1 station per 25,000 km2 for complex terrain is recommended.
0 – 250
1
1 station/50,000 km2 as an average density over all zones per country
251 – 500
1
2
501 – 1,000
2
2
1,001 – 1,500
3
3
1,501 – 2,000
3
4
2,001 – 2,750
4
5
2,751 – 3,750
5
6
>3,750
1 additional station per 2 million inhabitants
1 additional station per 2 million inhabitants

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Source: https://www.legislation.gov.uk/nisr/2003/240/schedule/3/part/I (the official version)
Page: https://openlegislation.uk/air-quality-ozone-regulations-northern-ireland-2003/schedule-3/part-I
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.