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The Air Quality Limit Values Regulations 2003
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- 2003 No. 2121
- SCHEDULE 5
- PART III
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PART IIIOzone: 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
| Population (× 1,000) | Agglomerations (urban and suburban) (a) | Other zones (suburban and rural) (a) | 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 in England (b) | |
| 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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