The Air Quality Standards (Wales) Regulations 2007 No. 717 (W. 63)

PART 3 Other pollutants and background monitoring

Measurement of PM_2·5

17.—(1) The National Assembly must, in accordance with paragraph (2), install and operate measuring stations to supply representative data on concentrations of PM_2·5.

(2) For the purpose of paragraph (1), the National Assembly must—

(a) choose the number of measuring stations it considers necessary;

(b) insofar as possible, co-locate the measuring stations with any sampling points established for PM₁₀ in accordance with regulation 15(1), or

(ii) in any other case, locate the measuring stations in accordance with the principles set out in Parts 1, 4 and 5 of Schedule 5 as they apply to PM₁₀;

(c) use reference methods for sampling and measurement that it considers suitable; and

(d) have regard to the data quality objectives set out in Part 1 of Schedule 8.