PART 2 Annual Mean Concentration Target for PM2.5

Measurement
5. (1) The annual mean concentration target is met by 31st December 2040 if, at every relevant monitoring station, the annual mean level of PM2.5 in ambient air, calculated in accordance with regulation 15 and rounded to the nearest whole number of µg/m³, is equal to or less than the target level in the year 2040.
(2) In paragraph (1), “relevant monitoring station” means a monitoring station from which fixed measurements of PM2.5 are taken—
(a) throughout the whole of the year 2040, disregarding any periods during that year in which the monitoring station is temporarily out of operation, for example for repair or maintenance; and
(b) which meet the minimum annual data capture requirement in that year.