In Europe, ambient concentrations of PM10 have been monitored in some urban networks since 1990, but there is currently no coherent overall European PM10 data set, mainly because PM10 has only been systematically monitored in a few member states. In addition, there is, as yet, no standardised method for monitoring PM10 across Europe, although standardisation of PM10 measurement methods is under development (cf. CEN/TC 264/WG6). Previous studies and the data collected by the Working Group from Member States indicate that, though there does not appear to be a consistent pattern of concentrations between site types (urban background, traffic and industrial), the urban data do show a reasonably.
