# The Air Quality Limit Values (Wales) Regulations 2001, Part IV: LEAD


Averaging Period
Limit value
Margin of tolerance
Date by which limit value is to be met
Annualr limit value for the protection of human health
Calendar year
0.5μg/m3 PM10
100% on 19 July 1999, reducing on 1 January 2001 and every 12 months thereafter by equal annual percentages to reach 0% by 1 January 2005
1 January 2005

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Source: https://www.legislation.gov.uk/wsi/2001/2683/schedule/1/part/IV (the official version)
Page: https://openlegislation.uk/air-quality-limit-values-wales-regulations-2001/schedule-1/part-IV
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.