# The Water Supply (Water Quality) Regulations 2018, Paragraph


Annual sampling frequencies for Group A4 parameters: water supply zones

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Source: https://www.legislation.gov.uk/wsi/2018/647/schedule/3/part/2/paragraph/wrapper2n1 (the official version)
Page: https://openlegislation.uk/water-supply-water-quality-regulations-2018/schedule-3/part-2/paragraph-wrapper2n1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.