# The Water Supply (Water Quality) Regulations 1989, Regulation 9: Application and interpretation


(1) This Part applies to water supplied for any of the purposes described in regulation 3(2) by a water undertaker in the performance of its duties under Chapter II.
(2) In this Part–
“corresponding number” means any relevant reduced or increased number shown in a Table as an alternative to the standard number; and
“the standard number” means such number specified in the column headed “Standard” in Tables 1 to 6 as is applicable to the parameter in question by reference to the number of persons estimated to have been supplied from the relevant water supply zone during the year preceding the year in question or, as the water undertaker may determine, by reference to the volume of water supplied for domestic purposes from that zone during that period: but a determination may not be varied after the beginning of the year for which it applies.

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Source: https://www.legislation.gov.uk/uksi/1989/1147/regulation/9 (the official version)
Page: https://openlegislation.uk/water-supply-water-quality-regulations-1989/regulation-9
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.