# The Water Supply (Water Quality) Regulations 2000, Regulation 3: Water supply zones


(1) Before the beginning of each year in which it intends to supply water for regulation 4(1) purposes, a water undertaker shall designate the names and areas within its area of supply that are to be its water supply zones for that year.
(2) A water supply zone may not comprise an area whose population immediately before the beginning of the year in question is estimated by the water undertaker to exceed 100,000.
(3) A water undertaker may not vary a designation under paragraph (1) after the beginning of the year in relation to which the designation has effect.

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Source: https://www.legislation.gov.uk/uksi/2000/3184/regulation/3 (the official version)
Page: https://openlegislation.uk/water-supply-water-quality-regulations-2000/regulation-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.