# The Water Supply (Water Fittings) Regulations 1999, Paragraph: Fluid category 2


Water in fluid category 1 whose aesthetic quality is impaired owing to–
(a) a change in its temperature, or
(b) the presence of substances or organisms causing a change in its taste, odour or appearance,
including water in a hot water distribution system.

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Source: https://www.legislation.gov.uk/uksi/1999/1148/schedule/1/paragraph/wrapper2n1 (the official version)
Page: https://openlegislation.uk/water-supply-water-fittings-regulations-1999/schedule-1/paragraph-wrapper2n1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.