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The Private Water Supplies (Wales) Regulations 2017

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Use of products or substances in private water supplies and disinfection arrangements

5.—(1) Any product or substance used in the preparation or distribution of a private water supply, or impurities associated with such products or substances, must not be present in water at the point of use at levels that would make it unwholesome or constitute a potential danger to human health.

(2) Where disinfection forms part of the preparation or distribution of water, the relevant person must—

(a)design, operate and maintain the disinfection process so as to keep the presence of disinfection by-products as low as possible without compromising the effectiveness of the disinfection process;

(b)ensure that the effectiveness of the disinfection process is maintained;

(c)keep records of the maintenance and monitoring which have been undertaken in order to verify the effectiveness of the disinfection process; and

(d)keep copies of those records available for inspection by the local authority, for a period of 5 years.

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