Written Question·Department for Environment, Food and Rural Affairs·UIN 14685

Chlorine: Health Hazards

Tabled: 30 June 2026
Answered: 8 July 2026

Question

Gregory Stafford

ConservativeFarnham and Bordon

To ask the Secretary of State for Environment, Food and Rural Affairs, whether water companies are required to retain records of chlorine residual measurements taken at individual domestic properties.

Answer

Emma Hardy
Water companies are required to monitor for chlorine as set out in Schedule 3 of The Water Supply (Water Quality) Regulations 2016. Chlorine residual measurements are part of companies’ routine compliance sampling programmes and are recorded and submitted...

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