31Drinking water safety plans

1. A drinking water safety plan must—

2. be proportionate to the scale and complexity of, and the risks that relate to, the drinking water supply; and
3. identify any hazards that relate to the drinking water supply, including emerging or potential hazards; and
4. assess any risks that are associated with those hazards; and
5. identify how those risks will be managed, controlled, or eliminated to ensure that drinking water is safe and complies with legislative requirements; and
6. identify how the drinking water safety plan will be reviewed on an ongoing basis, and how its implementation will be amended, if necessary, to ensure that drinking water is safe and complies with legislative requirements; and
7. identify how the drinking water supply will be monitored to ensure that drinking water is safe and complies with legislative requirements; and
8. include procedures to verify that the drinking water safety plan is working effectively; and
9. include a multi-barrier approach to drinking water safety that will be implemented as part of the plan; and
10. include a source water risk management plan if required by section 43; and
11. where a drinking water supply includes reticulation, require, and provide for the use of, residual disinfection in the supply unless an exemption is obtained under section 58; and
12. identify how a supplier will meet the supplier’s duty under section 25 to ensure that a sufficient quantity of drinking water is provided to each point of supply; and
13. identify how a supplier will respond to events and emergencies; and
14. comply with any requirements set out in compliance rules.

15. A multi-barrier approach to drinking water safety is one that the Water Services Authority considers will—

16. prevent hazards from entering the raw water; and
17. remove particles, pathogens, and chemical and radiological hazards from the water; and
18. kill or inactivate pathogens in the water; and
19. maintain the quality of water in the reticulation system.