DWI strongly encouraged water companies to develop Drinking Water Safety Plans (DWSPs), particularly in relation to microbiological quality of drinking water. Key features of the approach were risk assessment and management, and documentation to support good operational practices from source to tap.
Disinfection is the main microbiological barrier required by DWI for all waters, but there is little comprehensive guidance available on establishing and maintaining good disinfection practice under UK conditions. The UK IWA Disinfection Group, with DWI membership, has identified the need for best practice guidance on disinfection, to reduce operating costs, improve understanding and help develop DWSPs. The proposed work developed such guidance for the purposes of risk assessment and mitigation, as well as provide recommendations for data management and handling to demonstrate the operational security of specific supply systems. It also provided simple software to evaluate existing or proposed practices against agreed best practice.
The IWA Disinfection Group was involved in the project, providing expert review to support the client liaison group.
Benefits to Clients
- Improve security of disinfection, with reduced risk of failures and their associated costs.
- Develop DWSPs in a consistent manner at lower cost.
- Optimise disinfectant use and reduce costs without increasing risk.