The UK Cryptosporidium Regulation requires Water Utilities to carry out risk assessments to identify water treatment sites which are "at risk" from Cryptosporidium and continuously monitor for Cryptosporidium in the final water.
Utilities can reassess the risks, and apply for the Regulator, the Drinking Water Inspectorate (DWI), to have sites removed from the "at risk" category if risk factors change.
This work has developed criteria for this reassessment, based on water quality and treatment performance, Cryptosporidium monitoring data, and incidence of cryptosporidiosis. The research has been carried out for UK Water Industry Research UKWIR) collaboratively with Public Health Laboratory Services (PHLS) and WRc.
Removal of sites from the "at risk" category will:
- Avoid the cost for continuous Regulatory Cryptosporidium monitoring
- Avoid the need to install additional plant to remove Cryptosporidium.