Water sanitation hygiene

Risk assessment of Cryptosporidium in drinking water

Publication details

Number of pages: 134
Publication date: 2009
Languages: English
WHO reference number: WHO/HSE/WSH/09.04



As a waterborne pathogen of significant concern, Cryptosporidium is considered a key reference pathogen in the Guidelines for drinking-water quality (GDWQ). This text complements and supports the GDWQ by providing further data on Cryptosporidium in order to assist country authorities in setting health-based targets and water suppliers in determining required performance of water treatment processes as part of a system-specific Water Safety Plan. For example, where data is scarce, default source water concentrations and default log-credits for control processes have been deduced.