UK: Cryptosporidium

United Kingdom
24/11/1999
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Since 1 October 1999, water undertakers are required by legislation to carry out a risk assessment for each of their treatment works to establish whether there is a significant risk from cryptosporidium oocysts in water supplied from the works and a copy of the assessment be submitted to the Secretary of State. “The Water Supply (Water Quality) (Amendment) Regulations 1999 (SI 1999 No. 1524) came into force on 30th June 1999 and the DWI have published a Standard Operating Protocol for the monitoring of cryptosporidium oocysts in treated water supplies to satisfy the Regulations. These are published in four parts, together with guidance on assessing the risk from cryptosporidium oocysts. Where it is established that there is such a risk, the relevant water undertakers must use a process for treating the water to ensure that the average number of oocysts per 10 litres of water is less than 1. To verify compliance for this requirement, water undertakers must ensure that the water leaving their treatment works is continuously sampled for oocysts.
(SO, July 1999, DWI July 1999)

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