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The 1999 cryptosporidium risk assessment exercise in England and Wales : a groundwater overview

By B. Morris and J. Cunningham

Abstract

Regulations Introduced in 1999 obliged water companies In England and Wales to conduct risk assessments of their treatment works to establish whether there was a significant risk from Cryptosporidium oocysts in the water supplied. More than 330 treatment works were identified as being at risk, just over half of which were plants treating groundwater. This paper provides an overview of what water companies themselves identified as the most at-risk settings for their groundwater-based works in terms of aquifer and type of supply. Evaluation of results from the subsequent continuous monitoring regulatory regime that came into force on many of these supplies could validate the primarily qualitative nature of the initial assessments of at-risk settings. There would also be public health benefits from confirmation of whether currently-employed risk assessment methods are well-founded because similar procedures could then be applied with confidence to the many small private supplies In Britain.\ud \u

Publisher: Wiley
Year: 2005
DOI identifier: 10.1111/j.1747-6593.2005.tb01592.x
OAI identifier: oai:nora.nerc.ac.uk:15703
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