AWWA ACE56369

During the spring of 2001, the City of North Battleford, Saskatchewan, was subjected to an outbreak of gastrointestinal illness attributed to cryptosporidiosis. It was estimated that 5800 - 7100 people from the immediate area and a substantial number of visitors were affected. The outbreak was attributed to be waterborne. North Battleford has both a groundwater and a surface water system. The surface treatment facility developed a major problem in March 2001 with the coagulation/flocculation/ clarification process unit, and it was believed this was a major factor for probable entry of the parasite. A boil water order was imposed for a 13 week period. The provincial government called for a judicial inquiry into the matter. The report of the inquiry is due by the end of March 2002. This paper reviews the North Battleford system, the outbreak, and the attendant circumstances. Measures and issues associated with the boil water period are described as well as the improvements that have been implemented or are pending. Includes 5 references, figures.