Department of Health Care and Epidemiology, Faculty of Medicine, University of British Columbia, James Mather Building, 5804 Fairview Avenue, Vancouver, BC V6T 1Z3. cvnetten@interchange.ubc.ca
Questions regarding control over a water fluoridation system in a British Columbia (BC) community led to a drinking water management survey in 1997-98.
A questionnaire was constructed based on published drinking water control and management criteria and was sent to 91 communities.
73/91 surveys were returned (80% response rate); 31 reported a protected water supply system, 40 reported logging and/or cattle grazing in watershed areas, 25 reported a lack of primary disinfection. Water fluoridation was reported in 12 locations, 3 of which did not monitor fluoride levels. Testing for protozoans was done routinely in 19 locations, 15 using approved laboratories. 15 water contamination events were reported, 9 of biological origin. Statistically significant associations were found between contamination events and: wooden delivery systems, lack of primary chlorination, increased number of protozoan tests, and increased number of personnel.
At the time of the survey in British Columbia, a number of communities were vulnerable to preventable drinking water contamination.
Notes
Comment In: Can J Public Health. 2002 Jan-Feb;93(1):10-211925692