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We produce evidence reviews based on our assessments of needs and gaps in evidence-based environmental health practice and policy. We also work with researchers and environmental public health students for reviews. These documents are peer-reviewed and the content is the responsibility of the authors.
Community Water Fluoridation in Canada – Trends, Benefits, and Risks (University of Guelph Master of Public Health Program)
Fluoride has been added to public drinking water in Canadian communities since the 1940s as a means of preventing tooth decay. Dental fluorosis is a known adverse effect of excessive fluoride exposure during tooth formation. Fluorosis ranges from barely noticeable whitish striations in the enamel to severe pitting and brownish staining. In general, the...
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Microbial contamination of groundwater from private wells can pose a significant health risk to rural Canadians. To mitigate risk, Health Canada currently recommends shock chlorination along with microbial well testing, voluntary measures most often performed by the homeowner. However, infrequent testing and paucity of research assessing the effectiveness of shock chlorination guidance as...
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Characteristics of small residential and commercial water systems that influence their likelihood of being on drinking water advisories in rural British Columbia, Canada
Health officials often lack information about characteristics that predict which water systems are most likely to be placed on and to persist on drinking water advisories (e.g. health warnings offering advice or information). This study uses data collected by the Interior Health Authority in British Columbia to characterize water systems on advisory for microbiological threats and to identify the...View Full Article
Information about Canadian drinking water systems and past water-borne disease outbreaks is incomplete and non-standardized. Standard definitions and coordinated surveillance systems for water-borne disease outbreaks would help inform policy and practice. A relatively high proportion of past water-borne disease outbreaks in Canada are estimated to have occurred in small drinking water systems...View Full Article
Nanotechnology is the creation of materials, devices, and systems by controlling matter at the nanometer scale (1-100 billionths of a meter). Potential exposures to engineered nanoparticles (ENPs) through contact with consumer products or air, water, and food sources are an emerging potential threat to human health. ENPs have unique properties and characteristics in addition to size, such as a...View Full Article
Waterborne infections are an important cause of preventable enteric disease. This report obtained information on: characteristics of waterborne disease events (WBEs) in Canada; factors contributing to WBEs; current WBE detection and prevention practices; and, information needs of front-line public health staff.Forty-seven WBEs were identified, the majority occurring prior to 2001. Giardia and...View Full Article
The challenge of judging and managing public health risks “caused by” chlorination disinfection by-products (DBPs) in drinking water is likely the most complex issue faced by the drinking water industry in the developed world over the past three decades. Public health professionals must be sure that precautionary efforts in managing DBP risks are never allowed to compromise necessary...View Full Article
While boiling water is an effective way to kill most microbial pathogens, research performed in the United Kingdom has shown that people do not necessarily comply with boil water advisories. Similarly, in Walkerton, Ontario in 2000, only 44% of respondents reported that they were aware of the order to boil water when it was first issued on the local radio at the start of the outbreak and in...View Full Article