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Review of Guidelines for Shock Chlorination in Private Wells (UBC Bridge Program)

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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Understanding microbial indicators for drinking water assessment - revised

Boil water advisories are issued when water testing detects higher than accepted amounts of microbial indicators or when there are deficiencies with water treatment. The fear of not issuing a boil water advisory when there is truly a health risk associated with water consumption can lead water operators to call for boil water advisories as a precautionary measure. Yet, issuance of boil water...

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Cemetery Setback Distances to Prevent Surface Water Contamination

Primary inquiry: In Canada, as in many other countries, cemeteries are required to be setback a certain distance from waterbodies to protect drinking water sources from contaminated liquids that can arise from the decomposition of bodies after burial. What is recommended as a safe setback distance? What is the rationale for the setback distances used throughout Canada?

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Irrigating Food Crops with Water Containing Cyanobacteria Blooms

Primary inquiry: Small horticulture growers have been watering their crops with surface water containing a cyanobacterial bloom, before selling their crops at local markets. Can irrigation of food crops using surface water affected by cyanobacteria blooms result in bioaccumulation of cyanotoxins in these crops? Can cyanotoxins bioaccumulate to a concentration that might cause a public health...

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Identifying and Addressing the Public Health Risks of Splash Parks

Splash parks, also known as splash pads, spray parks, or wet decks, have gained in popularity over the last decade. These interactive parks are artificially created depressions or basins into which water is sprayed, splashed or poured onto visitors; water is not permitted to accumulate, but instead drains immediately out of the play area. Splash parks may take one of two basic designs, which...

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Cyanobacteria in Freshwater

What are cyanobacteria? Are cyanoblooms preventable? Who is at risk and how does exposure occur? Is there testing for cyanotoxins? This NCCEH document provides a brief outline of these key questions related to cyanobacteria and the toxins they produce.

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Float Tanks: Considerations for Environmental Public Health

Floatation refers to a meditative activity in which users float in a high-density Epsom salt solution in a dark, quiet environment. Because float tanks are distinct from swimming pools and other recreational water, questions have been raised regarding the need for and efficacy of various disinfection methods. Although direct evidence is lacking, pathogen kill assays and field studies from...

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Float Tanks: Review of Current Guidance and Considerations for Public Health Inspectors

The growing popularity of “floatation” and the ways in which this practice differs from the use of pools and spas have raised interesting questions in environmental public health. Public health agencies in the US and Canada have taken very different approaches to the classification and regulation (or non-regulation) of these facilities. Continuing engagement amongst environmental health...

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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 prevalence of dental fluorosis in...

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Water-borne Disease Outbreaks in Canadian Small Drinking Water Systems

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...

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Pool Chlorination and Closure Guidelines

As an EH director at a local health authority, helping to review provincial guidelines on swimming pools, you want to know if scientific evidence supports pool closure orders when free available chlorine (FAC) is found to be at or above 10 ppm. Should the level be different and are there other factors to be considered for closure, instead of or in addition to FAC? What is Free Available Chlorine...

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Workshops Presentations

Retrospective Investigation of Drinking Water-related Illnesses in Canada

Update on the NCCPH Small Drinking Water Systems Project

Update on the NCCPH Small Drinking Water Systems Project

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Event

NCCEH eJournal Club - Water Quality Survey of Splash Pads After a Waterborne Salmonellosis Outbreak

The NCCEH eJournal Club is a series of informal hour-long sessions discussing and appraising articles relating to environmental health. Active participation is encouraged. Although these sessions are directed at public health inspectors, anyone interested in a given topic is more than welcome to take part. Remote viewing instructions are available on the Eventbrite registration page. Title of...

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American Public Health Association (APHA) - Drinking Water and Lead Service Lines: Partnering to Protect Public Health

Lead exposure contributes to cognitive impairments, behavioral problems and lowered IQ. While there is no safe level of lead exposure, lead can be found in dust in our homes, air, soil, and drinking water. Lead service lines are the largest source of lead in drinking water - with an estimated 6-10 million lead service lines bringing water to taps across the U.S. Following the tragedy in Flint,...

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