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Health threats linger from Alberta flooding

Canmore and High River among communities where boil-water advisories issued

Posted: Jun 26, 2013 1:48 PM ET

Last Updated: Jun 27, 2013 1:54 AM ET

People in southern Alberta communities where boil-water advisories have been issued face a threat of illness from microbes and parasites if they don't follow recommendations, health officials say.

Residents should boil all water used for drinking, preparing food, beverages, ice cubes, washing fruits and vegetables or brushing teeth, according to Health Canada's website.

Alberta Health Services lists boil-water orders for areas such as Canmore and High River.

Calgary does not have a boil-water advisory in place. The city's mandatory water restrictions against washing cars and watering lawns remain. People are asked to limit indoor water use, such as taking showers that last five minutes or less.

To kill disease-causing organisms, water should be brought to a rolling boil for one minute.

In general, Health Canada says public health officials or water utilities issue boil-water advisories when there are:

Water quality can be compromised by inadequate filtration or disinfection during treatment or recontamination in the distribution system.

An extra step that is sometimes advised is to wash hands in diluted, unscented bleach (one millilitre or 20 drops of unscented bleach per litre of water).

After the advisory or order is lifted, pipes need to be flushed and water heaters may need attention.

Guidelines for Canadian drinking water quality specify limits for disease-causing organisms and harmful chemical substances. Municipalities collect and analyze water samples to enforce the guidelines and inform the public of risks.

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Corrections and Clarifications

  • Calgary is no longer under a boil water advisory. Outdoor water use restrictions and limits on indoor use remain. June 26, 2013 | 4:47 p.m. ET

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