{"id":7290,"date":"2020-04-03T22:14:04","date_gmt":"2020-04-03T17:14:04","guid":{"rendered":"http:\/\/www.cawater-info.net\/all_about_water\/en\/?p=7290"},"modified":"2020-04-03T22:14:04","modified_gmt":"2020-04-03T17:14:04","slug":"finding-a-fix-for-newfoundlands-troubled-drinking-water","status":"publish","type":"post","link":"http:\/\/www.cawater-info.net\/all_about_water\/en\/?p=7290","title":{"rendered":"Finding a fix for Newfoundland\u2019s troubled drinking water"},"content":{"rendered":"

Nothing better symbolizes the state of a community\u2019s public health than the availability of clean and safe water. Yet recent water quality tests in Newfoundland and Labrador\u00a0have found high levels of disinfection byproducts in the drinking water of 119 communities.<\/em><\/p>\n

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Unfortunately, these are not new concerns. CBC first drew attention to the issue of\u00a0chlorine and disinfection byproducts in the municipal drinking water in 1999. The number of affected communities has since doubled.<\/p>\n

Chlorine has been used to disinfect drinking water and prevent waterborne disease since the early 1900s. It has been a great success, preventing millions of deaths and making potable water widely available at a low cost.<\/p>\n

Although federal and provincial agencies say\u00a0the benefits of chlorination outweigh the possible risks associated with disinfection by-products,\u00a0much of Europe has moved away\u00a0from disinfectants based on chlorine and other similar chemicals for\u00a0health reasons.<\/p>\n

Canada has the opportunity to adopt a similarly pragmatic approach.<\/p>\n

Health risks?<\/h2>\n

Regulated drinking water systems, including municipal utilities, require a minimum level of treatment. Many water utilities add chlorine twice during treatment. Primary disinfection kills the pathogens found in untreated, raw water drawn from rivers, lakes and other sources. Secondary disinfection maintains drinking water quality within the distribution system.<\/p>\n

However, when disinfectants such as chlorine come into contact with naturally occurring organic matter, including algae, bacteria, soil, decomposed plant material or animal feces, they form compounds called disinfection byproducts, including\u00a0trihalomethanes (THMs) and halogenic acetic acids (HAAs).<\/p>\n

Long-term exposure to disinfection byproducts is associated with\u00a0an increased risk of bladder cancer.\u00a0Asthma and other breathing issues\u00a0have also been linked to exposure to disinfection byproducts in swimming pools.<\/p>\n

Many of the communities in Newfoundland and Labrador are remote, and their drinking water is often sourced from ponds and rivers with high levels of natural organic matter and delivered over long distances. Newfoundland surface water is also heavily influenced by extreme and variable weather, creating optimal conditions for the formation of disinfection byproducts.<\/p>\n

A Canada-wide problem<\/h2>\n

Newfoundland and Labrador Municipal Affairs and Environment Minister Graham Letto has said that municipalities should\u00a0inform residents when THM levels exceed the Health Canada standard\u00a0of 100 milligrams per litre and take measures to correct the problem.<\/p>\n

For example, residents can install NSF-certified filters in water pitchers or under the sink to reduce the disinfection byproducts, or\u00a0they can boil their water or leave it in an open container\u00a0in a refrigerator overnight. But these can\u2019t remove all the disinfection byproducts or prevent exposure to them when swimming, showering or bathing.<\/p>\n

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Frequent swimming in swimming pools disinfected with chlorine may increase the risk of asthma and some allergies.<\/p><\/div>\n

An alternative approach is to use carbon or membranes to filter the organic matter from the water before chlorination. Many municipalities do this, but it does require a large capital investment and well-trained operators and engineers for ongoing maintenance. This may not be practical for small communities, nor does it eliminate the use of chlorine.<\/p>\n

The pathway to safer water<\/h2>\n

There are other disinfectants available including ozone, chloramines, chlorine dioxide and ultraviolet (UV) light. While these may lower or eliminate the production of disinfection byproducts, some don\u2019t provide enough protection from pathogens along the distribution system, must be produced on site, are expensive or form other undesirable byproducts.<\/p>\n

But the pathway to safer water is already in place in Newfoundland and Labrador.\u00a0A series of pilot projects\u00a0tested the\u00a0SanEcoTec AVIVE water treatment system in several municipalities in Newfoundland and Ontario. Instead of chlorine, the system uses a form of hydrogen peroxide combined with silver to provide disinfection with\u00a0fewer harmful disinfection byproducts as well as better water colour and smell. (Disclosure: I have received research support from SanEcoTec.)<\/p>\n

Within two weeks of use, this hydrogen-peroxide water-treatment system met or exceeded disinfection standards, and disinfection byproduct levels were within Health Canada guidelines. The benefit comes from eliminating chlorine from the disinfection process.<\/p>\n

It can be used in pools, and no disinfection byproducts with any environmental or health impacts have been identified. This approach also produces water that is less corrosive, resulting in fewer heavy metals leaking from piping into the water system, and may extend the useful life of community water infrastructure.<\/p>\n

All of this research points to an alternative approach for water treatment that is more robust, effective and healthy. This system can replace the one that has produced crisis conditions for residents of Newfoundland and Labrador and is burdening public health and infrastructure.<\/p>\n

Municipalities hesitate to adopt alternative disinfection strategies due their lack of understanding and unwillingness to change. In part, this is due to perceptions the alternative approach is more costly and\/or complex. But making the switch could have important public health and economic outcomes.<\/p>\n

Source: https:\/\/theconversation.com\/<\/a><\/p>\n

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