Cold winter makes for high aluminum levels in Ottawa’s water
Ottawa Citizen

By David Reevely, Ottawa Citizen, January 28, 2015

The very cold water coming into Ottawa’s treatment plants in winter forces the city to use more aluminum than usual to clean it, leaving nearly three times as much of the metal in city water as national standards ordinarily allow. That’s not a problem, says the city’s general manager of environmental services, because Health Canada guidelines say it’s OK to average out aluminum measurements over a year. Treating warmer water in summer requires a lot less of the stuff. via Cold winter makes for high aluminum levels in Ottawa’s water | Ottawa Citizen.

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