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What is the current Canadian drinking water guideline for THMs?

April 26, 2017Canadian drinking water guideline thms

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What is the current Canadian drinking water guideline for THMs?

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The current Canadian drinking water quality guideline for THMs is 100 parts per billion (ppb) or micrograms per litre (µg/l). The guideline is based on an annual running average of quarterly samples to account for seasonal variations. THM levels are generally highest in the summer and lowest in the winter.