Q-2, r. 40 - Regulation respecting the quality of drinking water

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8. When a provision of this Regulation requires that water undergo a disinfection treatment, that treatment must be administered in a way that ensures, at the outlet of the treatment facility, a residual disinfectant content at least equal to the highest of the concentrations provided for in the following subparagraphs:
(1)  a concentration of free residual chlorine of 0.3 mg/L or a concentration of chloramines of 1 mg/L, depending which disinfectant is used; or
(2)  a concentration of residual disinfectant that makes it possible to reach a pathogenic microorganism elimination effectiveness at least equal to the elimination percentage provided for in section 5, 5.1 or 6.
This section does not apply to the addition of disinfectant in the distribution facility or to a distribution system that supplies only one building.
O.C. 647-2001, s. 8; O.C. 467-2005, s. 8; O.C. 70-2012, s. 9.