Q-2, r. 39 - Regulation respecting water quality in swimming pools and other artificial pools
6. If the pool water temperature exceeds 35 °C, the standards in section 5 apply, except the standards for chlorine, bromine and ORP which are the following:
Free chlorine 2.0 to 3.0 mg/l
Total bromine 3.0 to 5.0 mg/l
If equipment for measuring oxidation-reduction potential (ORP) is used, the value measured must be greater than 750 mV.