On June 2, 2012, O. Reg. 98/12 was enacted. This regulation exempts the use, operation, construction, alteration, extension and replacement of ground source heat pumps from the requirement to obtain environmental compliance approval under section 9 of the Environmental Protection Act. In general, section 9 requires an approval for the construction and operation of all equipment that discharges contaminants into the natural environment other than water.
For further information, please see O. Reg. 98/12.