Hey Man, I am also in Peel but south of Brampton. The water in Peel does not use chlorine, it uses chloramine. Difference being if you leave chlorinated water out the chlorine will evaporate in a day or 2, chloramine does not. That is why many places use it now, it is more effective. The levels in our water should not hurt your plants any, it doesn't hurt mine. Get a PPM meter and figure out what your reading is, mine are reasonably low. There is calcium already in the tap water so go low on Calmag and possibly add some Epsom salts for Magnesium.