There are several ways to effectively dissipate chlorine out of tap water. I'm not sure where you are going with this thread so let's discuss municipal tap water quality in general. The Environmental Protection Agency sets federal drinking water standards. States must meet or exceed those standards. Municipalities that pump ground water from wells usually only use free chlorine; i.e. water that has been treated with chlorine to oxidize all contaminants including ammonia. The chlorine residual is usually dosed at .5 (1/2 part per millions parts) ppm up to 1 part per million parts (ppm). Free chlorine is dosed at this rate to oxidize or eliminate bacterias and viruses that may enter the potable water distribution system. Free chlorine at that dosage rate will dissipate rapidly when water is drawn and left to atmosphere say in a 5 gallon bucket for 24 hours.
Chloramines are defined as water that has been treated with chlorine but bind with ammonia (mono chlorides, dichlorides and trichlorides). In some water treatment plants, water is treated to the free chlorine state (break point) where all ammonia has been oxized, then a small amount of ammonia is added back into the water to achieve chloramination. Chloramines are a weaker disinfectant but will stay in the distribution system longer without dissipating. Thus, chloramine residual dosage is typically 1.5 ppm to 2.0 ppm. Chloramines will kill pet fish and must be filtered out of tap water when used for aquariums or fish ponds.
Chemicals used to dechlorinate tap water include sodium thiosulfate and vitamin C. Sodium thiosulfate is very toxic and should be used in very small doses to dissipate chlorine residuals in water.
Obviously, there are literally thousands of textbook pages that would cover water treatment in detail. The intent of this post was to extract a small amount of that information to answer your question/concern about removing chlorine from your water. I'm curious to know more about why you want to remove the chlorine with a chemical product with respect to cannabis cultivation.
Best,
Mr.Greengenes