Are fluoridated and chlorinated water harmful?
Top of Page It probably depends on how concentrated the chlorine is. Household bleach (Sodium hypochlorite) added to tap water until it’s identical with drinking water, which is injected with chlorine gas, doesn’t seem to harm most plants except violets. We do know that high concentrations of chlorine will show damage to geraniums, petunias, marigolds, and kalanchoes. Fortunately, it’s easy to avoid chlorine burn. Simply draw off a pail of water at night and let it stand until the next day. By that time, the chlorine gas will have disappeared.
