– Yes, chlorine in your water can be safe, but it all depends on the concentration level. The United Stated Environmental Protection Agency explains, “some household cleaners contain two percent (2%) chlorine. Bleach has five percent (5%). Chemicals for use in swimming pools can contain from 12 to 95 percent (12% to 95%) chlorine. Why so strong? Because the chemicals are meant to be diluted or added to water, lots of water, before they are safe to use.” While you don’t necessarily need to worry about chlorine in your pool water, you should always check the chemical levels to make sure it is a healthy and safe reading for you and your kids.