This purification process has been carried out using chlorine. In the 1970s, researchers found chlorine could react to organic compounds in water to produce chemical reactions that cause cancer ...

However, since rainwater, bacteria, and other byproducts introduced by swimmers and environmental factors affect the water's ...

Chlorine dioxide tablets can kill germs including cryptosporidium ... Most filters don’t remove viruses or bacteria, read and follow manufacturer instructions for the filter you’re using. After ...