Hi Jasonc, I have worked in the water treatment field for 40 years. One of the new treatments is taking salt water and disinfecting water by ion exchange and taking the Cl out of the salt as a natural element (salt = Sodium Chloride NaCl ) Gas Chlorine is produced in 3 different ways and produces several other chemicals like HTH, H2. Caustic Soda (NaOH). Almost every Chemical by product can be removed from treated drinking water by carbon filtration. You can buy them at Home Depot or Lowe's. I do not like the use of Fluoride. It was used in rat poison and it can accumulates in the body. The best, but most expensive disinfectant for water is ultra-violet light, but does not carry a residual like Cl2 does (Chlorine)...But without Chlorine in drinking water, water born disease would run rampant.