Why not change to disinfection methods that don create DBPs?
All chemical disinfectants have byproducts. Public health regulations require that water be disinfected at the treatment plant and that some disinfectant remain with the water until it arrives at your taps. Some utilities have adopted non-chemical disinfection methods, such as ultraviolet light. Not only is this method very expensive both to install and maintain, but it does not solve the problem of disinfecting the water after it leaves the plant. Utilities with ultraviolet systems add small amounts of disinfectant to the water as a final treatment step before release, so the problem of byproducts is not eliminated, though it may be reduced.
