Abstract
The Surface Water Treatment Rule (SWTR) sets disinfection standards for water systems that use filtration. The new standards take effect in June 1993. In many states, water systems (even small systems) have been required to filter when starting to use surface water. The SWTR places additional requirements on these systems. Together with new filter performance standards, implementation of the disinfection standards prevent harmful, disease‐causing organisms from entering the water distribution system. This is one in a series of five articles about the Surface Water Treatment Rule. Other articles discuss “Surface Water Treatment Rule Targets Microbials” (May 1993); “SWTR – C x T Values Indicate Disinfection Applied” (July 1993); “Configuration, Operation of System Affects C x T Values” (August 1993); and “SWTR Conditions to Avoid Filtration Are Demanding (September 1993).
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