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Public Water Supply Distribution Systems Assessing and Reducing Risks: First Report (2005) / Chapter Skim
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1 Introduction
Pages 1-3

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From page 1...
... , the Surface Water Treatment Rule (SWTR) , which addresses the minimum required detectable disinfectant residual and the maximum allowed heterotrophic bacterial plate count, and the Total Coliform Rule.
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From page 2...
... Furthermore, in 2003 EPA committed to revising the TCR -- not only to consider updating the provisions about the frequency and location of monitoring, follow-up monitoring after total coliform positive samples, and the basis of the MCL, but also to consider addressing the broader issue of whether the TCR could be revised to encompass "distribution system integrity." That is, EPA is exploring the possibility of revising the TCR to provide a comprehensive approach for addressing water quality in the distribution system environment. To aid in this process, EPA requested the input of the National Academies' Water Science and Technology Board, which was asked to conduct a study of water quality issues associated with public water supply distribution systems and their potential risks to consumers.
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From page 3...
... 4 -- Identify advances in detection, monitoring and modeling, analytical methods, information needs and technologies, research and development opportunities, and communication strategies that will enable the water supply industry and other stakeholders to further reduce risks associated with public water supply distribu tion systems. This first report relates the committee's progress on Tasks 1 and 2 -- that is, trends relevant to the deterioration of distribution system water quality and the issues that the committee thinks are the highest priorities for consideration during TCR revision to encompass distribution system integrity.
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Key Terms

  • public water
  • water supply
  • water supplies
  • total coliform
  • supply distribution

  • drinking water
  • risks posed
  • deteriorating events
  • surface water
  • trends relevant

  • coliform rule
  • development opportunities
  • chemical contaminants
  • supply distribu
  • commercial customers

  • bacterial plate
  • outbreak surveillance
  • technique requirements
  • specific aspects
  • treatment rule

  • water science
  • addressing water
  • water samples
  • waterborne illnesses
  • microbial growth

  • treatment technique
  • positive sample
  • replacement represent
  • epa evaluate
  • evaluate dif


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