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Comparative evaluation of risk management frameworks for U.S. source waters.

Karen Setty1, Robert McConnell2, Robert Raucher3

  • 1The Water Institute Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina at Chapel Hill Chapel Hill North Carolina.

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|April 20, 2019
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A new study recommends combining the ANSI/AWWA G300 standard and WHO Water Safety Plan guidance for comprehensive U.S. surface water risk management. This approach integrates financial considerations for better source water protection.

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Area of Science:

  • Environmental Science
  • Water Resource Management
  • Public Health

Background:

  • The Safe Drinking Water Act mandates source water assessments, but comprehensive risk management for surface water is underutilized.
  • Effective prioritization and management of contamination risks for public water supplies remain a challenge.

Purpose of the Study:

  • To identify optimal risk management frameworks for U.S. water utilities.
  • To assess the applicability of various risk management tools for surface water supplies.

Main Methods:

  • A literature review and interviews with external utilities were conducted.
  • Qualitative data informed the evaluation of 24 framework criteria across five categories.
  • Stakeholder input was used for weighted integration and ranking, validated in a workshop.

Main Results:

  • A hybrid approach combining the American National Standards Institute/American Water Works Association (ANSI/AWWA G300) standard and World Health Organization Water Safety Plan guidance emerged as most applicable.
  • Incorporating cost-benefit analysis from other frameworks was recommended for financial decision-making.

Conclusions:

  • The recommended hybridized framework offers a comprehensive strategy for U.S. source water protection.
  • Integrating financial analysis enhances the practical application of risk management for utilities.