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Drinking Water Utility-Level Understanding of Climate Change Effects to System Reliability.

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Drinking water utilities face climate change risks, but awareness and adaptation planning vary widely. Many utilities lack comprehensive plans, highlighting the need for targeted guidance on climate resilience.

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Area of Science:

  • Environmental science
  • Climate change adaptation
  • Water resource management

Background:

  • Climate change poses significant threats to drinking water infrastructure and reliability.
  • Understanding utility manager perceptions is crucial for effective adaptation planning.

Purpose of the Study:

  • Assess climate hazard concerns among drinking water managers.
  • Develop a framework for understanding utility-level climate risk perception.
  • Examine current water utility adaptation planning status.

Main Methods:

  • Conducted 60 semistructured interviews with diverse U.S. drinking water utilities.
  • Analyzed interview data to identify climate hazard concerns and adaptation strategies.
  • Developed a mental model framework for risk assessment.

Main Results:

  • Climate hazard awareness and concern are geographically variable and influenced by historical exposure.
  • Managers primarily focus on water supply and infrastructure impacts, neglecting operations, water quality, and business functions.
  • Most utilities lack comprehensive climate adaptation plans.

Conclusions:

  • Utility manager perceptions of climate risks are inconsistent and geographically biased.
  • There is a critical need for directed guidance and policy support for utility climate adaptation planning.
  • Integrating climate hazard assessments into required utility risk evaluations is recommended.