An official website of the United States government.

We've made some changes to If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

Conduct a Drinking Water or Wastewater Utility Risk Assessment

Vulnerability Self-Assessment Tool - Web Enabled (VSAT Web) 2.0

VSAT Web 2.0 is a user-friendly tool  that can help drinking water and wastewater utilities of all sizes to conduct a risk and resilience assessment.

With VSAT Web, a utility can:

  • Identify the highest risks to mission-critical operations and
  • Find the most cost-effective measures to reduce those risks    

Highlights of VSAT Web:

  • Designed for mobile devices like Android tablets and iPads, as well as personal computers, and runs on most Internet browsers.
  • No VSAT Web User data is stored by or visible to EPA!
  • VSAT Web is now available as an app on Apple iOS. 

Recommendation on Use:

EPA recommends that the quantitative risk assessment be limited to a small number of the assets and threats that present the highest risk. Attempting to analyze a high number of asset/threat pairs in a single assessment will render the assessment difficult to complete and make the interpretation of results challenging. Strategies to reduce the number of asset/threat pairs including grouping similar assets into a single asset category and limiting threats to those with the highest likelihood of occurrence.

Open VSAT Web 2.0 (for Microsoft and Android operating systems)

Download VSAT Web 2.0 Apple iOS App

Before downloading VSAT, save any earlier VSAT analyses and clear the browser cache.