Water FAQs

Find answers to Frequently Asked Questions (FAQs) for various drinking water topics. Topics and content are continually added below.

  1. Where does Napa's water come from?
  2. Who is served by the City of Napa Water System?
  3. What are the major components of the Water System?
  4. How much water is used by City of Napa customers?
  5. How do I establish water service?
  6. How much does the water cost?
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  1. I’ve never heard of disinfection byproducts before, so why am I hearing about this now?
  2. Why do we need to add chlorine to the water?
  3. What is a THM and how is it formed?
  4. How much is a ug/l?
  5. What about other water systems?
  6. What can I do to lower the THMs at my tap?
  7. Are personal home filters effective?
  8. Should I drink bottled water instead?
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