If I convert the space above my garage to an ADU do I still need a new septic system?

An ADU must be served by a separate septic tank and the leachfield is required to be sized for a minimum of 2 bedrooms. If the existing septic system is not adequately sized and/or adequate data regarding the system does not exist, soils testing will be required to determine the sewage disposal requirements for the ADU.

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1. Can I connect my ADU/JADU to my existing septic system?
2. If my existing home is on septic but public sewer is nearby what are my requirements?
3. If I use a tiny home as my ADU/JADU are the septic system requirements different?
4. If I convert the space above my garage to an ADU do I still need a new septic system?
5. What is the 100% repair area and can I use this area for the construction of my ADU?
6. What are the domestic water supply requirements for an ADU?