What are the domestic water supply requirements for an ADU?

In order to construct an ADU/JADU the parcel must be served by a potable water supply defined as either public treated water or a domestic water well drilled under permit.  A domestic water well must produce a minimum of 1 GPM per residential unit.  A 4-hour well yield dated within the last 3 years may be required to provide evidence of water quantity.  Ditch water, spring water and hand dug wells are not considered a potable water supply. Parcels would be required to obtain a potable water supply prior to Environmental Health approval of the building permit for the ADU/JADU. 

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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?