If you want to install an inground pool and you live in a home with a well and or a septic tank, yes an inground pool can be installed. Each county has a requirement on the distance you need to be away from your well or septic. You need to check with your local building department to get this exact number.
An inground pool has its own plumbing system so it will not have to be connected to your plumbing. The water edge of the pool needs to be a certain distance away from the well or septic but in most cases; your pool patio would not have to be this distance away. Be sure you tell your pool installer where your septic tank and drain field are located.
The septic tank also has drain lines that can extend out 60 to 90 feet or more. You need to know where these lines are. If you have no idea, you should contact your local building inspector or health department to see if they have a copy of your property plat showing where the builder installed these lines. Water edge of the pool also has to be a certain distance from these lines. Your building department can tell you that requirement.
The pool dealer you have contracted with to install your pool also should know these requirements and can help you with your pool location on your property. Just remember, before doing any excavation, determine where your septic tank and drain lines are located.