Also, if the water flows into the lake from another property or flows out of the lake to another property, then the state claims all the lake as a "state water" and they can reguate whether or not you can even use a drop of "your" water.
Wells that tap into underground flow from one property to the next are also deemed state waters so even those are not "safe".
GA is about to re-write its water rules beginning in January at the state capitol and thankfully, the golf industry (particularly in GA) has done an excellent job working with the EPD and hopes to receive decent treatment when the new rules are announced.
The allied golf groups in GA (GSGA, GPGA, GCSAA, CMAA and GCOA) have done a good job beginning 5 years ago, getting the industry's message out and we have a decent seat at the table during this process.