It's easy enough to find out about Santa Clarita and their water problems if you Google it. I haz mad interwebz skillz!
So yeah, I'm not surprised the OP is ignoring any request for information, nor am I surprised that those 'gorgeous' 10 acres haven't sold even with a continually reduced price.
Can't build if there isn't any available water. Don't know why some realtors think buyers are stupid.