My wife and I were living just a few miles west of the San Antonio city line in 2006. Water use restrictions were the norm. Evey time it rained was a news event and the aquifers were monitored every day on TV and the news paper.
Well, I have one sister living in Boerne and the other in the Helotes area. I also have a friend living just outside Loop 1604 near Blanco RD. They say the same thing about the water restrictions.
Here in the Austin area, there are signs posted on all the major roads that are in the Edwards Aquifer recharge zone. Of course, most of that is in the southern part of Austin and that is a liberal haven. It is also one of the areas that has the most trash along the roadside.