I do some work for Texas Parks & Wildlife and while I'm not allowed to speak on their behalf in any official capacity, I can say that one of their most concerning issues is water conservation.
In fact this past February they had a video played on PBS (www.texasthestateofwater.org
for more info) that addressed just that.
People don't realize how precious water is to our economy. It *IS* possible to bring water back to an area that has lost it, but it's not as easy as if you just conserve it to begin with.
There are plenty of towns here in Texas that have lost their rivers and streams due to careless usage of water.
Water is NOT a renewable resource. You CAN dry up a river.
Speaking as a citizen of Texas, I really wish more people would get on board with water conservation.