I'm thinking about switching over to a salt system and the only other thing that I can think of that hasn't been addressed here is will it hurt my lawn?

I live out in the country in West Texas and often during the summer the only water my grass and trees get is from when I backwash the filter or vacume to waste (which I have to do a lot, due to living in the middle of a pasture!)

Are the salt levels low enough to keep from killing the grass?