I recently emptied, powerwashed, and refilled my pool. As part of the restarting it, I looked far and wide for a simple recommendation of the proper CYA level for Austin, Texas. It was very hard to find, so I'm hoping this post will be helpful to others in my situation.
I asked the people that built our pool, and did the initial fill; they stated 70-80 ppm for CYA.
This seemingly high value is, of course, due the long hours of sun we get here. My pool was great at this level, until I turned it off for a long vacation :-/, so I can say it definitely worked well to hold/stabilize the amount of chlorine added daily by my tablet chlorinator.