I live in florida too, but on the other coast - I'm in clearwater. It took me about forever to get used to drinking the tap water (and I can only drink it if its loaded with ice - somehow the cold kills the horrible taste).
They use chloramines to treat the water but once treated it tests at 0 for ammonia. I can't believe the ammonia levels in your water ! I've been following your threads.
I can't imagine that water with that level of ammonia is healthy ! while you're out getting R/O water for your tank will you be getting some for yourself ?