I just noticed this week that deep black spots have started to appear on practically all my fig trees. This doesn't look like the normal rust that happens at the end of season and causes the leaves to drop. I'm in the Tampa area and it has been dry so the only difference is running the irrigation sprinklers that have reclaimed water. What is this and how do I treat??
   

Looks like black mold. Im not a expert but i did have black mold on my windows and it loked just like that. Never seen it on trees or plants.

Take off all infected leaves, spray with copper or Neem oil...

We are in our 2nd year of drought here (very bad in Jackson Co. FL), but I use well water...

Maybe consider infestation?

I would do the following:
Check for scale or aphids. Both can be associated with sooty mold.
Do not irrigate with overhead sprinklers. Only roots should be getting wet.
Prune out affected growth and monitor plants.
Selectively thin to encourage air movement through crown.
Where is the reclaimed water coming from? Possible contaminants?
Do not fertilize with high amounts of nitrogen.
Good luck