How much Water is too much?

Probably normal. Try running car for an hour with a/c off and see if the dripping stops.

 

The drip is normal; condensation coming off of your evaporator. You would have a bigger problem; if it wasn't dripping. That would mean that your drain tube is clogged and water would be pooling in your HVAC system. The dark, cool environment is perfect breeding ground for mold formation.
FWIW: I turn-off my A/C system 10-15 minutes before my destination - giving it a chance to blow-out/dry-out; thereby reducing the chances of mold formation. I realize you can't do that all the time, because it's 90+ out there; but when you can do it - you probably should.

Hope this helps.

 

And if you are not in the habit of running the AC in "recirculate" mode, try doing that.
It should cut down on the amount of condensation......maybe by a LOT.

 

A member from Florida posted this solution, for a somewhat related issue with A/C.
Good possibly to test out in your situation, I'd think? Weird AC Smell - NOT mildewy coil | PriusChat

 

30-50% sounds almost arid, but what I am finding on Google suggests San Antonio averages well above that, getting a lot of air from the Gulf. Plenty of water there for the A/C to be squeezing out of the air.

 

Sounds very normal. Especially if it's not in recirc mode. But I keep mine in recirc and always seem to have a small lake under the car.

In fact, "too much water" would be an impossibility. Not enough water might indicate a problem though. The more the system can reduce the moisture in your cabin air, the better it's working.

 

"Im guessing it is water from A/C. Coolant levels are full and not falling faster than normal."

If it is clean, clear water, it is condensation of the humidity in the cabin air. There is no colorless water in the car's systems. You'll see the pink dye in the coolant reservoirs under the hood. If it was brake fluid your brakes would have already failed. Brake fluid feels odd when rubbed between the finger tips. Transmission fluid is oil dyed red. Engine oil is, well, oily, and usually dirty. That covers the fluids in a Prime. How do you tell the color?...soak some up in a white paper towel.