A/C LEAKING IN PASSAGER FLOOR

your a/c evaporator and drains are full of mold. a good local repair shop can clean this out with a solution that they will pump inside the evaporator case. this is a fairly common problem in geographic areas with lots of humidity and you are there!

There is a process called a Ventillation service which fills the dash with foam to clean out the drains and kill the mold. A company online called Autoadditives.net sell the product.