Why is there water leaking on my floor mat on the passenger side of my Rav 4

SOURCE: Water on Drivers side Saturn SC2

Is it antifreeeze from heater core or heater core hose leak?  Is the leak pure water, or maybe something else?
Put it in the garage again overnight with an old white towel in the drivers foot well, best if you can find a way to stretch it from drivers seat forwar to firewall and keep it off of floor mat.  Check it before you go to bed,  then in the morning if no leak found yet.  see if the color/location of the spot helps you identify the source.  I think the heater core is under the dash center.  Anti freeze is green/yellow or orange.
good luck

SOURCE: air conditioner leaks (drains)into the front passenger seat floor mat

I had the same problem. Drilled a hole in the round plastic extension beneath the glove box, behind the carpet. Now run a coat hanger through it, followed by alot of compressed air. It may take several times, debri from above may be continuosly replugging drain. when you are done, clean thoroughly, and patch with hot melt glue. Good luck.

SOURCE: 2000 Saturn ls2 Coolant leaking into car on passenger side

Your heater core is in need of replacement.

SOURCE: 2005 Chrysler Pacifica-Air conditioning leak

The 05/04 Pacifica did not come with an elbow tube on the drain line for the AC drip pan. As you drive, the air flow into the tube pushes the condensate water back into the pan which is inside above the passenger floor board, the drain line is under the hood on the firewall. I spoke with the parts guy at the local Chrysler dealer, he sold me a drain tube for the 06 (~$10) and I installed it, wasn't too hard to do from the top if the engine is cold. The elbow slips on over the drain tube. Make sure to point the tube down. It only took one trip to start seeing water drip out of the tube and the floorboard started to dry up and almost three years later, the floorboard is still dry.

SOURCE: water is leaking in the passenger side floor when

This means your air conditioner drain tube is clogged. This will take about a hour shop rate to repair or if you look behind the glovebox you will see it. Thanks