wet passenger side rear floor?

Hello,

Typically you will get water on the passenger floor for either having a leak on the windshield seals or evaporator for the A/C system being drained inside the car, due to a clog on the drain that goes to the outside.
The condensation will accumulate while the A/C is operational and it suppose to drain to the outside of the car.
There is a drain on the firewall on the passenger side of the car, for the evaporator. It is likely clogged with dirt/debris.
Clean it out and the issue should go away.

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Let me know of any questions.
Thank you.