If it is coolant, a leaky heater core. If it is water, a clogged ac drain or damaged door gasket.
should be under the passenger floor
On every honda/acura i have ever worked on its always under the passenger side floor mat. Its a metallic looking box some are silver or bronze.
Heater. Core
Underneath the passengers seat Actually its on the passenger side but on the front of the floor board. Just peel back the carpet on the front passenger side and you will see it
There is a good chance that the heater core has rusted out. This is a little radiator inside the passenger compartment for transferring heat from the engine coolant to the air in the cabin. Always fun to replace.
Water on the passenger side floor would be a plugged up AC drain. The drain is located under the hood, at the lowest point on the HVAC box on the firewall. However if the floor is wet with engine coolant, the heater core is leaking.
Check for a sickly sweet smell. The heater core is probably leaking coolant into the floor. The core is not repairable but can be replaced.
I am not sure, but I would guess it would be near the floor board of the front passenger seating area. It's behind the glove compartment which has to be removed...20- 30 minutes.
It fastens to a pass through stud at the passenger floor.
eighth floor of what dungeon?
Typically that leak is caused by a leak in the heating system. The heater core is under the dashboard, just above the passenger side.
The heater core is probably leaking engine coolant. Replacement is necessary.