Water in front passenger floor

If this happens after you've run your AC and it's water, then you have a clogged condensate drain. The condensation can't drain out and fills the heater box until it overflows. See this post on clogged drains.
https://ricksfreeautorepairadvice.com/passenger-side-carpet-wet/

There is a drain coming out of the Heater & A.C. box it should go thru fire wall usally on passenger side.What kind of car?

Whenever I see a system which is leaking from more than one or two places, I do a head gasket check because that tells me that the system is experiencing above normal pressures. the wet floor is a heater core. whether it's a water pump or some other thing near it only you can tell. Actually it rarely happens, but the wet floor could be the hose where it meets the heater core at the firewall; again, only you will be able to tell the difference. if the hose connection looks dry, assume that it is the core itself.

The A/C drain is located on the bottom of the firewall on the passenger side. It should be easily found from under the car.

If its getting soaked by water even when u re sure u didn't drive through any water. It might be ur AC water outlet hose. It needs to be redirected

Check the drain clogged, underdash, passenger side.

Did they blow out the A/C drain?

have the AC evaporator (found under the dash) inspected. It may need cleaning or the drains may have fallen out of place.

drill a hole through the floor as a quick fix ,if it gets in let it out ,then check for the leak ,try under the firewall where the AC drain pipe is ,it could be the same pipe for drain water coming in from air intake vents

you can test again the car by putting a garden hose at the front of the windshield where it is supposed to **** fresh air. if you have a rusted part there and water could sipped in.

another option would be the recycle door of the airconditioning could be partly open ang letting the water come inside the car..

tnx 4 using fixya,

drcool