Water on DRIVERS side floorboard

On both the front and read on the drivers side the floorboards retain water which turns to ice during the winter here in Spokane, WA. Threw it up on a lift looking for a source (Rusted floorboard or something) But nothing. Undercarriage looks great. looking for insight.
Comments
-air ducts
-leak from the windshield that makes its way behind the dash
-e-brake cable holes
-firewall wire harness grommets
Thats all I can think of off the top of my head.
LHD Also I will check out those possible places
lol
Spokane....
Watch the meets section. I'm sure we'll have another soon.
last time i checked it was spocompton...
RHD or LHD?
I was thinkin you might be parking leaning to the left & water is leaking in.In which case check:
water in passenger floorboard
Look for the Tegtips link.
Here's a tip I gave 90shuttle:
:idea: I haven't done the fix yet.My only advice is :
Don't park pointing down hill.A slight incline is OK,you'll need to experiment .
Park under a tree w/lots of leaves so it covers the right(in your case the left) wiper area.