2001 Tacoma leaking in cabin onto passenger floor ...is there a fix?

Sounds like you have the water leak that the TSB is meant to address. Especially if you notice it during raining mostly. It's not as easy as making sure the AC evap condensate line is clear but is doable for a DIY person. Looks like someone posted a link above already. Lots of good info here on this repair.

 

And the carpet and backing have just broken down from being repeatedly wet. No biggie on the function end of things.

 

Ive seen the TSB, probably something I dont want to tackle at this point. I am worried that it could rust out the bottom of the truck but after years I see no rust anywhere. No salt on our roads either since Im in oregon. However, where is the water from my AC going since the drain is clear and I see no dripping while its on??