Firewall drain line

Hi all,
After a drive other day I noticed dripping from the passenger side of my 2017 SR, just behind the passenger tire. Upon inspection, it is water and coming from this short 1/2" hose out of the firewall. It’s winter here in Central Cali, so I wasn’t using the A/C - which rules out condensation from the A/C. Does anyone know what this is?
Thanks in advance.

 

It's the AC drain line.

Maybe you were running the Heat and the compressor simultaneously.

 

Its the ac drain. You have the defroster on?

https://www.tacomaworld.com/threads/rust-on-frame-with-a-c-drain-mod-fix.444138/

 

Were you running the defroster?

 

Easy mod and definitely necessary with how much these trucks piddle!

 

Do the mod, call it good. If its coming from the tube, don't worry about it.

 

Thanks all - I did have the defroster on.
And from what I’m gathering from the replies, that line is the drain line for the A/C.