We have water dripping from a line that leads to the outside of the house. There is a lot of water coming from this line and forms a pool of water outside. We have 2 furnaces and it is happening on both of them. The ground remains soggy or wet. There is a humidifier on each furnace. What is the cause?

Not knowing what kind of furnace you have, brand,model number or anything needed I might guess it could be condensation water,, they /some furnaces are supposed to do this, you could dig a hole about the size of a 5 gallen bucket,fill about 3/4 full of gravel or small stones and run a pipe from the line coming outside and into the hole full of stone, or you could just leave it alone