What does it mean to dream about a room flooded with grey water but the rest of the house is not flooded?

That you went to visit someone in alabama and there out house flooded

my guess: that you have compartmentalized your emotions and all the negative ones you put in this room in the back of your mind but too much time doing this makes that now the room is more and more difficult to go into. that or you've been procrastinating about important stuff and this negligence makes a slow accumulation of problems which you try to not think about by putting it all in one section of your mind where you try to not go. something like that. the house is your mind.

which room (was flooded)

Septic tank needs a good s scrubbing

Dreams are personal to your circumstances, anything else is projection.

time to flush....😅

Sewer