Black stains and discoloration on outer foundation wall of a house - water damage?
I do not think the mold is from high water.
I would say it is more likely on a shaded portion of the home on next to an area with a lawn. notice the path in the snow a walkway on the front section? The damage to the bottom of the window  possibly from shade or lawn being watered but doubtful that it is caused from flooding, notice how it ends and the “rust” stains on the wall above the mold and to the left.
With the info in the photo I would say it’s not a high water issue.