What may indicate a plumbing leak in your home?

Water stains and mold growth can be strong indicators of a plumbing leak because these phenomena typically occur when moisture is present in areas where it shouldn't be. When there is a leak, water can seep into walls, ceilings, or floors, causing stains that may appear as discolored patches. Mold thrives in damp environments, so the presence of water from a leak promotes mold growth, which can be seen as dark spots or fuzzy patches on surfaces.

Addressing water stains and mold is crucial, not only to maintain the structural integrity of the home but also to ensure a healthy living environment. Identifying leaks early through these visible signs can prevent further damage and more costly repairs down the road. The other options may also suggest plumbing issues, but they do not specifically indicate the presence of a leak in the same direct and visible manner.