What's the difference in clean water, dirty water, and black water damage? Clean water damage is classified as excess water in your home or business that is free of microorganisms. This type of damage usually includes leaks from plumbing fixtures or appliances. While the initial damage isn't a health hazard, ignoring it can result in mold or mildew growth that can affect your health. Clean water damage should be managed before mildew or mold growth begins. If the damage was