One of the simplest proactive steps is getting an annual plumbing inspection. These are often free or free with other services. The plumber will inspect all visible plumbing including fixtures, pipes, appliances, and drains. They diagnose and fix small problems before they become big ones. They can also tell you the best time to replace worn fixtures and appliances.
Surface molds grow in just about any damp location, such as the grout lines of a ceramic tiled shower. They’re easy to scrub away with a mold cleaner mixture of 1/2 cup bleach, 1 qt. water and a little detergent. In mold remediation, the bleach in the cleaning mixture kills the mold, and the detergent helps lift it off the surface so you can rinse it away so it won’t return as fast. You can also buy a mildew cleaner at hardware stores, paint stores and most home centers.
Category 2 Water - Refers to a source of water that contains a significant degree of chemical, biological or physical contaminants and causes discomfort or sickness when consumed or even exposed to. Known as "grey water". This type carries microorganisms and nutrients of micro-organisms. Examples are toilet bowls with urine (no feces), sump pump failures, seepage due to hydrostatic failure and water discharge from dishwashers or washing machines.