Category 3, commonly called "black water," is highly contaminated water that poses significant health risks. Sources include raw sewage backups, toilet waste overflows, flooding from rivers and streams, and water that has been standing long enough for bacterial growth. Category 3 events require full personal protective equipment, strict containment, antimicrobial treatment, and removal of all porous materials that cannot be properly decontaminated.

Standard homeowners insurance policies typically do not cover flooding from external sources such as rising rivers or storm surge. This type of flood damage requires a separate flood insurance policy, available through the National Flood Insurance Program (NFIP) or private insurers. However, sudden and accidental water events originating inside the home — such as pipe bursts or appliance overflows — are typically covered under standard policies.

Timeline depends heavily on the category of water, the scope of damage, and the extent of material removal required. A Category 1 residential flood in one room might complete remediation in 4 to 7 days. A Category 3 basement sewage event involving extensive material removal and antimicrobial treatment may take 10 to 21 days before the structure is ready for reconstruction. We provide a project timeline estimate after our initial assessment.

It depends on the material and the category of water. Ceramic and porcelain tile can often be cleaned and dried successfully if the subfloor beneath is properly dried. Hardwood flooring may be salvageable with aggressive drying if addressed quickly, but cupping, buckling, and warping often make replacement necessary. Carpet and padding exposed to Category 2 or 3 water are almost always removed, as thorough decontamination of carpet fiber is not practically achievable.

Sewage backup cleanup is the process of safely removing, decontaminating, and drying a space that has been exposed to raw sewage or Category 3 contaminated water. It is inherently hazardous — sewage contains bacteria, viruses, and parasites that pose serious health risks through contact or inhalation. Flood Department technicians perform sewage cleanup in full PPE, establish containment zones, remove contaminated porous materials, and apply EPA-registered antimicrobial agents. This work should never be attempted by untrained individuals.