Category 3 (black water) floods contain pathogenic agents and are grossly unsanitary. These are typically from rising water such as river flooding or sewage back-flows but can come from other sources such as a Category 2 flood that has not been removed promptly. Toilet back-flows that originate from beyond the toilet trap are considered black water contamination regardless of visible content, color or odor. Technicians performing gray or black water restoration must be trained in microbiology, biocide use, psychrometry, and health and safety equipment use.
Water Restoration – Category Three