Water that has a significant degree of chemical, biological, and/or physical contamination and potential to cause sickness or discomfort is classified as what?

The correct classification for water that has a significant degree of chemical, biological, and/or physical contamination, posing potential risks for sickness or discomfort, is referred to as Category 3. This category specifically denotes water that is unsanitary and may contain pathogens or toxins that could lead to health issues.

In water damage restoration terminology, Category 3 water, also known as "black water," typically includes flood water, sewage, or any water that has been in contact with hazardous materials. It requires careful handling, specialized cleaning protocols, and often professional remediation to ensure safety and prevent the spread of contaminants.

Categories 1 and 2 describe different levels of water contamination: Category 1 is considered clean and safe, while Category 2, known as "gray water," has some level of contamination but is not as hazardous as Category 3. Clean water, as a term, is used to classify water that is free from hazardous contaminants and is safe for human use, unlike the water described in the question.