Indoor Air sciences CSMI Practice Exam

According to IICRC S500, water from a backed up washing machine would be classified as?

1. Category 3

2. Category 2

3. Category 1

4. Category 4

The correct answer is: Category 2

Water from a backed-up washing machine is classified as Category 2 according to the IICRC S500 guidelines. This classification, also known as "grey water," pertains to water that is contaminated with biological, chemical, or physical contaminants but is not considered highly unsafe for human contact. Grey water could potentially cause illness or discomfort if ingested or if it comes into prolonged contact with the skin. In the context of a washing machine backup, the water may contain traces of detergents, dirt, or other contaminants from the clothing being washed. Although it is not as hazardous as Category 3 water (which is "black water" and poses a serious health risk due to high levels of pathogens), Category 2 water still requires careful handling and remediation to ensure safety and prevent further contamination. Understanding these categories is crucial for properly assessing water damage and implementing the appropriate cleaning and restoration protocols in accordance with industry standards.