Category 1 Water refers to non-contaminated water also known as “clear water”.
Category 2 Water refers to a source of water that contains a relatively significant amount of chemical, physical, and/or biological, contaminants. This is also referred to as “grey water”. Examples include toilet bowl overflows containing only urine, sump pump failures, seepage due to hydrostatic failure, and water discharge from dishwashers or washing machines. If left untreated a category 2 water source can be reclassified as category 3.
Category 3 Water refers to a source of water that is generally unsanitary and requires immediate attention. The water contains harmful contaminants that may cause severe discomfort or illness. Category 3 water affects indoor environments that are contaminated by sewage, seawater, rising water from rivers or streams, and standing water.