Category 1: “Clear water,” which is the first level, refers to water originating from a source free of contaminants (aka clear). Water from leaky faucets, direct rainwater, broken inbound pipes or water supply lines are all categorized this way, and category 1 water should not pose health issues if consumed.

Category 2: Grey water, the second category, is a bit more serious. This is wastewater generated from appliance or drain overflows, as well as other types of household flooding. This water is often contaminated on its own and/or has come into contact with a variety of surfaces. Therefore, category 2 water is somewhat contaminated and can cause illness if consumed.

Category 3: Category 3 water is the most notorious and is commonly known as black water. Rising flood waters, sewage overflows or water that has begun breeding bacteria due to stagnation are all cause for concern. Black water can also lead to illness or death if consumed.