How Is Flood Damage Categorized by Restoration Pros?

Restoration pros use a standard system to group flood damage by how contaminated the water is. Category 1 is clean water that comes from a broken supply line, a faucet, or rainwater that has not touched the ground. This water poses little health risk, but it can still soak into drywall, wood, and carpet quickly.

Category 2 water has significant contamination and may cause discomfort or illness if swallowed. Examples include water from a dishwasher, washing machine, or toilet bowl overflow (without feces). Category 3 water is grossly contaminated and can contain pathogens, toxins, or sewage. Floodwater from rivers, streams, or standing water that has been sitting for days usually falls here.

• Category 1: clean water from a broken pipe or supply line
• Category 2: water with significant contamination from appliances
• Category 3: sewage, floodwater, or standing water with microbes
• The category affects drying methods and what materials must be removed
• Higher categories often require more extensive safety precautions

The pros start by identifying the source of the water and how long it has been sitting. A burst pipe that is fixed quickly usually stays Category 1. If the water has been in contact with soil, debris, or chemicals, it may move up a category even if it started clean.

They may test the water for bacteria or other contaminants if the source is unclear. The pros also look at the condition of the water, its color, and any odor. This assessment is part of a broader water damage inspection, which you can read more about on the water damage inspection page.

Your insurance policy may cover certain types of water damage, but not all. Standard homeowners policies often cover sudden and accidental water damage, like from a burst pipe. Flooding from outside, such as river overflow, usually requires separate flood insurance.

Policies vary, and your insurer decides what is covered. Check your policy to see what is included and what is excluded. The category of water damage can influence what your insurer considers covered, so document the source and condition of the water. You can find more on the damage restoration insurance claim assistance page.