Water damage is classified according to the water’s source and contamination level. The three main categories of water damage are clean water, gray water, and black water.
Clean water damage comes from sources like a broken pipe or faucet. This water is clean and poses no threat to human health.
Gray water damage comes from sources like a washing machine or dishwasher. This water may contain some contaminants, but is generally safe for humans.
Black water damage comes from sources like a sewage backup or flood waters. This water is contaminated and can pose a serious health risk.
If you have water damage in your home, it is important to identify the source and type of water so you can take the appropriate steps to clean and repair the damage.
https://www.usfa.fema.gov/downloads/pdf/publications/fa_9_water_classifications.pdf
https://www.angie list.com/articles/understanding-types-water-damage.htm
https://www.IICRC.org/consumers/care-your-home/water-damage/