Wastewater created at a building is subdivided into three types. Which set correctly lists them?

Wastewater created at a building is subdivided into three types. Which set correctly lists them?

• A. Blackwater, Gray Water, Storm Water
• B. Gray Water, Blackwater, Storm Water
• C. Gray Water, Black Water, Storm Water
• D. Gray Water, Storm Water, Black Water

Answer: (B)

The main idea is knowing the three categories of wastewater that can be generated in a building: gray water, black water, and storm water. Gray water comes from sources like sinks, showers, baths, and laundry and does not include toilet waste; it’s typically less contaminated and may be treated or reused in some systems. Black water contains toilet waste and other waste flushed through the plumbing, carrying higher levels of contamination and requiring more robust treatment. Storm water is rainfall or runoff from the building site and is usually handled through a separate storm drainage system rather than the sanitary wastewater system. Any list that includes all three categories is correct, since they are the three types. The set Gray Water, Black Water, Storm Water shown in the option is a valid ordering of those three, which is why it is the correct choice.

The main idea is knowing the three categories of wastewater that can be generated in a building: gray water, black water, and storm water. Gray water comes from sources like sinks, showers, baths, and laundry and does not include toilet waste; it’s typically less contaminated and may be treated or reused in some systems. Black water contains toilet waste and other waste flushed through the plumbing, carrying higher levels of contamination and requiring more robust treatment. Storm water is rainfall or runoff from the building site and is usually handled through a separate storm drainage system rather than the sanitary wastewater system.

Any list that includes all three categories is correct, since they are the three types. The set Gray Water, Black Water, Storm Water shown in the option is a valid ordering of those three, which is why it is the correct choice.