Which statement best describes the difference between domestic wastewater and industrial wastewater?

• A. Industrial wastewater is always non-hazardous and from factories.
• B. Domestic wastewater comes from households; industrial wastewater contains process-based pollutants requiring pretreatment.
• C. Domestic wastewater includes household sources and does not require pretreatment.
• D. Industrial wastewater is wastewater with only solids.

Answer: (B)