Domestic waste is wastewater that comes from which sources?

• A. Stormwater and industrial effluent
• B. Agricultural runoff
• C. Residential and institutional establishments
• D. Commercial refuse only

Answer: (C)

Domestic wastewater comes from everyday living activities in places where people reside or are housed, including both homes and non‑industrial institutions. It covers water from toilets, sinks, showers, and laundry in residences as well as similar discharges from places like schools, offices, and hospitals that aren’t producing industrial process wastes. This stream is separate from stormwater (rainwater runoff), industrial effluent (water from manufacturing), agricultural runoff, or solid refuse, all of which originate from different sources. So the sources are residential and institutional establishments.