Which of the following is NOT a type of waste?

• A. Water waste
• B. Garbage
• C. Rubbish
• D. Infectious waste

Answer: (A)

In waste management, especially in healthcare and preventive medicine settings, waste is often categorized into solid waste types such as garbage and rubbish, and hazardous categories like infectious waste that require special handling. Water waste, meaning wastewater or liquid effluent, isn’t treated as a solid-waste type. It’s managed as a liquid waste stream and typically goes to wastewater treatment rather than being lumped with garbage or infectious solid waste. So water waste isn’t a standard type of solid waste, which is why it’s the best choice for “NOT a type of waste.”