Which statement accurately defines hazardous waste?

Which statement accurately defines hazardous waste?

• A. Waste that is non-ignitable and non-toxic
• B. Waste that is ignitable, corrosive, reactive or exceeds EPA limits
• C. Waste that is always recyclable
• D. Waste restricted to households only

Answer: (B)

Hazardous waste is defined by its properties or by regulatory limits that make it dangerous to health or the environment. The statement that hazardous waste is waste that is ignitable, corrosive, reactive, or exceeds EPA limits captures the main ways waste is classified as hazardous. A substance that catches fire easily is ignitable, a chemical with very acidic or very basic pH is corrosive, and reactive wastes can explode or release toxic gases when mixed or wetted. If a waste contains contaminants above the EPA's toxicity thresholds, it is treated as hazardous because those levels pose risks to people and ecosystems. This helps explain why other options don’t fit. Not all hazardous waste is non-ignitable and non-toxic; some are hazardous precisely because they ignite, corrode, or react. Hazardous waste isn’t inherently recyclable in every case, and it isn’t limited to households—industries, laboratories, and many facilities generate hazardous waste that must be managed properly.

Hazardous waste is defined by its properties or by regulatory limits that make it dangerous to health or the environment. The statement that hazardous waste is waste that is ignitable, corrosive, reactive, or exceeds EPA limits captures the main ways waste is classified as hazardous. A substance that catches fire easily is ignitable, a chemical with very acidic or very basic pH is corrosive, and reactive wastes can explode or release toxic gases when mixed or wetted. If a waste contains contaminants above the EPA's toxicity thresholds, it is treated as hazardous because those levels pose risks to people and ecosystems.

This helps explain why other options don’t fit. Not all hazardous waste is non-ignitable and non-toxic; some are hazardous precisely because they ignite, corrode, or react. Hazardous waste isn’t inherently recyclable in every case, and it isn’t limited to households—industries, laboratories, and many facilities generate hazardous waste that must be managed properly.