HAZWOPER 40-Hour Practice Exam 2026 – Comprehensive Prep for Certification

The EPA's definition of hazardous waste is found in 40 CFR 261.3. This section provides detailed criteria for identifying hazardous waste and specifies the characteristics that make waste hazardous, such as ignitability, corrosivity, reactivity, and toxicity. Understanding these definitions is crucial for compliance with regulations concerning waste management and for ensuring safety when handling potentially hazardous materials.

While there are other sections within the 40 CFR that pertain to hazardous waste (like 40 CFR 261.1, which discusses the definitions of terms used within the regulations, and 40 CFR 261.2, which addresses the exclusion of certain types of waste), it is 40 CFR 261.3 that specifically delineates what constitutes hazardous waste. This makes it a key reference for any organization that deals with such materials, as it outlines the criteria that must be met for waste to be classified as hazardous.

In contrast, 49 CFR 172.101 pertains to the transportation of hazardous materials and does not define hazardous waste, further reinforcing the focus of 40 CFR 261.3 on the characterization of waste under the Resource Conservation and Recovery Act (RCRA).