Hazardous wastes include:

Hazardous wastes are specifically defined materials that can pose a substantial risk to human health or the environment when improperly managed. The answer indicates that all the categories listed can be considered hazardous waste depending on certain conditions and classifications set forth by regulations.

Industrial discharges permitted under the Federal Water Pollution Control Act (FWPCA) can become hazardous if they contain specific levels of toxic substances or if waste materials are improperly managed, leading to contamination of water or soil. Thus, certain regulated industrial discharges can indeed fall into the category of hazardous waste when they pose risks to safety and environmental standards.

Agricultural wastes can also be considered hazardous waste. While many agricultural by-products may be managed as benign materials, some agrochemicals, pesticides, and fertilizers can be hazardous when they accumulate or are disposed of improperly, thereby affecting ecosystems and human health.

Permitted irrigation waters generally refer to controlled water used for agricultural purposes that meets certain safety standards. However, if these waters carry contaminants that exceed regulatory limits, they can then be classified as hazardous waste due to their potential to cause harm.

The agreement that all these categories can potentially be harmful underlines the importance of proper management, treatment, and disposal practices in the context of hazardous waste regulations. Hence, the response correctly