How are hazardous substances identified under CERCLA?
CERCLA identifies hazardous substances based on their inclusion in existing environmental regulations, such as the Clean Water Act and the Clean Air Act. The Environmental Protection Agency ([EPA](https://)) maintains a list of these hazardous substances. Toxicologists contribute to this process by evaluating the health effects and environmental impacts of various chemicals, considering factors such as toxicity, persistence, and bioaccumulation.
