What is the correct method for disposing of unused pesticides?

The appropriate method for disposing of unused pesticides is to follow state and local hazardous waste disposal guidelines. Pesticides are considered hazardous waste due to their potential environmental and health risks if not managed properly. Each state may have specific instructions and facilities designated for hazardous waste disposal, which ensures that the chemicals are handled in a manner that mitigates risks to public health and the environment. By adhering to these guidelines, individuals ensure that pesticides are disposed of safely, preventing contamination of land and water sources and avoiding adverse impacts on ecosystems and human health.

The other options, such as throwing pesticides in the regular trash, flushing them down the toilet, or pouring them down a storm drain, are highly discouraged as they can lead to significant environmental pollution and pose dangerous health risks.