What waste can never be dump in inland waters?

Waste that can never be dumped in inland waters includes hazardous materials such as chemicals, heavy metals, and petroleum products, as they can severely harm aquatic ecosystems and human health. Additionally, untreated sewage and industrial effluents are prohibited due to their potential to cause significant pollution and degrade water quality. Solid waste, plastics, and any non-biodegradable materials should also never be disposed of in inland waters. Regulations vary by region, but the overarching principle is to protect water resources from contamination.