What type of pollutants must IUs specifically notify the POTW about?

Industrial Users (IUs) are required to notify the Publicly Owned Treatment Works (POTW) about specific types of pollutants that could potentially disrupt the treatment process or harm the infrastructure. Corrosive materials and solid or viscous pollutants fall into this category.

Corrosive materials can cause damage to pipes and treatment equipment, leading to added maintenance costs and operational issues. Solid or viscous pollutants can impede flow in the treatment system, create blockages, and challenge the efficiency of biological treatment processes. This requirement is in place to ensure that the POTW can adequately prepare for and manage any waste that may pose a risk to their operations or the environment.

On the other hand, oil-based and non-toxic waste, nutrient pollutants, and biodegradable waste may not require the same level of notification, as they are often managed through standard treatment processes unless they exceed certain thresholds or concentrations that could lead to issues. Thus, notifying the POTW about corrosive and solid or viscous pollutants is crucial for maintaining the integrity of wastewater treatment systems.