Which pollutants fall under the Specific Prohibitions of Prohibited Discharge Standards?

The option regarding corrosive materials, fire hazards, and toxic gases is correct because these substances are explicitly recognized in environmental regulations as being harmful and undesirable when discharged into wastewater systems. These specific prohibitions are designed to protect treatment plants, human health, and the environment by preventing those materials that can pose significant risks during the treatment process or cause harm if released into natural water bodies.

Corrosive materials can damage infrastructure and equipment at wastewater treatment facilities, leading to service disruptions and safety hazards. Fire hazards present risks of combustion and explosions both during transport and treatment. Toxic gases may lead to air quality issues and pose health risks to workers and surrounding communities. Therefore, strict prohibitions against their discharge are essential for ensuring that wastewater systems operate safely and effectively.

Other options refer to pollutants that may not necessarily fall under the same stringent prohibitions as those mentioned. For example, non-biodegradable waste can be problematic but is more often managed through regulations regarding solid waste rather than prohibitions specific to discharge standards. Similarly, chemical fertilizers and paper products might have guidelines for discharge but are not universally prohibited under the same standards. Industrial effluents with high pH also have regulations, though they may fall within different management protocols rather than being a blanket prohibition.