Which type of wastewater system is mandated by a municipality when recommending a Class 5 system for a cottage?

A Holding Tank System is specifically mandated by municipalities as a Class 5 wastewater system in certain situations, particularly for cottages or properties that are not connected to a municipal sewage system. This type of system is designed to store wastewater temporarily until it can be transported to a treatment facility.

The rationale for recommending a Holding Tank System often stems from environmental concerns, as these systems help prevent the direct discharge of effluent into the ground, which could contaminate groundwater or nearby water bodies due to factors like limited soil absorption capacity.

In contrast, the other options either do not apply to Class 5 systems specifically or are not mandated in the same way. For example, a Grey Water System primarily treats only wastewater from baths, sinks, and washers, not containing human waste. Municipal Sewer Systems are typically available only in urban areas, making them less relevant for cottages often situated in rural areas. Primary Treatment Systems involve basic sedimentation and are not suitable when more reliable management of effluent is necessary. Finally, Septic Systems, while commonly used, do not fall under the Class 5 designation when specifically discussing requirements imposed by municipalities in this context.