What is needed to determine the minimum size of an aerobic treatment unit for a specific home?

The correct answer focuses on the number of bedrooms and square footage of the home because these factors are directly related to the expected occupancy and wastewater generation. The number of bedrooms provides an indication of how many people may be living in the home, as more bedrooms typically suggest more inhabitants, which correlates with increased water usage and wastewater production.

Square footage complements this information by providing a broader context regarding the size of the household. Larger homes generally accommodate more residents, representing an additional demand on the treatment system. Together, these parameters are critical in calculating the necessary capacity for an aerobic treatment unit, ensuring that it can effectively handle the amount of wastewater generated under normal conditions.

Other factors, while potentially relevant to some extent, do not provide the same direct link to wastewater generation. For example, the age of the home and plumbing quality (related aspects) might influence system efficiency but do not determine the unit’s minimum size. Similarly, daily wastewater production is important but is ultimately a result of occupancy, which is better assessed through the number of bedrooms and square footage. Proximity to water sources is mostly a consideration for site suitability and local regulations rather than directly impacting the sizing of the treatment unit.