What is one of the primary contaminants of concern in OSSF systems?

In the context of On-Site Sewage Facilities (OSSF) systems, suspended solids are indeed a significant contaminant of concern. Suspended solids consist of particles that can remain afloat in wastewater rather than settling to the bottom. These solids can include various organic and inorganic materials, such as food waste, dirt, and other debris.

The presence of suspended solids can lead to various problems within the OSSF system. For instance, they can contribute to the clogging of pipes and treatment systems, which may hinder the effective functioning of the sewage treatment process. Additionally, if these solids are not adequately removed or treated, they can be released into the environment. This can potentially lead to contamination of groundwater or surface water, which poses risks to both public health and the environment.

While nitrogen and phosphorus are critical concerns when it comes to nutrient pollution, especially in relation to algae blooms in water bodies, suspended solids are often prioritized in the context of system performance and immediate operational concerns. Aerobic bacteria, while essential for breaking down waste in aerobic treatment systems, are a part of the treatment process rather than contaminants themselves.