What does the term "malfunctioning OSSF" imply?

The term "malfunctioning OSSF" specifically refers to a situation where the on-site sewage facility is not functioning as intended, leading to issues such as environmental contamination, health risks, or failure to meet regulatory standards. This includes scenarios where the system may be overflowing, failing to adequately treat sewage, or discharging improperly. Such a condition would be classified as causing a nuisance or non-compliance with regulations, which poses risks not only to public health but also to the environment.

In contrast, other options reflect different conditions or statuses of an OSSF. For example, functioning above capacity indicates an operational issue but does not necessarily equate to a malfunction. A newly installed system under testing is in a different phase of operation, while a temporary out-of-service situation for maintenance is not inherently indicative of malfunction but rather a planned interruption. Each of these other circumstances does not capture the essence of what constitutes a malfunctioning system, which revolves around problems that disrupt the proper operation and compliance of the facility.