There are several components that are used to determine this, including biological status, which looks at the quantity and varieties of invertebrates, angiosperms and fish. Chemical status, which compares the concentrations of various chemicals against known safe concentrations, is rated good or fail.
Several elements contribute to determining this, encompassing biological aspects such as the quantity and diversity of invertebrates, angiosperms, and fish. Chemical assessments are also considered, comparing chemical concentrations against known safe levels, leading to either a "good" or "fail" classification.