Table 1 Classification of the waterbodies by the saprobic system.
From: Protozoan communities serve as a strong indicator of water quality in the Nile River
Saprobic level | Saprobic index | Degree of organic pollution | Habitat quality class |
|---|---|---|---|
Oligosaprobic | 1.0 to < 1.5 | Non-polluted | I |
Oligosaprobic to β-Mesosaprobic | 1.5 to < 1.8 | Waters without organic load | I-II |
β- Mesosaprobic | 1.8 to < 2.3 | Waters with a moderate organic load | II |
β- Mesosaprobic to α- Mesosaprobic | 2.3 to < 2.7 | Waters with critical organic load | II-III |
α- Mesosaprobic | 2.7 to < 3.2 | Waters strongly polluted/ | III |
α- Mesosaprobic to polysaprobic | 3.2 to < 3.5 | Waters are very strongly polluted | III-IV |
Polysaprobic | 3.5 to < 4.0 | Waters exceptionally polluted | IV |
