saprobic index

https://doi.org/10.1351/goldbook.15012
Means of classifying the saprobic state of running waters, covering the full range from unpolluted to extremely polluted waters.
Source:
PAC, 2009, 81, 829. (Glossary of terms used in ecotoxicology (IUPAC Recommendations 2009)) on page 942 [Terms] [Paper]