Jump to main content or area navigation.

Contact Us

Water: Monitoring & Assessment

Biological Assessment

Biological assessments are evaluations of the condition of waterbodies using surveys and other direct measurements of resident biological organisms (macroinvertebrates, fish, and plants). Biological assessment results are used to answer the question of whether waterbodies support survival and reproduction of desirable fish, shellfish, and other aquatic species -- in other words, if the waterbodies meet their designated aquatic life uses.

The following documents provide information on biological assessment methods and the status of biological assessment programs in the U.S.

Links to other documents and websites:

Jump to main content.