Jump to main content.

Technical Assistance and Guidance Documents

Biocriteria Links

Stressor Identification Guidance

Based on the Stressor Identification (SI) Guidance Document, CADDIS, otherwise known as the Causal Analysis/Diagnosis Decision Information System, is an online application that uses a step-by-step guide, worksheets, and examples to help scientists and engineers find, access, organize, share, and use environmental information to evaluate causes of biological effects observed in aquatic systems such as streams, lakes, and estuaries.

CADDIS uses the SI process — a formal and rigorous process to identify stressors causing biological impairments in aquatic ecosystems — and a structure for organizing the scientific evidence supporting the conclusions. CADDIS also contains updates, clarifications and additional material developed since the SI Guidance Document was published in 2000.

Biological Indicators

Local Navigation

Jump to main content.