Water Quality Criteria & Effluent Limits
Criteria to Protect Aquatic Life
EPA publishes criteria recommendations for water quality that can be used by states to ensure that waterbodies have desired characteristics, including protections for aquatic life. Such characteristics are highly variable across both space and time, and states have the right to deviate from EPA’s recommendations when it is scientifically appropriate to do so. NCASI maintains expertise in the techniques used to derive aquatic life water quality criteria and can contribute science to questions related to the appropriateness of these criteria, their implementation, and their use as the basis for justifying mill permit requirements.