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Aquatic Life

National water quality criteria for the protection of aquatic organisms and their uses:


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Guidelines for deriving numerical criteria

EPA Science Advisory Board Activies Related to Guidelines Revisions

Finalized criteria

Criteria under development

EPA is revising the current aquatic life criteria for lead, silver, and selenium, re-evaluating the current aquatic life criteria for ammonia, and developing new aquatic life criteria for atrazine.

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Soliciting Scientific Information

Fact Sheet: Ocean Acidification and Marine pH Water Quality Criteria (April 2009) | Federal Register Notice: Notice of Data Availability on Ocean Acidification and Marine pH Water Quality Criteria (April 15, 2009)

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Other resources

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Water Quality Standards | Drinking Water | Research and Development


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