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Return to Nonpoint Source Pollution: Nutrients

Harmful algal blooms (HABs) occur under eutrophic conditions. Although these organisms are not harmful in small quantities and exist naturally, they grow at rapid rates when eutrophication occurs. When fish and shellfish feed on HABs, they ingest toxins that the algae produce. If people eat this seafood, they can become sick.

Harmful algal blooms (HABs) occur under eutrophic conditions

 

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