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Blue-Green Algae > Test Results Test Results

Toxin Guide

  • <4ug/l – very low /no risk – corresponds to World Health Organization Level 1 Recreational Water Guideline – use common sense practices
  • 4-20 ug/l – low to moderate risk of adverse health affects – corresponds to World Health Organization Level 2 Recreational Water Guideline - reduce recreational contact with water
  • >20 ug/l - seriously consider avoiding contact with water until levels of toxin decrease