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PoorBeach: Lk Sup, Grand Marais Downtown/Marina in Grand Marais
031, MN
Water Quality
Updated Aug 25Escherichia coli (E. coli) Bacteria3.1 MPN/100mL
Common fecal coliform bacteria indicating possible sewage contamination. EPA recreational limit: <126 MPN/100mL.
Water Temperature13.3 °C
Water temperature directly affects fish metabolism and activity. Optimal range varies by species.
Water Temperature13.3 °C
Water temperature directly affects fish metabolism and activity. Optimal range varies by species.
Escherichia coli (E. coli) Bacteria3.1 MPN/100mL
Common fecal coliform bacteria indicating possible sewage contamination. EPA recreational limit: <126 MPN/100mL.
Score Breakdown
recency/
coverage/
parameters present/