RE: Results of Sodus Bay Toxin Samples Collected on September 26th, 2012:
Collection Date Sample Site Blue-green algal toxin analysis
(Microcystins) Concentration (μg/L)
9/26/2012 Dogwood Lane 1.20 Moderate risk
9/26/2012 Skipper’s Marina 0.38 Low risk
9/26/2012 Oak Park Marina 1.19 Moderate risk
9/26/2012 Emerald Point Road 0.06 Minimal risk
9/26/2012 Arney’s Marina 1.43 Moderate risk
9/26/2012 Katlynn Marina 19.53 Higher risk
9/26/2012 Public Beach Pier 0.71 Low risk
Appears that our cyanobacteria bloom finally came to Sodus Bay this year. Fortunately it was late in the season.
Toxicity is widespread and concentrated around the shoreline and marinas.
Hopefully our cold and windy weather will flush this out this week
1 World Health Organization (WHO) guidelines for interpretation of the results. In cases where no toxin was detected, the possible risk category is reported based on the detection limit.
0.0-0.2 μg/L Little to no risk from blue-green algal toxins: Minimal risk.
0.2-1.0 μg/L Toxin detected but below the WHO drinking water guidelines: Low risk
1.0 – 10 μg/L Toxin levels are above the WHO drinking water guidelines but generally below the limits for recreational contact: Moderate risk
10-20 μg/L Toxin levels are significant and approach the
WHO limit for recreational contact: Higher risk
>20 μg/L Toxin levels exceed the WHO guidelines for recreational contact: Highest risk. Users should avoid contact with the blooms.