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
Comments
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.
Blue-green algae were present throughout the entire bay.
9/19/2012 Dogwood Lane 0.23 Low risk
9/19/2012 Skipper’s Marina 0.30 Low risk
9/19/2012 Oak Park Marina 0.12 Minimal risk
9/19/2012 Emerald Point Road 0.06 Minimal risk
9/19/2012 Arney’s Marina 0.26 Low risk
9/19/2012 Katlynn Marina 0.51 Low risk
9/19/2012 Public Beach Pier 0.44 Low risk
Comments
All samples collected on September 19th were analyzed for blue-green algal toxins using the protein phosphatase inhibition assay.
Blue-green algae were present throughout the entire bay.
Samples were collected during rain storms with high winds and no surface blooms were visible.
These samples showed minimal risk for microcystin toxins. Users are still encouraged to avoid contact with visible blooms as other irritants may be present.
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.
RE: Results of Sodus Bay Toxin Samples Collected on September 6th, 2012:
9/6/2012 Dogwood Lane 0.042 Minimal risk
9/6/2012 Skipper’s Marina 0.028 Minimal risk
9/6/2012 Oak Park Marina 0.07 Minimal risk
9/6/2012 Emerald Point Rd 0.012 Minimal risk
9/6/2012 Arney’s Marina 0.042 Minimal risk
9/6/2012 Katlynn Marina 0.042 Minimal risk
9/6/2012 Public Beach Pier 0.045 Minimal risk
Comments:
All samples collected on September 6th were analyzed for blue-green algal toxins using the protein phosphatase inhibition assay. There was a blue-green algal bloom within the Bay. There was the greatest accumulation on the eastern shore due to strong winds, but was also seen in some of the alcoves around the Bay.
Values given in red are preliminary results and require further processing. Any new results will be distributed as soon as they are available.
These samples showed minimal risk for microcystin toxins. Users are still encouraged to avoid contact with visible blooms as other irritants may be present.
8/29/2012 Dogwood Lane <0.60 Low risk
8/29/2012 Skipper’s Marina <0.60 Low risk
8/29/2012 Oak Park Marina <0.60 Low risk
8/29/2012 Emerald Point Rd <0.60 Low risk
8/29/2012 Arney’s Marina <0.60 Low risk
8/29/2012 Katlynn Marina <0.60 Low risk
8/29/2012 Public Beach Pier <0.60 Low risk
Comments:
All samples collected on August 29th were analyzed for blue-green algal toxins using the protein phosphatase inhibition assay. Water quality was good. Blue-green algae presence is persistent within the Bay.
These samples showed low risk for microcystin toxins. Users are still encouraged to avoid contact with visible blooms as other irritants may be present.
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